Articles de revues : « Inorganic Quantum Dots »

1

Mitch Jacoby. « Superbright quantum dots with inorganic caps ». C&EN Global Enterprise 101, n^o 5 (6 février 2023) : 6. http://dx.doi.org/10.1021/cen-10105-scicon4.

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Zunger, Alex. « Semiconductor Quantum Dots ». MRS Bulletin 23, n^o 2 (février 1998) : 15–17. http://dx.doi.org/10.1557/s0883769400031213.

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Semiconductor “quantum dots” refer to nanometer-sized, giant (103–105 atoms) molecules made from ordinary inorganic semiconductor materials such as Si, InP, CdSe, etc. They are larger than the traditional “molecular clusters” (~1 nanometer containing ≤100 atoms) common in chemistry yet smaller than the structures of the order of a micron, manufactured by current electronic-industry lithographic techniques. Quantum dots can be made by colloidal chemistry techniques (see the articles by Alivisatos and by Nozik and Mićić in this issue), by controlled coarsening during epitaxial growth (see the article by Bimberg et al. in this issue), by size fluctuations in conventional quantum wells (see the article by Gammon in this issue), or via nano-fabrication (see the article by Tarucha in this issue).

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Chawre, Yogyata, Lakshita Dewangan, Ankita Beena Kujur, Indrapal Karbhal, Rekha Nagwanshi, Vishal Jain et Manmohan L. Satnami. « Quantum Dots and Nanohybrids and their Various Applications : A Review ». Journal of Ravishankar University (PART-B) 35, n^o 1 (8 mars 2022) : 53–86. http://dx.doi.org/10.52228/jrub.2022-35-1-7.

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Organic/inorganic nanohybrids and quantum dots have attracted widespread interest due to their favorable properties and promising applications. Great efforts have been made to design and fabricate versatile nanohybrids. Processing structure-properties-performance relationships are reviewed for compound quantum dots. In this review, various methods for synthesizing quantum dots as well as their resulting properties are discussed. This review focuses on the design, properties, sensing as well as energy applications of organic/inorganic nanohybrids as well as quantum dots. In this article, strategies for the fabrication, properties, functions, characterization techniques, various synthesis strategies and application of nanohybrids and quantum dots are briefly deliberated.

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Gao, Ge, Qiaoyue Xi, Hua Zhou, Yongxia Zhao, Cunqi Wu, Lidan Wang, Pengran Guo et Jingwei Xu. « Novel inorganic perovskite quantum dots for photocatalysis ». Nanoscale 9, n^o 33 (2017) : 12032–38. http://dx.doi.org/10.1039/c7nr04421f.

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Uniform CsPbX₃ quantum dots were synthesized via an emulsion fabrication and demulsion method at room temperature. The as-prepared CsPbX₃ QDs exhibit high synthetic yield and highly uniform morphology, as well as excellent photocatalytic activity toward the degradation of MO.

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GENG Wei-dong, 耿卫东, 郭嘉 GUO Jia, 唐静 TANG Jing et 刘会刚 LIU Hui-gang. « All-inorganic colloidal quantum dots display technology ». Chinese Journal of Liquid Crystals and Displays 29, n^o 4 (2014) : 479–84. http://dx.doi.org/10.3788/yjyxs20142904.0479.

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Xu, Yuanhong, Xiaoxia Wang, Wen Ling Zhang, Fan Lv et Shaojun Guo. « Recent progress in two-dimensional inorganic quantum dots ». Chemical Society Reviews 47, n^o 2 (2018) : 586–625. http://dx.doi.org/10.1039/c7cs00500h.

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Lobnik, Aleksandra, Špela Korent Urek et Matejka Turel. « Quantum Dots Based Optical Sensors ». Defect and Diffusion Forum 326-328 (avril 2012) : 682–89. http://dx.doi.org/10.4028/www.scientific.net/ddf.326-328.682.

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Luminescent sensors are chemical systems that can deliver information on the presence of selected analytes through the variations in their luminescence emission. With the advent of luminescent nanoparticles several new applications in the field of chemical sensing were explored. Among them, quantum dots (QD) represent inorganic semiconductor nanocrystals that are advantageous over conventional organic dyes from many different points of view. In this short review, the optical detection of various analytes using QD-based probes/sensors is presented and significant sensors characteristics are discussed. The biosensing approaches are not included in this article.

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Li, Teng, Xinru Liu, Kai Wang et Zhengguo Zhang. « Preparation and Properties of Inorganic Perovskite Quantum Dots ». IOP Conference Series : Earth and Environmental Science 300 (9 août 2019) : 022123. http://dx.doi.org/10.1088/1755-1315/300/2/022123.

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Engelmann, A., V. I. Yudson et P. Reineker. « Hybrid excitons in organic-inorganic semiconducting quantum dots ». Journal of Luminescence 76-77 (février 1998) : 214–16. http://dx.doi.org/10.1016/s0022-2313(97)00203-2.

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Pradeep, K. R., Saptarshi Chakraborty et Ranjani Viswanatha. « Stability of Sn based inorganic perovskite quantum dots ». Materials Research Express 6, n^o 11 (6 novembre 2019) : 114004. http://dx.doi.org/10.1088/2053-1591/ab5121.

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Semenza, Paul. « Can MicroLEDs and Quantum Dots Revitalize Inorganic Displays ? » Information Display 34, n^o 6 (novembre 2018) : 23–26. http://dx.doi.org/10.1002/j.2637-496x.2018.tb01135.x.

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Li, Zhen, Qiao Sun, Yian Zhu, Bien Tan, Zhi Ping Xu et Shi Xue Dou. « Ultra-small fluorescent inorganic nanoparticles for bioimaging ». J. Mater. Chem. B 2, n^o 19 (2014) : 2793–818. http://dx.doi.org/10.1039/c3tb21760d.

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The recent advances of ultra-small fluorescence inorganic nanoparticles including quantum dots, metal nanoclusters, carbon and graphene dots, up-conversion nanocrystals, and silicon nanoparticles have been comprehensively reviewed.

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Gomase, Amol, Sagar Sangale, Akshay Mundhe, Pravin Gadakh et Vikrant Nikam. « Quantum Dots : Method of Preparation and Biological Application ». Journal of Drug Delivery and Therapeutics 9, n^o 4-s (15 août 2019) : 670–72. http://dx.doi.org/10.22270/jddt.v9i4-s.3333.

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Quantum dots are inorganic semiconductor crystal of nanometer size which having distinctive conductive property depend on its size & shape. After administration of quantum dots parentally they identify target and bound them. Also quantum dots having light emitting property depend on size & shape. Quantum dots are prepared by chemical synthesis method include both organic & water phase synthesis & also by top- bottom approach. Tumor cell targeting & detection of pathogen & toxin are the main application of quantum dots & also in targeting drug delivery system. This review provides the overview of method of preparation of quantum dots & its biological application. Keywords: Quantum dot, targeting drug delivery, biological application

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Ridene, Rym, Nouha Mastrour, Dhouha Gamra et Habib Bouchriha. « Energetic behavior of excitons in hybrid organic–inorganic parabolic quantum dots and its electric field dependence ». International Journal of Modern Physics B 29, n^o 30 (18 novembre 2015) : 1550211. http://dx.doi.org/10.1142/s0217979215502112.

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In this paper, dispersion energies of Wannier–Mott, Frenkel and mixed exciton formation at the interface in nanocomposite organic–inorganic parabolic quantum dots are investigated theoretically taking account of the interaction between the two excitonic states and electric field effect. Illustration is given for three nanocomposites highly studied experimentally, such as organic P3HT combined respectively with inorganic (CdSe, ZnSe, ZnO) parabolic quantum dots. It is shown that the parameter governing the interaction between the individual exciton states depends on the inorganic quantum dot and can be controlled by the electric field. The results are consistent with the available experimental data.

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Song, Meng Meng, Wen Juan Guo, Zhao Dai, Kai Li Qiu et Jun Fu Wei. « Inorganic Nanoparticles Modified Molecular Beacons as Fluorescent DNA Biosensors ». Applied Mechanics and Materials 372 (août 2013) : 111–14. http://dx.doi.org/10.4028/www.scientific.net/amm.372.111.

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This study reports inorganic nanoparticles modified molecular beacons as fluorescent DNA biosensors. MBs were modified by using CdTe quantum dots as energy donors and 4-(4'-(dimethylamino) phenylazo) benzoic acid, black hole quencher 1 and Au nanoparticles as energy acceptors, respectively. CdTe quantum dots were linked to molecular beacons when 1-ethyl-3-(3-dimethylaminopropyl) carbodi-imide hydrochloride was added. The fluorescence intensity of the modified molecular beacons decreased tremendously compared to the fluorescence intensity of CdTe quantum dots, which indicated that the fluorescence resonance energy transfer occurred between the donors and acceptors. The results indicated that this type of molecular beacons has high specificity and can be used to distinguish complementary DNA and its mutants.

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Deng, Wei, Huan Fang, Xiangcheng Jin, Xiujuan Zhang, Xiaohong Zhang et Jiansheng Jie. « Organic–inorganic hybrid perovskite quantum dots for light-emitting diodes ». Journal of Materials Chemistry C 6, n^o 18 (2018) : 4831–41. http://dx.doi.org/10.1039/c8tc01214h.

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Organic–inorganic hybrid perovskite (CH₃NH₃PbX₃, X = Cl, Br, or I) quantum dots with superior optoelectronic properties, including bright, colour-tunable, narrow-band photoluminescence and high photoluminescence quantum efficiency, are regarded as ideal materials for next-generation displays.

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Kim, Joong Hyun, Dimitrios Morikis et Mihrimah Ozkan. « Adaptation of inorganic quantum dots for stable molecular beacons ». Sensors and Actuators B : Chemical 102, n^o 2 (septembre 2004) : 315–19. http://dx.doi.org/10.1016/j.snb.2004.04.107.

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Ghosh et Shirahata. « All-Inorganic Red-Light Emitting Diodes Based on Silicon Quantum Dots ». Crystals 9, n^o 8 (26 juillet 2019) : 385. http://dx.doi.org/10.3390/cryst9080385.

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We report herein an all-inorganic quantum dot light emitting diode (QLED) where an optically active layer of crystalline silicon (Si) is mounted. The prototype Si-QLED has an inverted device architecture of ITO/ZnO/QD/WO3/Al multilayer, which was prepared by a facile solution process. The QLED shows a red electroluminescence, an external quantum efficiency (EQE) of 0.25%, and luminance of 1400 cd/m2. The device performance stability has been investigated when the device faces different humidity conditions without any encapsulation. The advantage of using all inorganic layers is reflected in stable EQE even after prolonged exposure to harsh conditions.

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Loukanov, Alexandre Roumenov, Hristo Stefanov Gagov, Milena Yankova Mishonova et Seiichiro Nakabayashi. « Biocompatible Carbon Nanodots for Functional Imaging and Cancer Therapy ». International Journal of Biomedical and Clinical Engineering 7, n^o 2 (juillet 2018) : 31–45. http://dx.doi.org/10.4018/ijbce.2018070103.

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This article describes how carbon quantum dots (C-dots) are tiny carbon nanoparticles (less than 10 nm in size) being envisaged to be used in bio-sensing, bio-imaging and drug delivery nanosystems. Their low toxicity and stable chemical properties make them suitable candidates for new types of fluorescent probe, which overcome the common drawbacks of previous fluorescent probes (organic dyes and inorganic quantum dots). In addition, fluorescent C-dots possess a rather strong ability to bind with other organic and inorganic molecules due to their abundant surface groups. For that reason, fluorescent C-dots can be manipulated via series of controllable chemical treatments in order to satisfy the demands in the photocatalytic, biochemical and chemical sensing, bio-imaging, drug delivery and enhanced cell targeting. In recent studies it was described the development of carbon quantum dots with large two-photon absorption cross sections towards two-photon imaging for use in photodynamic cancer therapy. Thus, C-dots have become a rising star in biomedical research with a promising future for the application in nanomedicine.

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de Boëver, Raphaël, Adam Langlois, Xu Li et Jerome P. Claverie. « Graphitic Dots Combining Photophysical Characteristics of Organic Molecular Fluorophores and Inorganic Quantum Dots ». JACS Au 1, n^o 6 (11 mai 2021) : 843–51. http://dx.doi.org/10.1021/jacsau.1c00055.

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Alam, Kazi, Pawan Kumar, Devika Laishram, Charles Jensen, Annabelle Degg, Narendra Chaulagain, Frank Hegmann, Tom Nilges, Rakesh Sharma et Karthik Shankar. « C3N4 and C3N5 Nanosheets As Passivation Layers and Carrier Extractors for Inorganic Semiconductor Nanowires and Quantum Dots ». ECS Meeting Abstracts MA2022-01, n^o 15 (7 juillet 2022) : 2379. http://dx.doi.org/10.1149/ma2022-01152379mtgabs.

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Inorganic semiconductor nanowires and quantum dots made of chalcogenides, III-V semiconductors and halide perovskites offer exciting potential for optoelectronic devices. The orthogonalization possible in nanowires between the normally competing processes of charge generation and charge separation have been used to project very high operating performance exceeding that of thin films and single crystals in light harvesting devices such as solar cells, photodetectors, photocatalysts and photoelectrolyzers. Likewise, inorganic quantum dots with size-tunable absorption and emission spectra are excellent candidates for light emitting devices as well as light harvesting devices. However, the practical performance of inorganic nanowire based optoelectronic devices has significantly lagged theoretical predictions. A major reason for the discrepancy between theory and experiment is the presence of surface traps and defects in nanowires and quantum dots, which exhibit a large surface area to volume ratio. Several chemical treatments and annealing regimens have been employed to heal surface defects in nanowires and quantum dots. One popular strategy involves wrapping nanowires and/or quantum dots with a thin coating of a molecular monolayer (e.g. alkanethiols) or an atomic layer deposited conformal oxide. While such core-shell architectures are frequently effective in reducing surface defects, the surface passivation is invariably accompanied by a deterioration in optoelectronic properties due to the difficulty experienced by charge carriers in tunneling through the thin shell layer. The resulting trade-off between surface passivation and carrier extraction limits performance improvements in light harvesting devices. Thus there is a strong need for passivating layers that do not negatively impact carrier extraction. Herein, we show that graphitic carbon nitride coatings are highly effective in passivating the surfaces of inorganic nanowires and quantum dots while preserving excellent carrier transport and extraction. Three illustrative examples are provided together with in-depth spectroscopic and electrical characterization: (1) Cesium lead bromide (CsPbBr3) quantum dots passivated by g-C3N4 nanosheets and performing spectacularly as CO2 photoreduction catalysts and water-splitting photoanodes (2) The double helical ternary semiconductor SnIP passivated by g-C3N4 nanosheets which experienced a remarkable improvement in photoelectrochemical performance (3) Cadmium sulfide (CdS) nanowires passivated by C3N5 nanosheets resulting in a superior photocatalytic performance

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Kausar, Ayesha. « Polyaniline and quantum dot-based nanostructures : Developments and perspectives ». Journal of Plastic Film & ; Sheeting 36, n^o 4 (14 mai 2020) : 430–47. http://dx.doi.org/10.1177/8756087920926649.

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Quantum dots are 2–5 nm nanoparticles with exceptional optical, electronic, luminescence, and semiconducting properties. Polyaniline is an exclusive conjugated polymer. This article reviews recent efforts, scientific trials, and technological solicitations of the polyaniline/quantum dot-based nanocomposites. Polyaniline/quantum dot mixtures form a unique composition for advance materials and applications. Carbon dots, graphene quantum dots, and several inorganic quantum dots have been added to a conducting polymer. A functional quantum dot may develop electrostatic, van der Waal, and π–π stacking interactions with the conjugated polymer backbone. Uniform quantum dot dispersion in polyaniline may result in inimitable morphology, electrical conductivity, electrochemical properties, capacitance, and sensing features. Finally, this review expounds on the many applications for polyaniline/quantum dot nanocomposites including dye-sensitized solar cell, supercapacitor, electronics, gas sensor, biosensor, and bioimaging.

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Li, Chen Gui, Chao Ye, Jie Yu, Fang Zhou, Wen Ying Zhong, Zheng Yu Yan et Yu Zhu Hu. « Facile Synthesis of near-Infrared-Emitting Water-Dispersed CdHgTe/CdS/ZnS Core/Shell/Shell Quantum Dots ». Advanced Materials Research 535-537 (juin 2012) : 1417–20. http://dx.doi.org/10.4028/www.scientific.net/amr.535-537.1417.

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We report the synthesis and characterization of highly luminescent quantum dots consisting of CdHgTe cores protected with double inorganic shells (core−shell−shell quantum dots). The outer ZnS shell provides efficient confinement of electron and hole wave functions inside the quantum dots as well as high photochemical stability. Introducing the middle shell sandwiched between CdHgTe core and ZnS outer shell allows considerable reducing strain inside nanocrystals because CdS had the lattice parameter intermediate to those of CdHgTe and ZnS. Preferential growth of the middle CdS shell in one crystallographic direction allows engineering the shape and luminescence polarization of the core−shell−shell quantum dots.

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Shen, Kai, Xiao Li, Hao Xu, Mingqing Wang, Xiao Dai, Jian Guo, Ting Zhang et al. « Enhanced performance of ZnO nanoparticle decorated all-inorganic CsPbBr3 quantum dot photodetectors ». Journal of Materials Chemistry A 7, n^o 11 (2019) : 6134–42. http://dx.doi.org/10.1039/c9ta00230h.

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Li, Zhenxing, Chengcheng Yu, Yangyang Wen, Zhiting Wei, Junmei Chu, Xiaofei Xing, Xin Zhang, Mingliang Hu et Miao He. « MOF-Confined Sub-2 nm Stable CsPbX3 Perovskite Quantum Dots ». Nanomaterials 9, n^o 8 (10 août 2019) : 1147. http://dx.doi.org/10.3390/nano9081147.

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The metal halide with a perovskite structure has attracted significant attention due to its defect-tolerant photophysics and optoelectronic features. In particular, the all-inorganic metal halide perovskite quantum dots have potential for development in future applications. Sub-2 nm CsPbX3 (X = Cl, Br, and I) perovskite quantum dots were successfully fabricated by a MOF-confined strategy with a facile and simple route. The highly uniform microporous structure of MOF effectively restricted the CsPbX3 quantum dots aggregation in a synthetic process and endowed the obtained sub-2 nm CsPbX3 quantum dots with well-dispersed and excellent stability in ambient air without a capping agent. The photoluminescence emission spectra and lifetimes were not decayed after 60 days. The CsPbX3 quantum dots maintained size distribution stability in the air without any treatment. Because of the quantum confinement effect of CsPbX3 quantum dots, the absorption and photoluminescence (PL) emission peak were blue shifted to shorter wavelengths compare with bulk materials. Furthermore, this synthetic strategy provides a novel method in fabricating ultra-small photoluminescence quantum dots.

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Poddar, M., S. Khurana, S. Bose et R. Nayak. « Versatile semiconductor quantum dots : synthesis, bioconjugation strategies and application ». Archives of Materials Science and Engineering 121, n^o 1 (1 mai 2023) : 25–32. http://dx.doi.org/10.5604/01.3001.0053.7477.

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The present work aimed to synthesize organic and inorganic quantum dots (QDs) and discuss their bioconjugation strategies.We have prepared 3 different QDs, organic (Carbon [CQDs]) and inorganic (Cadmium Sulphide [CdS] and Zinc Mercury Selenide [ZnHgSe]) quantum dots (QDs) and bioconjugation through in-situ and ex-situ route. These QDs have been characterized through UV-Vis spectroscopy and photoluminescence (PL) emission spectra. Their surface functional groups have been identified through Fourier-transform infrared (FTIR) spectroscopy. The bioconjugated quantum dots were tested through PL emission shift, Agarose electrophoresis, and Bradford assay technique.Successful synthesized QDs, and their bioconjugation has been confirmed through the previously listed characterization techniques. There are distinct differences in their emission peak, FTIR spectroscopy, and Bradford assay, which confirms their successful bioconjugation.These bioconjugated QDs are difficult to filter from their unconjugated counterpart. Bioconjugation steps are extremely crucial.These QDs could be utilized for highly effective biolabelling and bioimaging in-vivo as well as in-vitro applications.The synthesis has been majorly modified, and the bioconjugation has been prepared in a novel method. There is limited reported work with this much description of the differences in conjugated and unconjugated QDs.

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Ren, Zhenwei, Juan Yu, Zhenxiao Pan, Jizheng Wang et Xinhua Zhong. « Inorganic Ligand Thiosulfate-Capped Quantum Dots for Efficient Quantum Dot Sensitized Solar Cells ». ACS Applied Materials & ; Interfaces 9, n^o 22 (24 mai 2017) : 18936–44. http://dx.doi.org/10.1021/acsami.7b03715.

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Huang, Dong, Zhuoyin Peng, Chengtang Long, Wen Luo, Yue Wang et Yilong Fu. « Inorganic iodide surface passivation on PbS quantum dots by one-step process for quantum dots sensitized solar cells ». Chemical Physics Letters 791 (mars 2022) : 139406. http://dx.doi.org/10.1016/j.cplett.2022.139406.

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Sosna-Głębska, Aleksandra, Natalia Szczecińska, Maciej Sibiński, Gabriela Wiosna-Sałyga et Bartłomiej Januszewicz. « Perovskite versus ZnCuInS/ZnS Luminescent Nanoparticles in Wavelength-Shifting Layers for Sensor Applications ». Sensors 21, n^o 9 (2 mai 2021) : 3165. http://dx.doi.org/10.3390/s21093165.

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In this work, the application of quantum dots is evaluated in order to sensitize the commercially popular Si detectors in the UV range. The wavelength-shifting properties of two types of all-inorganic halide perovskite quantum dots as well as ZnCuInS/ZnS quantum dots are determined in order to assess their potential in the effective enhancement of the sensors’ detection range. In a further part of the study, the wavelength-shifting layers are formed by embedding the quantum dots in two kinds of polymers: PMMA or Cyclic Olefin Polymer. The performance of the layers is evaluated by transmission and PLE measurement. Incorporating the nanoparticles seemingly increases the transmittance in the UV range by several percent. The observed phenomenon is proportional to the quantum dots to polymer concentration, which indicates the successful conversion action of the luminescent agents.

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Ge, Wanyin, Jindou Shi, Meimei Xu, Yuanting Wu, Hiroshi Sugimoto et Minoru Fujii. « Dual modulating luminescence in all-inorganic perovskite CsPbBr3 quantum dots ». Optical Materials 113 (mars 2021) : 110822. http://dx.doi.org/10.1016/j.optmat.2021.110822.

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LIU Wang-yu, 刘王宇, 陈. 斐. CHEN Fei, 孔淑祺 KONG Shu-qi et 唐爱伟 TANG Ai-wei. « Synthesis, Properties and Application of All-inorganic Perovskite Quantum Dots ». Chinese Journal of Luminescence 41, n^o 2 (2020) : 117–33. http://dx.doi.org/10.3788/fgxb20204102.0117.

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Wang, Haibin, Takaya Kubo et Hiroshi Segawa. « Organic/Inorganic Hybrid Solar Cells Based on Colloidal Quantum Dots ». Journal of the Japan Society of Colour Material 89, n^o 8 (2016) : 268–73. http://dx.doi.org/10.4011/shikizai.89.268.

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Li, Xia, Shaoqing Chen, Peng-Fei Liu, Yuelan Zhang, Yan Chen, Hsing-Lin Wang, Hongming Yuan et Shouhua Feng. « Evidence for Ferroelectricity of All-Inorganic Perovskite CsPbBr3 Quantum Dots ». Journal of the American Chemical Society 142, n^o 7 (31 janvier 2020) : 3316–20. http://dx.doi.org/10.1021/jacs.9b12254.

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Lin, Pengcheng, Qi Yan, Zhan Wei, Ying Chen, Fang Chen, Zhuoran Huang, Xiaoxin Li, Huiyuan Wang, Xuezhen Wang et Zhengdong Cheng. « All-inorganic perovskite quantum dots stabilized blue phase liquid crystals ». Optics Express 26, n^o 14 (2 juillet 2018) : 18310. http://dx.doi.org/10.1364/oe.26.018310.

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Wang, Hua, Ning Sui, Xue Bai, Yu Zhang, Quinton Rice, Felix Jaetae Seo, Qingbo Zhang, Vicki L. Colvin et William W. Yu. « Emission Recovery and Stability Enhancement of Inorganic Perovskite Quantum Dots ». Journal of Physical Chemistry Letters 9, n^o 15 (10 juillet 2018) : 4166–73. http://dx.doi.org/10.1021/acs.jpclett.8b01752.

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Colherinhas, Guilherme, Eudes Eterno Fileti et Vitaly V. Chaban. « Can inorganic salts tune electronic properties of graphene quantum dots ? » Physical Chemistry Chemical Physics 17, n^o 26 (2015) : 17413–20. http://dx.doi.org/10.1039/c5cp02083b.

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In this work, we apply density functional theory to study the effect of neutral ionic clusters adsorbed on the GQD surface. We conclude that both the HOMO and the LUMO of GQDs are very sensitive to the presence of ions and to their distance from the GQD surface. However, the alteration of the band gap itself is modest, as opposed to the case of free ions (recent reports). Our work fosters progress in modulating electronic properties of nanoscale carbonaceous materials.

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Rünzi, Thomas, Moritz C. Baier, Carla Negele, Marina Krumova et Stefan Mecking. « Nanocomposites of Phosphonic-Acid-Functionalized Polyethylenes with Inorganic Quantum Dots ». Macromolecular Rapid Communications 36, n^o 2 (3 novembre 2014) : 165–73. http://dx.doi.org/10.1002/marc.201400441.

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Grisorio, Roberto, Doriana Debellis, Gian Paolo Suranna, Giuseppe Gigli et Carlo Giansante. « The Dynamic Organic/Inorganic Interface of Colloidal PbS Quantum Dots ». Angewandte Chemie International Edition 55, n^o 23 (1 avril 2016) : 6628–33. http://dx.doi.org/10.1002/anie.201511174.

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Grisorio, Roberto, Doriana Debellis, Gian Paolo Suranna, Giuseppe Gigli et Carlo Giansante. « The Dynamic Organic/Inorganic Interface of Colloidal PbS Quantum Dots ». Angewandte Chemie 128, n^o 23 (1 avril 2016) : 6740–45. http://dx.doi.org/10.1002/ange.201511174.

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Kashyout, A. B., Hesham M. A. Soliman, Marwa Fathy, E. A. Gomaa et Ali A. Zidan. « CdSe Quantum Dots for Solar Cell Devices ». International Journal of Photoenergy 2012 (2012) : 1–7. http://dx.doi.org/10.1155/2012/952610.

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CdSe quantum dots have been prepared with different sizes and exploited as inorganic dye to sensitize a wide bandgap TiO2thin films for QDs solar cells. The synthesis is based on the pyrolysis of organometallic reagents by injection into a hot coordinating solvent. This provides temporally discrete nucleation and permits controlled growth of macroscopic quantities of nanocrystallites. XRD, HRTEM, UV-visible, and PL were used to characterize the synthesized quantum dots. The results showed CdSe quantum dots with sizes ranging from 3 nm to 6 nm which enabled the control of the optical properties and consequently the solar cell performance. Solar cell of 0.08% performance under solar irradiation with a light intensity of 100 mW/cm2has been obtained. CdSe/TiO2solar cells without and with using mercaptopropionic acid (MPA) as a linker between CdSe and TiO2particles despite aVocof 428 mV,Jscof 0.184 mAcm-2, FF of 0.57, andηof 0.05% but with linker despite aVocof 543 mV,Jscof 0.318 mAcm-2, FF of 0.48, andηof 0.08%, respectively.

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Melnikau, Dzmitry, Thomas Hendel, Pavel A. Linkov, Pavel S. Samokhvalov, Igor R. Nabiev et Yury P. Rakovich. « Energy Transfer Between Single Semiconductor Quantum Dots and Organic Dye Molecules ». Zeitschrift für Physikalische Chemie 232, n^o 9-11 (28 août 2018) : 1513–26. http://dx.doi.org/10.1515/zpch-2018-1144.

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Abstract An understanding of the mechanisms of energy transfer and conversion on the nanoscale is one of the key requirements for an implementation of highly efficient photonic nanodevices based on hybrid organic/inorganic nanomaterials. In this work we conduct steady-state and time resolved optical studies of the emission properties of an ensembles and single semiconductor quantum dots and attached organic dye molecules. We revealed that the luminescence intensity of a hybrid structure does not follow the blinking behavior of quantum dots. We also demonstrated an efficient single photon generation from single hybrid nanostructures which involves an energy transfer from donor to acceptor as main excitation source.

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Kitano, Keisuke, Seung Hyuk Lee, Sentaro Kida, Takahiro Doe, Yasushi Asaoka, Noboru Iwata, Makoto Izumi, Tetsu Tatsuma et Yasuhiko Arakawa. « 83‐2 : Inorganic ion treatment of Cd‐free quantum dots and applications to QD‐LED with improved characteristics ». SID Symposium Digest of Technical Papers 54, n^o 1 (juin 2023) : 1166–69. http://dx.doi.org/10.1002/sdtp.16782.

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Inorganic ion treatment for Cd‐free colloidal quantum dot (QD) layers improved their carrier injection efficiency, resulting in improved external quantum efficiency (EQE) and electroluminescence (EL) lifetime of the QD light‐emitting diode (QD‐LED). Inorganic ion treated QD layers patterned at 176 ppi by photolithography enabled emission of each primary color.

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Li, Ruxue, Zhipeng Wei, Haixia Zhao, Hongrui Yu, Xuan Fang, Dan Fang, Junzi Li, Tingchao He, Rui Chen et Xiaohua Wang. « Linear and nonlinear optical characteristics of all-inorganic perovskite CsPbBr3 quantum dots modified by hydrophobic zeolites ». Nanoscale 10, n^o 48 (2018) : 22766–74. http://dx.doi.org/10.1039/c8nr07256f.

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Heyn, Ch, et W. Hansen. « Desorption of InAs quantum dots ». Journal of Crystal Growth 251, n^o 1-4 (avril 2003) : 218–22. http://dx.doi.org/10.1016/s0022-0248(02)02379-5.

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Roßbach, R., M. Reischle, G. J. Beirne, H. Schweizer, M. Jetter et P. Michler. « Vertical asymmetric double quantum dots ». Journal of Crystal Growth 298 (janvier 2007) : 603–6. http://dx.doi.org/10.1016/j.jcrysgro.2006.10.146.

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Lien, Shui-Yang, Yu-Hao Chen, Wen-Ray Chen, Chuan-Hsi Liu et Chien-Jung Huang. « Effect of Growth Temperature on the Characteristics of CsPbI3-Quantum Dots Doped Perovskite Film ». Molecules 26, n^o 15 (23 juillet 2021) : 4439. http://dx.doi.org/10.3390/molecules26154439.

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In this study, adding CsPbI3 quantum dots to organic perovskite methylamine lead triiodide (CH3NH3PbI3) to form a doped perovskite film filmed by different temperatures was found to effectively reduce the formation of unsaturated metal Pb. Doping a small amount of CsPbI3 quantum dots could enhance thermal stability and improve surface defects. The electron mobility of the doped film was 2.5 times higher than the pristine film. This was a major breakthrough for inorganic quantum dot doped organic perovskite thin films.

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Li, Yuan, et Nitin Chopra. « Fabrication of nanoscale heterostructures comprised of graphene-encapsulated gold nanoparticles and semiconducting quantum dots for photocatalysis ». Physical Chemistry Chemical Physics 17, n^o 19 (2015) : 12881–93. http://dx.doi.org/10.1039/c5cp00928f.

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Muñoz, Raybel, Eva M. Santos, Carlos A. Galan-Vidal, Jose M. Miranda, Aroa Lopez-Santamarina et Jose A. Rodriguez. « Ternary Quantum Dots in Chemical Analysis. Synthesis and Detection Mechanisms ». Molecules 26, n^o 9 (8 mai 2021) : 2764. http://dx.doi.org/10.3390/molecules26092764.

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Ternary quantum dots (QDs) are novel nanomaterials that can be used in chemical analysis due their unique physicochemical and spectroscopic properties. These properties are size-dependent and can be adjusted in the synthetic protocol modifying the reaction medium, time, source of heat, and the ligand used for stabilization. In the last decade, several spectroscopic methods have been developed for the analysis of organic and inorganic analytes in biological, drug, environmental, and food samples, in which different sensing schemes have been applied using ternary quantum dots. This review addresses the different synthetic approaches of ternary quantum dots, the sensing mechanisms involved in the analyte detection, and the predominant areas in which these nanomaterials are used.

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O'Brien, Paul, Mohammad Azad Malik et Neerish Revaprasadu. « Precursor Routes to Semiconductor Quantum Dots ». Phosphorus, Sulfur, and Silicon and the Related Elements 180, n^o 3-4 (23 février 2005) : 689–712. http://dx.doi.org/10.1080/10426500590907426.

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Xu, Leimeng, Shichen Yuan, Le Ma, Baisong Zhang, Tao Fang, Xiansheng Li et Jizhong Song. « All-inorganic perovskite quantum dots as light-harvesting, interfacial, and light-converting layers toward solar cells ». Journal of Materials Chemistry A 9, n^o 35 (2021) : 18947–73. http://dx.doi.org/10.1039/d1ta02786g.

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