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Journal articles on the topic 'Photothermal polymerization'

Author: Grafiati

Published: 25 May 2024

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1

Hou, Shi-Chang, Dao-Wei Zhang, Jun Chen, Xiao-Xiao Guo, Abdul Haleem, and Wei-Dong He. "Sulfonated PAM/PPy Cryogels with Lowered Evaporation Enthalpy for Highly Efficient Photothermal Water Evaporation." Polymers 15, no. 9 (April 28, 2023): 2108. http://dx.doi.org/10.3390/polym15092108.

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Because of the increasing scarcity of water resources, the desalination of seawater by photothermal evaporation with harvested solar energy has gradually become a popular research topic. The interconnected macroporous cryogel prepared from polymerization and crosslinking below the freezing temperature of the reactant solution has an excellent performance in photothermal water evaporation after loading photothermal materials. In this study, polyacrylamide (PAM) cryogels were prepared by cryo-polymerization and sulfonated in an alkaline solution containing formaldehyde and Na2SO3. Importantly, the evaporation enthalpy of water in sulfonated PAM cryogel was reduced to 1187 J·g−1 due to the introduction of sulfonate groups into PAM, which was beneficial to increase the photothermal evaporation rate and efficiency. The sulfonated PAM cryogels loaded with polypyrrole and the umbrella-shaped melamine foam substrate were combined to form a photothermal evaporation device, and the evaporation rate was as high as 2.50 kg·m−2·h−1 under one-sun radiation. Meanwhile, the evaporation rate reached 2.09 kg·m−2·h−1 in the 14 wt% high-concentration saline solution, and no salt crystals appeared on the surface of the cryogel after 5 h of photothermal evaporation. Therefore, it was evidenced that the presence of sulfonate groups not only reduced the evaporation enthalpy of water but also prevented salting-out from blocking the water delivery channel during photothermal evaporation, with a sufficiently high evaporation rate, providing a reliable idea of matrix modification for the design of high-efficiency photothermal evaporation materials.

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2

Wang, Yanming, Xin Ji, Peng Pang, Yunfeng Shi, Jian Dai, Jiake Xu, Jianping Wu, Thomas Brett Kirk, and Wei Xue. "Synthesis of Janus Au nanorods/polydivinylbenzene hybrid nanoparticles for chemo-photothermal therapy." Journal of Materials Chemistry B 6, no. 16 (2018): 2481–88. http://dx.doi.org/10.1039/c8tb00233a.

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3

Hou, Liman, Jianyong Fang, Weiqi Wang, Zhigang Xie, Dewen Dong, and Ning Zhang. "Indocyanine green-functionalized bottle brushes of poly(2-oxazoline) on cellulose nanocrystals for photothermal cancer therapy." Journal of Materials Chemistry B 5, no. 18 (2017): 3348–54. http://dx.doi.org/10.1039/c7tb00812k.

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4

Haas, Kaitlin M., and Benjamin J. Lear. "Billion-fold rate enhancement of urethane polymerization via the photothermal effect of plasmonic gold nanoparticles." Chemical Science 6, no. 11 (2015): 6462–67. http://dx.doi.org/10.1039/c5sc02149a.

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5

Ci, Dazheng, Ning Wang, Yunqi Xu, Shanshan Wu, Jing Wang, Haoran Li, Shouhu Xuan, and Qunling Fang. "SiO₂@AuAg/PDA hybrid nanospheres with photo-thermally enhanced synergistic antibacterial and catalytic activity." RSC Advances 14, no. 7 (2024): 4518–32. http://dx.doi.org/10.1039/d3ra07607e.

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SiO2@AuAg/Polydopamine core/shell nanospheres, which possessed synergistic “Ag+-release–photothermal” antibacterial and catalytic behaviors, have been successfully prepared via a simple in situ redox polymerization method.

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6

Qian, Hongyun, Huiping Dang, Changchang Teng, Dalong Yin, and Lifeng Yan. "Synthesis of pH-responsive supramolecular polypeptide nanoparticles from α-amino acids for combined chemo-photothermal therapy." JUSTC 53, no. 3 (2023): 0305. http://dx.doi.org/10.52396/justc-2022-0154.

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A new smart supramolecular polypeptide copolymer P(Glu-co-Lys) was synthesized by the polymerization of α-amino acids using the N-thiocarboxylic acid anhydride (NTA) method, using the pH dynamic response peptide of L-glutamic acid and L-lysine as a carrier for tumor cells. The drug delivery system activated by external acid can self-assemble (pH 7.4) and disassemble (pH 5.5) under the adjustment of pH to load the drug and control its release. Doxycycline (DOX) and the photothermal reagent hydrophilic quanternary stereo-cyanine (HQS-Cy) were loaded into the peptide copolymer to obtain HQS-Cy/DOX nanoparticles (NPs) for chemo-photothermal therapy. Gentle photothermal heating can enhance the absorption of drugs by cells and enhance the efficacy of chemotherapy. In addition, chemo-photothermal therapy can solve the defect of easy recurrence after single photothermal therapy. The ingenious nanodrug delivery system of HQS-Cy/DOX NPs provides great potential for the improvement of chemo-photothermal therapy and will achieve excellent therapeutic effects in cancer treatment.

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7

Dean, Leon M., Amogha Ravindra, Allen X. Guo, Mostafa Yourdkhani, and Nancy R. Sottos. "Photothermal Initiation of Frontal Polymerization Using Carbon Nanoparticles." ACS Applied Polymer Materials 2, no. 11 (August 24, 2020): 4690–96. http://dx.doi.org/10.1021/acsapm.0c00726.

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8

Yang, Mei, Minfang Zhang, Masao Kunioka, Ryota Yuge, Toshinari Ichihashi, Sumio Iijima, and Masako Yudasaka. "Photothermal conversion of carbon nanohorns enhancing caprolactone polymerization." Carbon 83 (March 2015): 15–20. http://dx.doi.org/10.1016/j.carbon.2014.11.022.

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9

Li, Feng, Yaqin Song, Miao Yao, Jun Nie, and Yong He. "Design and properties of novel photothermal initiators for photoinduced thermal frontal polymerization." Polymer Chemistry 11, no. 24 (2020): 3980–86. http://dx.doi.org/10.1039/d0py00305k.

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Three synthesized photothermal initiators (2959-HDHP, 184-HDHP, 1173-HDHP) exhibited better photoinduced thermal frontal polymerization effect than mixture system due to higher heat transfer efficiency from photopolymerization to thermal initiator.

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10

Bhattarai, Deval Prasad, and Beom Su Kim. "NIR-Triggered Hyperthermal Effect of Polythiophene Nanoparticles Synthesized by Surfactant-Free Oxidative Polymerization Method on Colorectal Carcinoma Cells." Cells 9, no. 9 (September 18, 2020): 2122. http://dx.doi.org/10.3390/cells9092122.

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In this work, polythiophene nanoparticles (PTh–NPs) were synthesized by a surfactant-free oxidative chemical polymerization method at 60 °C, using ammonium persulphate as an oxidant. Various physicochemical properties were studied in terms of field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Fourier transform infra-red (FT-IR) spectroscopy, and differential scanning calorimetry (DSC)/thermogravimetric analysis (TGA). Photothermal performance of the as-synthesized PTh–NPs was studied by irradiating near infra-red of 808 nm under different concentration of the substrate and power supply. The photothermal stability of PTh–NPs was also studied. Photothermal effects of the as-synthesized PTh–NPs on colorectal cancer cells (CT-26) were studied at 100 µg/mL concentration and 808 nm NIR irradiation of 2.0 W/cm2 power. Our in vitro results showed remarkable NIR laser-triggered photothermal apoptotic cell death by PTh–NPs. Based on the experimental findings, it is revealed that PTh–NPs can act as a heat mediator and can be an alternative material for photothermal therapy in cancer treatment.

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11

Xie, Yixin, Ji Xu, Hui Jin, Yunfeng Yi, Yuqing Shen, Xiuming Zhang, Xinxin Liu, et al. "Polypyrrole Nanosheets Prepared by Rapid In Situ Polymerization for NIR-II Photoacoustic-Guided Photothermal Tumor Therapy." Coatings 13, no. 6 (June 2, 2023): 1037. http://dx.doi.org/10.3390/coatings13061037.

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Recently, the near-infrared-II (NIR-II, 1000–1350 nm) region has been extensively applied in deep-tissue photothermal therapy (PTT) on account of it having stronger tissue penetration and a higher maximum permissible exposure (MPE) than the near-infrared-I (NIR-I, 650–950 nm) region. In this study, we developed a rapid and convenient in situ polymerization strategy to fabricate polypyrrole nanosheets (PPy NSs) within a few minutes using manganese dioxide nanosheets (MnO2 NSs) as both the oxidant and the self-sacrificed template. The fabricated PPy NSs exhibited excellent NIR-II absorption, which conferred its high photothermal conversion efficiency (66.01%) at 1064 nm and its photoacoustic (PA) imaging capability. Both in vivo and in vitro studies have shown that that PPy NSs possess good biological safety and excellent PTT efficacy and PA imaging performances. Thus, the as-synthesized PPy NSs could effectively achieve PA imaging-guided photothermal tumor ablation under 1064 nm excitation. Our work provides a novel and promising method for the rapid preparation of PPy NSs without the addition of exogenous oxidants and subsequent template removal, which could be regarded as potential photothermal agents (PTAs) to integrate the diagnosis and treatment of cancer.

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12

Jiang, Xue, Yu Sun, Lihuang Shang, Conglian Yang, Li Kong, and Zhiping Zhang. "Green tea extract-assembled nanoclusters for combinational photothermal and chemotherapy." Journal of Materials Chemistry B 7, no. 39 (2019): 5972–82. http://dx.doi.org/10.1039/c9tb01546a.

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13

Walker, Joan M., Linfeng Gou, Sibaprasad Bhattacharyya, Sarah E. Lindahl, and Jeffrey M. Zaleski. "Photothermal Plasmonic Triggering of Au Nanoparticle Surface Radical Polymerization." Chemistry of Materials 23, no. 23 (December 13, 2011): 5275–81. http://dx.doi.org/10.1021/cm202741p.

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14

Bonardi, Aude heloise, Fabrice Bonardi, Frédéric Dumur, Didier Gigmes, Jean Pierre Fouassier, and Jacques Lalevée. "Fillers as Heaters for Photothermal Polymerization upon NIR Light." Macromolecular Rapid Communications 40, no. 23 (October 30, 2019): 1900495. http://dx.doi.org/10.1002/marc.201900495.

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15

Chen, Xu, Feng Gao, and Lihua Yang. "Polymerized small molecular dyes providing nanoparticles with stable photosensitivity for eradicating cancer cells." JUSTC 53, no. 6 (2023): 0607. http://dx.doi.org/10.52396/justc-2023-0056.

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To make small molecular photosensitizer-based nanoparticles photostable, we polymerized such photosensitizers via emulsion polymerization, and the resulting nanoparticles exhibited sustained absorption of the excitation wavelength in the near-infrared region, generated stable photothermal and photodynamic effects upon repeated irradiation with an near-infrared laser, and efficiently eradicated cancerous cells even after prior irradiation exposure.

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16

Jiang, Yu, Xingchen Duan, Junhua Bai, Hongkun Tian, Dan Ding, and Yanhou Geng. "Polymerization-induced photothermy: A non-donor-acceptor approach to highly effective near-infrared photothermal conversion nanoparticles." Biomaterials 255 (October 2020): 120179. http://dx.doi.org/10.1016/j.biomaterials.2020.120179.

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17

Li, Xiaoting, Xianchun Liu, Xiaoguang Qiao, and Shuangxi Xing. "Confining the polymerization of aniline to generate yolk–shell polyaniline@SiO2 nanostructures." RSC Advances 5, no. 96 (2015): 79172–77. http://dx.doi.org/10.1039/c5ra15065e.

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Yolk–shell nanostructured polyaniline@SiO₂ particles were fabricated by using CeO₂@SiO₂ particles as reactive and confined templates and the samples were applied in drug loading and photothermal release as a proof of concept.

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18

Yao, Lan, Haihui Li, Kai Tu, Lifen Zhang, Zhenping Cheng, and Xiulin Zhu. "Construction of NIR Light Controlled Micelles with Photothermal Conversion Property: Poly(poly(ethylene glycol)methyl ether methacrylate) (PPEGMA) as Hydrophilic Block and Ketocyanine Dye as NIR Photothermal Conversion Agent." Polymers 12, no. 5 (May 21, 2020): 1181. http://dx.doi.org/10.3390/polym12051181.

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Polymeric nanomaterials made from amphiphilic block copolymers are increasingly used in the treatment of tumor tissues. In this work, we firstly synthesized the amphiphilic block copolymer PBnMA-b-P(BAPMA-co-PEGMA) via reversible addition-fragmentation chain transfer (RAFT) polymerization using benzyl methacrylate (BnMA), poly (ethylene glycol) methyl ether methacrylate (PEGMA), and 3-((tert-butoxycarbonyl)amino)propyl methacrylate (BAPMA) as the monomers. Subsequently, PBnMA-b-P(APMA-co-PEGMA)@NIR 800 with photothermal conversion property was obtained by deprotection of the tert-butoxycarbonyl (BOC) groups of PBAPMA chains with trifluoroacetic acid (TFA) and post-modification with carboxyl functionalized ketocyanine dye (NIR 800), and it could self-assemble into micelles in CH3OH/water mixed solvent. The NIR photothermal conversion property of the post-modified micelles were investigated. Under irradiation with NIR light (λmax = 810 nm, 0.028 W/cm2) for 1 h, the temperature of the modified micelles aqueous solution increased to 53 °C from 20 °C, which showed the excellent NIR photothermal conversion property.

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19

Kawashima, H., H. Mayama, Y. Nakamura, and S. Fujii. "Hydrophobic polypyrroles synthesized by aqueous chemical oxidative polymerization and their use as light-responsive liquid marble stabilizers." Polymer Chemistry 8, no. 17 (2017): 2609–18. http://dx.doi.org/10.1039/c7py00158d.

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20

Vedanarayanan, V., J. Dilli Srinivasan, K. Arulvendhan, P. Thirusenthil Kumaran, R. Selvakumar, H. S. Asif, M. H. Siddique, and Jifara Chimdi. "Synthesis of Modified Phase-Changing Material with Latent Heat and Thermal Conductivity to Store Solar Energy Using a Carbon Nanotube." International Journal of Photoenergy 2022 (April 11, 2022): 1–12. http://dx.doi.org/10.1155/2022/3412817.

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MicroPCMs’ excellent thermal capacity and photothermal translation features benefit solar energy storage applications significantly. A successful in situ polymerization procedure was employed to build microencapsulated phase-change materials using n-hexadecanol as the core and melamine-formaldehyde resin as the outer shell, and the thermal characteristics of the microPCMs were evaluated. In terms of micromorphology, the incorporation of hydroxylated carbon nanotubes into microPCMs with a compact shell has little effect on their spherical structure. MicroPCMs’ melting heat and latent heat are both 51.5°C with a 0.2 weight percent dose of hydroxylated carbon nanotubes, and n-energy hexadecanol’s storage efficiency is determined to be 75.25 percent. Thermal conductivity and photothermal conversion efficiency of microencapsulated phase-change materials engendered with increased hydroxylated carbon nanotube dosage have improved significantly, laying the foundation for improved photothermal storage efficiency. When 0.6 weight % hydroxylated carbon nanotubes are added to the mixture, microencapsulated phase-change materials have a thermal conduction of 0.3597 Wm−1·K−1 and 181.5 J·g−1. Additionally, all of the improved microPCMs show exceptional thermal stability across 500 heat cycles. Because of their large thermal capability and efficient photothermal conversion, the new microPCMs appear to be an appealing option for solar energy storage in direct-absorption solar collector systems.

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21

Bae, Seo Ryung, Jihye Choi, Hyun-Ouk Kim, Byunghoon Kang, Myeong-Hoon Kim, Seungmin Han, Ilkoo Noh, et al. "Pseudo metal generation via catalytic oxidative polymerization on the surface of reactive template for redox switched off–on photothermal therapy." Journal of Materials Chemistry B 3, no. 3 (2015): 505–13. http://dx.doi.org/10.1039/c4tb01461h.

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22

Caron, Aurore, Guillaume Noirbent, Didier Gigmes, Frédéric Dumur, and Jacques Lalevée. "Near‐Infrared PhotoInitiating Systems: Photothermal versus Triplet–Triplet Annihilation‐Based Upconversion Polymerization." Macromolecular Rapid Communications 42, no. 11 (March 14, 2021): 2100047. http://dx.doi.org/10.1002/marc.202100047.

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23

Lee, Hwangjae, Semin Kim, Chiseon Ryu, and Jae Young Lee. "Photothermal Polymerization Using Graphene Oxide for Robust Hydrogelation with Various Light Sources." ACS Biomaterials Science & Engineering 6, no. 4 (March 23, 2020): 1931–39. http://dx.doi.org/10.1021/acsbiomaterials.0c00161.

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24

Lee, Hwangjae, Solchan Chung, Min-Gon Kim, Luke P. Lee, and Jae Young Lee. "Near-Infrared-Light-Assisted Photothermal Polymerization for Transdermal Hydrogelation and Cell Delivery." Advanced Healthcare Materials 5, no. 13 (April 24, 2016): 1638–45. http://dx.doi.org/10.1002/adhm.201600048.

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25

Li, Ruiting, Xiaodong Lian, Zhen Wang, and Yapei Wang. "Radical Cation Initiated Surface Polymerization on Photothermal Rubber for Smart Antifouling Coatings." Chemistry – A European Journal 25, no. 1 (December 4, 2018): 183–88. http://dx.doi.org/10.1002/chem.201804526.

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26

Peñuñuri-Miranda, Omar, Miguel Olivas-Martinez, José Alberto Ibarra-Espinoza, Rosalva Josefina Rodríguez-Córdova, Karol Yesenia Hernández-Giottonini, Daniel Fernández-Quiroz, Paul Zavala-Rivera, and Armando Lucero-Acuña. "Spatiotemporal Temperature Distribution of NIR Irradiated Polypyrrole Nanoparticles and Effects of pH." Polymers 14, no. 15 (August 2, 2022): 3151. http://dx.doi.org/10.3390/polym14153151.

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The spatiotemporal temperature distributions of NIR irradiated polypyrrole nanoparticles (PPN) were evaluated by varying PPN concentrations and the pH of suspensions. The PPN were synthesized by oxidative chemical polymerization, resulting in a hydrodynamic diameter of 98 ± 2 nm, which is maintained in the pH range of 4.2–10; while the zeta potential is significantly affected, decreasing from 20 ± 2 mV to −5 ± 1 mV at the same pH range. The temperature profiles of PPN suspensions were obtained using a NIR laser beam (1.5 W centered at 808 nm). These results were analyzed with a three-dimensional predictive unsteady-state heat transfer model that considers heat conduction, photothermal heating from laser irradiation, and heat generation due to the water absorption. The temperature profiles of PPN under laser irradiation are concentration-dependent, while the pH increase only induces a slight reduction in the temperature profiles. The model predicts a value of photothermal transduction efficiency (η) of 0.68 for the PPN. Furthermore, a linear dependency was found for the overall heat transfer coefficient (U) and η with the suspension temperature and pH, respectively. Finally, the model developed in this work could help identify the exposure time and concentration doses for different tissues and cells (pH-dependent) in photothermal applications.

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27

Xu, Kezhu, Qunling Fang, Jing Wang, Ailing Hui, and Shouhu Xuan. "Magnetic-Field-Induced Improvement of Photothermal Sterilization Performance by Fe3O4@SiO2@Au/PDA Nanochains." Materials 16, no. 1 (December 31, 2022): 387. http://dx.doi.org/10.3390/ma16010387.

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Due to the abuse of antibiotics, the sensitivity of patients to antibiotics is gradually reduced. This work develops a Fe3O4@SiO2@Au/PDA nanochain which shows an interesting magnetic-field-induced improvement of its photothermal antibacterial property. First, SiO2 was wrapped on Fe3O4 nanospheres assembled in a chain to form a Fe3O4@SiO2 nanocomposite with a chain-like nanostructure. Then, the magnetic Fe3O4@SiO2@Au/PDA nanochains were prepared using in situ redox-oxidization polymerization. Under the irradiation of an 808 nm NIR laser, the temperature rise of the Fe3O4@SiO2@Au/PDA nanochain dispersion was obvious, indicating that they possessed a good photothermal effect. Originating from the Fe3O4, the Fe3O4@SiO2@Au/PDA nanochain showed a typical soft magnetic behavior. Both the NIR and magnetic field affected the antimicrobial performance of the Fe3O4@SiO2@Au/PDA nanochains. Escherichia coli and Staphylococcus aureus were used as models to verify the antibacterial properties. The experimental results showed that the Fe3O4@SiO2@Au/PDA nanochains exhibited good antibacterial properties under photothermal conditions. After applying a magnetic field, the bactericidal effect was further significantly enhanced. The above results show that the material has a broad application prospect in inhibiting the growth of bacteria.

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28

Acter, Shahinur, Michele Moreau, Robert Ivkov, Akila Viswanathan, and Wilfred Ngwa. "Polydopamine Nanomaterials for Overcoming Current Challenges in Cancer Treatment." Nanomaterials 13, no. 10 (May 17, 2023): 1656. http://dx.doi.org/10.3390/nano13101656.

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In efforts to overcome current challenges in cancer treatment, multifunctional nanoparticles are attracting growing interest, including nanoparticles made with polydopamine (PDA). PDA is a nature-inspired polymer with a dark brown color. It has excellent biocompatibility and is biodegradable, offering a range of extraordinary inherent advantages. These include excellent drug loading capability, photothermal conversion efficiency, and adhesive properties. Though the mechanism of dopamine polymerization remains unclear, PDA has demonstrated exceptional flexibility in engineering desired morphology and size, easy and straightforward functionalization, etc. Moreover, it offers enormous potential for designing multifunctional nanomaterials for innovative approaches in cancer treatment. The aim of this work is to review studies on PDA, where the potential to develop multifunctional nanomaterials with applications in photothermal therapy has been demonstrated. Future prospects of PDA for developing applications in enhancing radiotherapy and/or immunotherapy, including for image-guided drug delivery to boost therapeutic efficacy and minimal side effects, are presented.

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29

Martínez-Torres, P., A. Mandelis, and J. J. Alvarado-Gil. "Photothermal determination of thermal diffusivity and polymerization depth profiles of polymerized dental resins." Journal of Applied Physics 106, no. 11 (December 2009): 114906. http://dx.doi.org/10.1063/1.3266007.

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30

Wang, Changling, Guiling Zhang, and Xiaosong Zhang. "Experimental and Photothermal Performance Evaluation of Multi-Wall Carbon-Nanotube-Enhanced Microencapsulation Phase Change Slurry for Efficient Photothermal Conversion and Storage." Energies 15, no. 20 (October 15, 2022): 7627. http://dx.doi.org/10.3390/en15207627.

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Melamine formaldehyde was used as the shell material and n-eicosane as the core material with the method of in situ polymerization to synthesize microencapsulated phase change materials (MPCMs). To enhance the thermophysical characteristics and photothermal conversion performance of the MPCM slurry, multi-wall carbon nanotubes were added, and the microscopic morphology and thermophysical parameters of the MWCNT-MPCM slurry were analyzed. The thermal conductivity, viscosity, and photothermal conversion properties of the slurry were examined. The results indicated that the synthesized MPCMs were nucleated and unbroken, with a spherical form and a latent heat of phase transition of up to 135.92 kJ/kg. The MPCM was stable when dispersed in water, and its thermal conductivity rose with the temperature but slightly decreased during the phase transition period. The viscosity rose with the addition of the MPCM, with a jump at 20% MPCM content. The addition of MWCNTs had a minor effect on the material’s thermophysical properties. The thermal conductivity increased from 0.55 W/m·°C to 0.6 W/m·°C when MWCNTs were added to the material. The viscosity of a 20% MPCM slurry exceeded 3000 mPa·s when 0.5% MWCNTs were introduced. Under 1 sun of sunlight, the mixture’s peak temperature could reach 60 °C at 0.5% MWCNT concentration. The MWCNT-MPCM slurry is capable of producing efficient solar photothermal conversion without sacrificing other thermophysical properties, and it has several applications in solar energy consumption and thermal engineering.

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31

Huang, Jiaxing. "Syntheses and applications of conducting polymer polyaniline nanofibers." Pure and Applied Chemistry 78, no. 1 (January 1, 2006): 15–27. http://dx.doi.org/10.1351/pac200678010015.

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Nanofibers with diameters of tens of nanometers appear to be an intrinsic morphological unit that was found to "naturally" form in the early stage of the chemical oxidative polymerization of aniline. In conventional polymerization, nanofibers are subject to secondary growth of irregularly shaped particles, which leads to the final granular agglomerates. The key to producing pure nanofibers is to suppress secondary growth. Based on this, two methods - interfacial polymerization and rapidly mixed reactions - have been developed that can readily produce pure nanofibers by slightly modifying the conventional chemical synthesis of polyaniline without the need for any template or structural directing material. With this nanofiber morphology, the dispersibility and processibility of polyaniline are now much improved. The nanofibers show dramatically enhanced performance over conventional polyaniline applications such as in chemical sensors. They can also serve as a template to grow inorganic/polyaniline nanocomposites that lead to exciting properties such as electrical bistability that can be used for nonvolatile memory devices. Additionally, a novel flash welding technique for the nanofibers has been developed that can be used to make asymmetric polymer membranes, form patterned nanofiber films, and create polymer-based nanocomposites based on an enhanced photothermal effect observed in these highly conjugated polymeric nanofibers.

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32

Han, Haijie, Shimiao Zhang, Yin Wang, Tingting Chen, Qiao Jin, Yangjun Chen, Zuhong Li, and Jian Ji. "Biomimetic drug nanocarriers prepared by miniemulsion polymerization for near-infrared imaging and photothermal therapy." Polymer 82 (January 2016): 255–61. http://dx.doi.org/10.1016/j.polymer.2015.11.022.

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33

Bonardi, Aude‐Heloise, Fabien Bonardi, Guillaume Noirbent, Frederic Dumur, Didier Gigmes, Celine Dietlin, and Jacques Lalevée. "Free‐radical polymerization upon near‐infrared light irradiation, merging photochemical and photothermal initiating methods." Journal of Polymer Science 58, no. 2 (January 6, 2020): 300–308. http://dx.doi.org/10.1002/pol.20190079.

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34

González-Ayón, Mirian A., Jacob Licea-Rodriguez, Eugenio R. Méndez, and Angel Licea-Claverie. "NVCL-Based Galacto-Functionalized and Thermosensitive Nanogels with GNRDs for Chemo/Photothermal-Therapy." Pharmaceutics 14, no. 3 (March 3, 2022): 560. http://dx.doi.org/10.3390/pharmaceutics14030560.

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Dual-function nanogels (particle size from 98 to 224 nm) synthesized via surfactant-free emulsion polymerization (SFEP) were tested as smart carriers toward synergistic chemo- and photothermal therapy. Cisplatin (CDDP) or doxorubicin (DOX) and gold nanorods (GNRDs) were loaded into galacto-functionalized PNVCL-based nanogels, where the encapsulation efficiency for CDDP and DOX was around 64 and 52%, respectively. PNVCL-based nanogels were proven to be an efficient delivery vehicle under conditions that mimic the tumor site in vitro. The release of CDDP or DOX was slower at pH 7.4 and 37 °C than at tumor conditions of pH 6 and 40 °C. On the other hand, in the systems with GNRDs at pH 7.4 and 37 °C, the sample was irradiated with a 785 nm laser for 10 min every hour, obtaining that the release profiles were even higher than in the conditions that simulated a cancer tissue (without irradiation). Thus, the present study demonstrates the synergistic effect of chemo- and photothermal therapy as a promising dual function in the potential future use of PNVCL nanogels loaded with GNRDs and CDDP/DOX to achieve an enhanced chemo/phototherapy in vivo.

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35

Hou, Guodong, Runhang Wei, Feiyu Zhang, Xuning Wang, Wei Lu, and Xiaoshi Qian. "Biomimetic Photothermal Actuator Exhibits Robust Motion and Omnidirectional Phototropism." Journal of Nanoelectronics and Optoelectronics 19, no. 1 (January 1, 2024): 29–35. http://dx.doi.org/10.1166/jno.2024.3534.

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Organisms in the natural world receive signals from the external environment and exhibit continuous propulsion. However, creating artificial systems that can rapidly track energy sources in real-time without human intervention and electronic circuit programming poses a significant challenge. Here, we have developed a soft actuator that mimics the phototropism of plants and possesses autonomous sensing and driving capabilities. The soft actuator is based on a thermo responsive PNIPAAM hydrogel, and its uniform incorporation of light-absorbing agents imparts photothermal response characteristics. Our preparation method involves a combination of ice templating and UV cryo-polymerization techniques, utilizing water as the primary solvent. This process results in the formation of substantial microscopic pores within the PNIPAAM hydrogel, greatly enhancing the rate at which water enters and exits the polymer network. The rapid response and recovery properties of the hydrogel soft actuator allow it to quickly track and align with a stimulus light source. Moreover, it can bend to 90° and undergo continuous oscillations, representing a substantial enhancement in performance compared to conventional composite PNIPAAM hydrogels. Furthermore, the soft actuator exhibits a low dependence on the type of incident light, as it can respond not only to pinpoint laser beams but also to broad-spectrum white light. This intelligent soft actuator holds promising applications in non-contact soft robotics, underwater propulsion systems, and various other fields.

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Yeung, Ka-Wai, Yuqing Dong, Ling Chen, Chak-Yin Tang, Wing-Cheung Law, Gary Chi-Pong Tsui, and Daniel S. Engstrøm. "Printability of photo-sensitive nanocomposites using two-photon polymerization." Nanotechnology Reviews 9, no. 1 (May 15, 2020): 418–26. http://dx.doi.org/10.1515/ntrev-2020-0031.

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AbstractTwo-photon polymerization direct laser writing (TPP DLW) is an emerging technology for producing advanced functional devices with complex three-dimensional (3D) micro-structures. Tremendous efforts have been devoted to developing two-photon polymerizable photo-sensitive nanocomposites with tailored properties. Light-induced reconfigurable smart materials such as liquid crystalline elastomers (LCEs) are promising materials. However, due to the difficulties in designing two-photon polymerizable liquid crystal monomer (LCM) nanocomposite photoresists, it is challenging to fabricate true 3D LCE micro-structures. In this paper, we report the preparation of photo-sensitive LCE nanocomposites containing photothermal nanomaterials, including multiwalled carbon nanotubes, graphene oxide and gold nanorods (AuNRs), for TPP DLW. The printability of the LCE nanocomposites is assessed by the fidelity of the micro-structures under different laser writing conditions. DLW of GO/LCM photoresist has shown a vigorous bubble formation. This may be due to the excessive heat generation upon rapid energy absorption of 780 nm laser energy. Compared to pure LCM photoresists, AuNR/LCM photoresists have a lower laser intensity threshold and higher critical laser scanning speed, due to the high absorption of AuNRs at 780 nm, which enhanced the photo-sensitivity of the photoresist. Therefore, a shorter printing time can be achieved for the AuNR/LCM photoresist.

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Steinhardt, Rachel C., Timothy McCormick Steeves, Brooke Marjorie Wallace, Brittany Moser, Dmitry A. Fishman, and Aaron P. Esser-Kahn. "Photothermal Nanoparticle Initiation Enables Radical Polymerization and Yields Unique, Uniform Microfibers with Broad Spectrum Light." ACS Applied Materials & Interfaces 9, no. 44 (October 24, 2017): 39034–39. http://dx.doi.org/10.1021/acsami.7b12230.

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Zhang, Xue, Zhenjun Si, Yanbing Wang, Yanhui Li, Caina Xu, and Huayu Tian. "Polymerization and coordination synergistically constructed photothermal agents for macrophages-mediated tumor targeting diagnosis and therapy." Biomaterials 264 (January 2021): 120382. http://dx.doi.org/10.1016/j.biomaterials.2020.120382.

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SOYSAL, Furkan, and Zafer ÇIPLAK. "Synthesis and Photothermal Performance of Graphene Oxide/Gold/Polyaniline Nanocomposites via Simultaneous Precipitation/Polymerization Methods." Afyon Kocatepe University Journal of Sciences and Engineering 23, no. 5 (October 27, 2023): 1246–55. http://dx.doi.org/10.35414/akufemubid.1252385.

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Bu çalışmada, grafen oksit (GO) üzerinde tek basamakta altın tuzunun (HAuCl4) indirgenmesi ve anilin monomerinin polimerize edilmesiyle GO/Au/Polianilin (PANI) nanokompozitleri faklı bileşimlerde sentezlenmiş, karakterize edilmiş ve 808 nm dalgaboyuna sahip bir lazer ile fototermal özellikleri incelenmiştir. 1.5 W/cm2 lazer güç yoğunluğunda 0.1 mg/mL derişime sahip nanokompozit dispersiyonları arasında 10 dakikalık ısıtma işlemi sonucunda ulaşılan en yüksek sıcaklık GO1-Au-PANI4 nanokompozitinde 62.6 °C, en yüksek fototermal dönüşüm verimi ise 0.384 olmuştur. Bu nanokompozit üzerinde tekrarlı ısıtma soğutma deneyleri gerçekleştirilmiş ve ulaşılan en yüksek sıcaklıkta kayda değer bir değişiklik gözlenmemiştir. GO/Au/PANI nanokompozitinin tek basamaklı kolay sentez yöntemi ve yüksek fototermal performansı ile umut verici bir fotoajan olduğu tespit edilmiştir.

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Gachet, Benoit, Maxime Lecompère, Céline Croutxé-Barghorn, Dominique Burr, Gildas L'Hostis, and Xavier Allonas. "Highly reactive photothermal initiating system based on sulfonium salts for the photoinduced thermal frontal cationic polymerization of epoxides: a way to create carbon-fiber reinforced polymers." RSC Advances 10, no. 68 (2020): 41915–20. http://dx.doi.org/10.1039/d0ra07561b.

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Caron, Aurore, Frédéric Dumur, and Jacques Lalevée. "Near‐infrared ‐induced photothermal decomposition of charge transfer complexes: A new way to initiate thermal polymerization." Journal of Polymer Science 58, no. 15 (July 16, 2020): 2134–39. http://dx.doi.org/10.1002/pol.20200320.

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Barbero, Cesar A. "Functional Materials Made by Combining Hydrogels (Cross-Linked Polyacrylamides) and Conducting Polymers (Polyanilines)—A Critical Review." Polymers 15, no. 10 (May 9, 2023): 2240. http://dx.doi.org/10.3390/polym15102240.

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Hydrogels made of cross-linked polyacrlyamides (cPAM) and conducting materials made of polyanilines (PANIs) are both the most widely used materials in each category. This is due to their accessible monomers, easy synthesis and excellent properties. Therefore, the combination of these materials produces composites which show enhanced properties and also synergy between the cPAM properties (e.g., elasticity) and those of PANIs (e.g., conductivity). The most common way to produce the composites is to form the gel by radical polymerization (usually by redox initiators) then incorporate the PANIs into the network by oxidative polymerization of anilines. It is often claimed that the product is a semi-interpenetrated network (s-IPN) made of linear PANIs penetrating the cPAM network. However, there is evidence that the nanopores of the hydrogel become filled with PANIs nanoparticles, producing a composite. On the other hand, swelling the cPAM in true solutions of PANIs macromolecules renders s-IPN with different properties. Technological applications of the composites have been developed, such as photothermal (PTA)/electromechanical actuators, supercapacitors, movement/pressure sensors, etc. PTA devices rely on the absorption of electromagnetic radiation (light, microwaves, radiofrequency) by PANIs, which heats up the composite, triggering the phase transition of a thermosensitive cPAM. Therefore, the synergy of properties of both polymers is beneficial.

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Wu, Qijun, Chao Ma, Lian Chen, Ye Sun, Xianshuo Wei, Chunxin Ma, Hongliang Zhao, et al. "A Tissue Paper/Hydrogel Composite Light-Responsive Biomimetic Actuator Fabricated by In Situ Polymerization." Polymers 14, no. 24 (December 13, 2022): 5454. http://dx.doi.org/10.3390/polym14245454.

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Stimulus-responsive hydrogels are an important member of smart materials owing to their reversibility, soft/wet properties, and biocompatibility, which have a wide range of applications in the field of intelligent actuations. However, poor mechanical property and complicated fabrication process limit their further applications. Herein, we report a light-responsive tissue paper/hydrogel composite actuator which was developed by combining inkjet-printed tissue paper with poly(N-isopropylacrylamide) (PNIPAM) hydrogel through simple in situ polymerization. Due to the high strength of natural tissue paper and the strong interaction within the interface of the bilayer structure, the mechanical property of the composite actuator was highly enhanced, reaching 1.2 MPa of tensile strength. Furthermore, the light-responsive actuation of remote manipulation can be achieved because of the stamping graphite with high efficiency of photothermal conversion. Most importantly, we also made a few remotely controlled biomimetic actuating devices based on the near-infrared (NIR) light response of this composite actuator. This work provides a simple strategy for the construction of biomimetic anisotropic actuators and will inspire the exploration of new intelligent materials.

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Meng, Jian, Qian Wang, Shilei Ren, Lei Wang, and Ruiping Zhang. "Preparation of composite nanoprobe PB/CS by in-situ catalytic polymerization and study on its photothermal performance." Materials Letters 309 (February 2022): 131400. http://dx.doi.org/10.1016/j.matlet.2021.131400.

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Wei, Zhou, Naila Arshad, Muhammad Sultan Irshad, Muhammad Idrees, Iftikhar Ahmed, Hongrong Li, Hummad Habib Qazi, Muhammad Yousaf, Lina Abdullah Alshahrani, and Yuzheng Lu. "A Scalable Prototype by In Situ Polymerization of Biodegradables, Cross-Linked Molecular Mode of Vapor Transport, and Metal Ion Rejection for Solar-Driven Seawater Desalination." Crystals 11, no. 12 (December 1, 2021): 1489. http://dx.doi.org/10.3390/cryst11121489.

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Water scarcity in mass populated areas has become a major global threat to the survival and sustainability of community life on earth, which needs the prompt attention of technological leadership. Solar evaporation has emerged as a renewable energy resource and a novel technique for clean water production and wastewater treatment. Indeed, mounting a scalable solar evaporator including high evaporation efficiency and thermal management remains a significant challenge. Herein, we demonstrate a self-floatable, ecofriendly polypyrrole/wood sponge-based (PPy@WS) steam generator. The low-cost and easy to fabricate evaporator system consists of a single-step in situ polymerization of a 2-D (two-dimensional) hydrophilic wood sponge abundantly available for commercialization. The as-prepared PPy@WS solar evaporator exhibits excellent wettability and is super hydrophilic (contact angle ∼ 0), salt-resistant, and has an excellent light absorption of ∼94% due to omnidirectional diffusion reflection in PPy Nanoparticles (NPs). The capacity of the PPy@WS evaporator to absorb broadband solar radiation and convert it into thermal energy has enabled it to achieve excellent surface temperature (38.6 °C). The accumulated heat can generate vapors at the rate of 1.62 kg·m−2·h−1 along with 93% photothermal conversion efficiency under one sun (1 kW·m−2). Moreover, the presented prototype possesses the capability to be installed directly without the use of any complex protocol to purify seawater or sewage with an efficient rejection ratio of primary metal ions present in seawater (approximately 100%). This simple fabrication process with renewable polymer resources and photothermal materials can serve as a practical model towards high-performance solar evaporation technology for water-stressed communities in remote areas.

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Zhang, Di, Xianrui Chen, Nitong Bu, Liying Huang, Huanglong Lin, Lizhen Zhou, Ruojun Mu, Lin Wang, and Jie Pang. "Biosynthesis of Quercetin-Loaded Melanin Nanoparticles for Improved Antioxidant Activity, Photothermal Antimicrobial, and NIR/pH Dual-Responsive Drug Release." Foods 12, no. 23 (November 23, 2023): 4232. http://dx.doi.org/10.3390/foods12234232.

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Quercetin (QCT) is a promising dose-dependent nutraceutical that usually suffers from poor water solubility and low bioavailability issues. In this work, a novel QCT-loaded nanoscale delivery system was constructed based on the oxidative self-polymerization of melanin (Q@MNPs). The FT-IR, XRD, and Zeta potential analyses confirmed that QCT was successfully absorbed on the melanin nanoparticles (MNPs) via Π−Π and hydrogen bonding interactions. The encapsulation efficiency and particle size of Q@MNPs were 43.78% and 26.68 nm, respectively. Q@MNPs improved the thermal stability of QCT and the antioxidant properties in comparison to MNPs. Meanwhile, Q@MNPs presented fantastic photothermal conversion capacity and stability triggered by the NIR laser, which significantly enhanced the antibacterial capability with a sterilization rate of more than 98% against E. coli and S. aureus. More importantly, Q@MNPs exhibited NIR/pH dual-responsive drug release behavior and good biocompatibility (at concentrations of < 100 μg/mL). Thus, Q@MNPs show promising prospects for flavonoid delivery.

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Mokbel, Haifaa, Guillaume Noirbent, Didier Gigmes, Frédéric Dumur, and Jacques Lalevée. "Towards new NIR dyes for free radical photopolymerization processes." Beilstein Journal of Organic Chemistry 17 (August 16, 2021): 2067–76. http://dx.doi.org/10.3762/bjoc.17.133.

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The use of cheap and safe near-infrared (NIR) light is still the subject of intense research efforts but remains a huge challenge due to the associated low photon energy (wavelength from 0.78 to 2.5 µm). In this study, a series of 17 NIR dyes mainly based on a well-established cyanine scaffold is proposed. Remarkably, 11 of them were never synthesized before. Markedly, noncharged structures, negatively charged cyanine bearing Na+ as counter cation, and positively charged cyanines bearing (B(Ph)4−) or (I−) as counter anions were examined as promising NIR light photoinitiating systems. Excellent photoinitiating abilities were found for some reported dyes when used in combination with iodonium salt and amine. Markedly, photothermal effects with a huge heater behavior were also observed for different NIR dye structures. Interestingly, the synthesis of interpenetrating polymer networks (IPNs, e.g., for the polymerization of acrylate/epoxy monomer blends) can also be carried out upon NIR light with the proposed systems.

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Hou, Guodong, Feiyu Zhang, and Xiaoshi Qian. "Robust actuator based on photothermally responsive hydrogel with fast recovery capability." Journal of Physics: Conference Series 2491, no. 1 (April 1, 2023): 012013. http://dx.doi.org/10.1088/1742-6596/2491/1/012013.

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Abstract Propulsion by deformation and oscillation is a familiar law of motion in nature. Often, these motions are signaled and driven by constant external conditions, such as the phototropism of plants. Here, we have prepared a soft photosensitive material utilizing ice templates and cryo-polymerization, which combines light absorbers and thermally responsive hydrogels and thus possesses superb photothermal conversion, mechanical deformation, and fast recovery capabilities. The soft actuator based on this material generates a dynamically balanced oscillation with intermittent shadows creating a continuous self-feedback loop, allowing the actuator to operate continuously and durably under constant illumination. Combining the modules of conjugate heat transfer, non-isothermal flow, and fluid-solid coupling, we have gained a deeper understanding of the interaction of the soft actuator with the temperature and flow fields. In the future, the soft actuator can be widely developed and combined with other conventional drive strategies in an attempt to apply in soft robotics, underwater operations, and other fields.

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Reyes-Mateo, Kevin, Jordi Marquet Cortes, Jordi Hernando, and Rosa-Maria Sebastian. "Photothermal polymerization of benzoxazines." Polymer Chemistry, 2022. http://dx.doi.org/10.1039/d2py00635a.

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Despite the use of catalysts and initiators, high polymerization temperatures are typically required for polybenzoxazines, a severe constraint for their general application as high performance thermosets. In this work we...

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Lee, Chaewon, Jin Hyeok Park, Mina Kim, Jong Sik Kim, and Tae Soup Shim. "Fabrication of Tunable Photothermal Actuator via In-Situ Oxidative Polymerization of Polydopamine Nanoparticles in Hydrogel Bilayers." Soft Matter, 2022. http://dx.doi.org/10.1039/d2sm00420h.

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Photothermally triggered actuation enables the remote and local control of a material. The complex actuation can be achieved by controlling the photothermal efficiency of the material, which is crucial for...

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