Academic literature on the topic 'Infrared nanocrystals'

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Journal articles on the topic "Infrared nanocrystals"

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Della Gaspera, Enrico, Noel W. Duffy, Joel van Embden, et al. "Plasmonic Ge-doped ZnO nanocrystals." Chemical Communications 51, no. 62 (2015): 12369–72. http://dx.doi.org/10.1039/c5cc02429c.

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SHUBERT, V. ALVIN, and STEVEN P. LEWIS. "SIZE-DEPENDENCE OF INFRARED SPECTRA IN NIOBIUM CARBIDE NANOCRYSTALS." International Journal of Modern Physics C 23, no. 08 (2012): 1240001. http://dx.doi.org/10.1142/s0129183112400013.

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Niobium carbide nanocrystals of ~1:1 stoichiometry have recently been observed for particle sizes ranging from Nb4C4 to Nb50C50 . Infrared (IR) spectroscopic measurements show that a new band of IR vibrational modes appears with increasing particle size at Nb9C9 . Using density-functional theory, we show that the vibrational modes in the new band involve structural features present only in nanocrystals with three or more atomic layers in every direction. The Nb9C9 nanocrystal is right at this structural threshold.
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Saez Cabezas, Camila A., Gary K. Ong, Ryan B. Jadrich, et al. "Gelation of plasmonic metal oxide nanocrystals by polymer-induced depletion attractions." Proceedings of the National Academy of Sciences 115, no. 36 (2018): 8925–30. http://dx.doi.org/10.1073/pnas.1806927115.

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Gelation of colloidal nanocrystals emerged as a strategy to preserve inherent nanoscale properties in multiscale architectures. However, available gelation methods to directly form self-supported nanocrystal networks struggle to reliably control nanoscale optical phenomena such as photoluminescence and localized surface plasmon resonance (LSPR) across nanocrystal systems due to processing variabilities. Here, we report on an alternative gelation method based on physical internanocrystal interactions: short-range depletion attractions balanced by long-range electrostatic repulsions. The latter
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Lhuillier, Emmanuel. "Narrow band gap nanocrystals for infrared cost-effective optoelectronics." Photoniques, no. 116 (2022): 54–57. http://dx.doi.org/10.1051/photon/202211654.

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Infrared optoelectronics is driven by epitaxially grown semiconductors and the introduction of alternative materials is often viewed with some suspicion until the newcomer has demonstrated a high degree of viability. Infrared nanocrystals have certainly reached this degree of maturity switching from the demonstration of absorption by chemists to their integration into increasingly complex systems. Here, we review some of the recent developments relative to the integration of nanocrystal devices in the 1-5 µm range.
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Li, Xinke, Fangtian You, Hongshang Peng, and Shihua Huang. "Synthesis and Near-Infrared Luminescent Properties of NaGdF4:Nd3+@NaGdF4 Core/Shell Nanocrystals with Different Shell Thickness." Journal of Nanoscience and Nanotechnology 16, no. 4 (2016): 3940–44. http://dx.doi.org/10.1166/jnn.2016.11818.

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The near-infrared to near-infrared (NIR-to-NIR) photoluminescence of nanocrystals has outstanding advantages in biological imaging. NaGdF4:Nd3+ core nanocrystals and NaGdF4:Nd3+@NaGdF4 core/shell nanocrystals with different shell thicknesses were synthesized by a simple solvothermal method. The obtained nanocrystals were characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD) analysis. The phase of all nanocrystals is hexagonal. NaGdF4:Nd3+ core nanocrystals have an average size of 6 nm. By controlling core–shell ratio for 1:2 and 1:3, we obtained NaGdF4:Nd3+@NaGdF4
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Ницук, Ю. А., М. И. Киосе, Ю. Ф. Ваксман, В. А. Смынтына та И. Р. Яцунский. "Оптические свойства нанокристаллов CdS, легированных цинком и медью". Физика и техника полупроводников 53, № 3 (2019): 381. http://dx.doi.org/10.21883/ftp.2019.03.47291.8982.

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AbstractCadmium-sulfide nanocrystals are produced by the colloidal method. Doping with zinc and copper is conducted during nanocrystal growth. The optical absorption and photoluminescence spectra are studied. The maximum concentration of the optically active copper impurity is determined from a shift of the fundamental absorption edge to lower energies. It is shown that the long-wavelength luminescence of CdS and CdS:Zn nanocrystals is defined by optical transitions at donor–acceptor pairs. In CdS:Cu nanocrystals, optical absorption and photoluminescence in the visible spectral region are defi
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Zhang, Xinhai, Qiuling Chen, and Shouhua Zhang. "Ta2O5 Nanocrystals Strengthened Mechanical, Magnetic, and Radiation Shielding Properties of Heavy Metal Oxide Glass." Molecules 26, no. 15 (2021): 4494. http://dx.doi.org/10.3390/molecules26154494.

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In this study, for the first time, diamagnetic 5d0 Ta5+ ions and Ta2O5 nanocrystals were utilized to enhance the structural, mechanical, magnetic, and radiation shielding of heavy metal oxide glasses. Transparent Ta2O5 nanocrystal-doped heavy metal oxide glasses were obtained, and the embedded Ta2O5 nanocrystals had sizes ranging from 20 to 30 nm. The structural analysis of the Ta2O5 nanocrystal displays the transformation from hexagonal to orthorhombic Ta2O5. Structures of doped glasses were studied through X-ray diffraction and infrared and Raman spectra, which reveal that Ta2O5 exists in hi
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Chen, Yi Chuan, Yue Hui Hu, Xiao Hua Zhang, et al. "Structure and Properties of Doped ZnO Nanopowders Synthesized by Methanol Alcoholysis Method." Advanced Materials Research 287-290 (July 2011): 1406–11. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.1406.

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Pured ZnO, Al doped ZnO and Al-In co-doped ZnO nanopowders were synthesized by the methanol alcoholysis method at 130 °C. Structure, morphology and optical properties of ZnO nanopowders were characterized using X-ray diffraction, Transmission electron microscopy (TEM), Fourier transform infrared (FTIR) and Photoluminescence (PL) spectra. The results show that ZnO nanopowders can be obtained in methanol solution at low temperature (130 °C). TEM images show that Al doped ZnO nanocrystals grow along the [002] axis quicker than other axes. FTIR spectra show that ZnO nanocrystals synthesized by the
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Feng, Bin, Feng Teng, Ai-Wei Tang, Yan Wang, Yan-Bing Hou, and Yong-Sheng Wang. "Synthesis and Optical Properties of L-Cysteine Hydrochloride-Stabilized CdSe Nanocrystals in a New Alkali System." Journal of Nanoscience and Nanotechnology 8, no. 3 (2008): 1178–82. http://dx.doi.org/10.1166/jnn.2008.18168.

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Water-soluble CdSe nanocrystals were synthesized in a new alkali system at lower temperatures by using L-cysteine hydrochloride as a stabilizer and Na2SeSO3 as a selenium source to enable the synthesis of CdSe nanocrystals in a wider range of pHvalues. The CdSe nanocrystal powder was characterized by X-ray powder diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and transmission electron microscopy. We systematically investigated the effect of synthesis conditions on the optical properties of the L-cysteine hydrochloride-stabilized CdSe nanocrystals, and f
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Fermi, Andrea, Mirko Locritani, Gabriele Di Carlo, et al. "Light-harvesting antennae based on photoactive silicon nanocrystals functionalized with porphyrin chromophores." Faraday Discussions 185 (2015): 481–95. http://dx.doi.org/10.1039/c5fd00098j.

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Silicon nanocrystals functionalized with tetraphenylporphyrin Zn(ii) chromophores at the periphery perform as light harvesting antennae: excitation of the porphyrin units in the visible spectral region yields sensitized emission of the silicon nanocrystal core in the near infrared with a long lifetime (λ<sub>max</sub>= 905 nm,τ= 130 μs). This result demonstrates that this hybrid material has a potential application as a luminescent probe for bioimaging.
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Dissertations / Theses on the topic "Infrared nanocrystals"

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Geyer, Scott Mitchell. "Science and applications of infrared semiconductor nanocrystals." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/62053.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2010.<br>Vita. Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 149-158).<br>In this work we study several applications of semiconductor nanocrystals (NCs) with infrared band gaps. In the first half, we explore the physics of two systems with applications in NC based photovoltaics. The physics of mixed films of CdTe and CdSe NCs is studied in chapter 2 as a model for NC based bulk heterojunction photovoltaics. We demonstrate that the presence of an active electron trap on the CdTe dramat
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Liyanage, Geethika Kaushalya. "Infrared Emitting PbS Nanocrystals through Matrix Encapsulation." Bowling Green State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1403953924.

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Kriegel, Ilka. "Near-infrared plasmonics with vacancy doped semiconductor nanocrystals." Diss., Ludwig-Maximilians-Universität München, 2013. http://nbn-resolving.de/urn:nbn:de:bvb:19-164558.

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Plasmonics with heavily doped semiconductor nanocrystals (NCs) is an emerging field in NC science. However, impurity doping of NCs remains far from trivial and is, as yet, dominated by a low chemical control over the incorporated dopant atoms. An appealing alternative is vacancy doping, where the formation of vacancies in the structure is responsible for an increased carrier density and elegantly circumvents the issues related to impurity doping. Due to high carrier densities of around 10^21cm^(-3) localized surface plasmon resonances (LSPRs) in the near infrared (NIR) are expected, and as suc
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Zhang, Huichen. "Colloidal nanocrystals for optoelectronics from visible to short-wave infrared." Electronic Thesis or Diss., Sorbonne université, 2025. http://www.theses.fr/2025SORUS101.

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Les nanocristaux semi-conducteurs colloïdaux constituent une plateforme prometteuse pour les applications optoélectroniques, grâce à leur gap énergétique dépendant de la taille, leur synthèse peu coûteuse et leur traitement en solution. Ces propriétés ont permis leur intégration dans des dispositifs tels que les diodes électroluminescentes (LED), les photodétecteurs et les cellules solaires, avec un succès commercial notable dans les technologies d'affichage et d'imagerie. Cette thèse explore leur potentiel dans le spectre allant du visible à l'infrarouge à ondes courtes (SWIR), en mettant l'a
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Panthani, Matthew George. "Colloidal Nanocrystals with Near-infrared Optical Properties| Synthesis, Characterization, and Applications." Thesis, The University of Texas at Austin, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3572875.

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<p> Colloidal nanocrystals with optical properties in the near-infrared (NIR) are of interest for many applications such as photovoltaic (PV) energy conversion, bioimaging, and therapeutics. For PVs and other electronic devices, challenges in using colloidal nanomaterials often deal with the surfaces. Because of the high surface-to-volume ratio of small nanocrystals, surfaces and interfaces play an enhanced role in the properties of nanocrystal films and devices. </p><p> Organic ligand-capped CuInSe<sub>2</sub> (CIS) and Cu(In<sub>X</sub>Ga<sub> 1-X</sub>)Se2 (CIGS) nanocrystals were synthes
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Lox, Josephine F. L., Zhiya Dang, Volodymyr Dzhagan, et al. "Near-Infrared Cu-In-Se-Based Colloidal Nanocrystals via Cation Exchange." ACS Publications, 2019. https://tud.qucosa.de/id/qucosa%3A36557.

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We developed a three-step colloidal synthesis of near-infrared active Cu-In-Se (CISe)/ZnS core/shell nanocrystals (NCs) via a sequential partial cation exchange. In the first step binary highly copper deficient Cu2‒xSe NCs were synthesized, followed by a partial cation exchange of copper to indium ions yielding CISe NCs. In order to enhance the stability and the photoluminescence (PL) properties of the NCs, a subsequent ZnS shell was grown, resulting in CISe/ZnS core/shell NCs. These core/shell hetero-NCs exhibited a dramatic increase in size and a restructuring to trigonal pyramidal particles
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Xiang, Hengyang. "Colloidal nanocrystals applied for short-wave infrared photodetectors with fast response." Electronic Thesis or Diss., Sorbonne université, 2019. http://www.theses.fr/2019SORUS423.

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L'infrarouge à ondes courtes (SWIR) désigne généralement les photons dans la plage de longueurs d'onde allant de 1 à 3 micromètres. Les applications dans cette fenêtre de longueur d'onde exploitent divers avantages tels qu’une grande longueur de pénétration dans le tissu biologique, la couverture spectrale pour la vision nocturne atmosphérique et l'énergie d'excitation caractéristique de certains modes de vibration moléculaire. Les photodétecteurs SWIR sont donc les composants technologiques essentiels pour la communication optique, la détection de gaz dans l’environnement, le biodiagnostic et
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Livache, Clément. "Quantum-confined nanocrystals for infrared optoelectronics : carrier dynamics and intraband transitions". Electronic Thesis or Diss., Sorbonne université, 2019. http://www.theses.fr/2019SORUS216.

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Les nanocristaux colloïdaux sont des objets cristallins obtenus par voie chimique. Ces objets étant confinés, leurs propriétés optiques dépendent de leur taille, et peuvent donc être ajustées à la demande. Les nanocristaux de tellurure de mercure et de séléniure de mercure possèdent notamment des propriétés d’absorption dans l’infrarouge: l’énergie de bande interdite (interbande) des nanocristaux de HgTe peut-être variée du SWIR au MWIR, tandis que les nanocristaux de HgSe, grâce à un auto-dopage électronique dégénéré, présentent des transitions intrabande ajustables du MWIR au LWIR. Un contrôl
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Gencer, Imer Arife. "Si Nanocrystals In Sic Matrix And Infrared Spectroscopy Of In A Dielecric Matrix." Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/3/12611778/index.pdf.

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This study focuses on various aspects of nanocrystals embedded in a dielectric matrix. In the first part of this work, a new approach with the use of Fourier Transform Infrared spectroscopy (FTIR) in the nanocrystal analysis was developed and presented. Si and Ge nanocrystals embedded in SiO2 matrix were mainly studied. This new approach is based on the analysis of structural variations of SiO2 matrix during the formation of semiconductor nanocrystlas. It is shown that the chemical and structural variations of the host matrix are directly related to the precipitation of nanocrystals in it. Thi
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Kriegel, Ilka [Verfasser], and Jochen [Akademischer Betreuer] Feldmann. "Near-infrared plasmonics with vacancy doped semiconductor nanocrystals / Ilka Kriegel. Betreuer: Jochen Feldmann." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2013. http://d-nb.info/1046503316/34.

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Books on the topic "Infrared nanocrystals"

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Chang, Tung-Wah Frederick. Luminescence and energy transfer excitation of infrared colloidal semiconductor nanocrystals: Y Tung-Wah Frederick Chang. 2006.

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Book chapters on the topic "Infrared nanocrystals"

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Sugimoto, Hiroshi, and Minoru Fujii. "Near-infrared luminescent colloidal silicon nanocrystals." In Silicon Nanomaterials Sourcebook. CRC Press, 2017. http://dx.doi.org/10.4324/9781315153544-19.

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Lhuillier, Emmanuel, Tung Huu Dang, Mariarosa Cavallo, et al. "Infrared Sensing Using Mercury Chalcogenide Nanocrystals." In Handbook of II-VI Semiconductor-Based Sensors and Radiation Detectors. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-20510-1_7.

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Heitmann, Detlef, and Can-Ming Hu. "Far-Infrared Spectroscopy of Low-Dimensional Electron Systems." In Quantum Materials, Lateral Semiconductor Nanostructures, Hybrid Systems and Nanocrystals. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-10553-1_5.

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Marciniak, Łukasz, W. Strek, A. Lukowiak, A. Bednarkiewicz, R. Wiglusz, and D. Hreniak. "Infrared Induced White Anti-stokes Emission of LiYbP4O12 Nanocrystals." In NATO Science for Peace and Security Series B: Physics and Biophysics. Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-5313-6_43.

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Nakajima, Atsushi, Minoru Fujii, Shinji Hayashi, and Koji Kaya. "Visible and Infrared Photoluminescence from Deposited Germanium-Oxide Clusters and from Ge Nanocrystals." In Frontiers of Nano-Optoelectronic Systems. Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-010-0890-7_20.

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Ca, N. X., N. T. Hien, N. T. Luyen, and P. M. Tan. "Near-Infrared Emitting Type-II CdTe/CdSe Core/Shell Nanocrystals: Synthesis and Optical Properties." In Advances in Engineering Research and Application. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-04792-4_52.

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He, Ying, K. Ma, L. Bi, J. Y. Feng, and Q. L. Wu. "Strong Near-Infrared Luminescence from NiSi2-Passivated Silicon Nanocrystals Embedded in SiOx Films." In Key Engineering Materials. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-410-3.655.

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Pietryga, Jeffrey M., Jennifer A. Hollingsworth, Fudong Wang, and William E. Buhro. "Mid-Infrared Emitting Lead Selenide Nanocrystal Quantum Dots." In Inorganic Syntheses: Volume 36. John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118744994.ch37.

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Sugimoto, Hiroshi, and Minoru Fujii. "Near-infrared luminescent colloidal silicon nanocrystals." In Silicon Nanomaterials Sourcebook. CRC Press, 2017. http://dx.doi.org/10.1201/9781315153544-20.

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Tao, Ke, Kang Sun, and Seok Ki Choi. "Upconversion nanocrystals for near-infrared-controlled drug delivery." In Photonanotechnology for Therapeutics and Imaging. Elsevier, 2020. http://dx.doi.org/10.1016/b978-0-12-817840-9.00012-6.

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Conference papers on the topic "Infrared nanocrystals"

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Lhuillier, Emmanuel, Tung Hu Dang, Adrien Khalili, David Darson, Pierre Potet, and Angela Vasanelli. "Nanophotonics applied to the design of nanocrystal based infrared sensor." In CLEO: Applications and Technology. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/cleo_at.2024.jm4d.3.

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It's fascinating to witness the significant progress achieved in leveraging colloidal nanocrystals as a viable platform for infrared optoelectronics. Their adaptability as a spin-coatable resist with infrared photoactive properties has spurred developments that transcend mere material advancements and delve deeply into advanced device design. A standout accomplishment in the infrared domain is the development of infrared cameras utilizing nanocrystal thin films as their active layers. This marks a paradigm shift in infrared imaging, challenging the long-held focus on high-quality monocrystalli
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Santos, Cristiane N., Emmanuel Lhuillier, Edouard Lebouvier, Benjamin Wallter, Marc Faucher, and Jean-François Lampin. "THz scanning near-field microscopy of HgTe nanocrystals." In 2024 49th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). IEEE, 2024. http://dx.doi.org/10.1109/irmmw-thz60956.2024.10697628.

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Vishwakarma, Ashutosh, Chinmay Shailendra Gharpure, Pranab Dutta, Anshu Pandey, and Sushobhan Avasthi. "Enhanced Short-Wave Infrared Detection Using Colloidal-Synthesized AgFeS2 Nanocrystals." In 2024 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR). IEEE, 2024. http://dx.doi.org/10.1109/cleo-pr60912.2024.10676473.

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Brintlinger, Todd H., Paul D. Cunningham, Veronica R. Policht, Janice E. Boercker, and Sarah F. Brittman. "Suspended binary superlattices of infrared colloidal nanocrystals for tailored optoelectronic response." In Electro-optical and Infrared Systems: Technology and Applications XXI, edited by Duncan L. Hickman, Helge Bürsing, Philip J. Soan, and Ove Steinvall. SPIE, 2024. http://dx.doi.org/10.1117/12.3031719.

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Bag, Urmila, Lal Krishna A. S, Karima J. Perry, Shashi P. Karna, and Varun Raghunathan. "Infrared Absorption Studies on BSA-Templated Gold Nanocrystals on Silicon Metasurface Supporting Quasi Bound-State-in-Continuum Resonance." In 2024 IEEE Research and Applications of Photonics in Defense Conference (RAPID). IEEE, 2024. http://dx.doi.org/10.1109/rapid60772.2024.10646939.

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Lhuillier, Emmanuel, erwan bossavit, and Aloyse Degiron. "Controlling infrared luminescence from colloidal nanocrystals." In Materials for Sustainable Development Conference (MATSUS Fall 24). FUNDACIO DE LA COMUNITAT VALENCIANA SCITO, 2024. https://doi.org/10.29363/nanoge.matsusfall.2024.239.

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Roshan, Hossein, Anatol Prudnikau, Dongxu Zhu, et al. "Infrared Optoelectronics based on Colloidal Nanocrystals." In MATSUS Spring 2025 Conference. FUNDACIO DE LA COMUNITAT VALENCIANA SCITO, 2024. https://doi.org/10.29363/nanoge.matsusspring.2025.444.

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Tisdale, William. "Surfaces of Infrared-Active PbS Nanocrystals and their Assemblies." In Internet Conference for Quantum Dots. Fundació Scito, 2020. http://dx.doi.org/10.29363/nanoge.icqd.2020.031.

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Camilo, Nilmar S., Djalmir N. Messias, Viviane Pilla, Anielle C. A. Silva, Noelio O. Dantas, and Acácio A. Andrade. "CdS Nanocrystals in Glass Phosphate Matrix With High Photoluminescence Quantum Efficiency in Near Infrared." In Latin America Optics and Photonics Conference. Optica Publishing Group, 2022. http://dx.doi.org/10.1364/laop.2022.w4a.44.

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In this work the CdS nanocrystals (NC) photoluminescence quantum efficiency (η) was determined by thermal lens technique. Due the high NC diameter a near-infrared emission is observed and η was determined η ~ 60%.
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Apretna, T., S. Massabeau, N. Goubet, et al. "Picosecond carrier dynamics in THz HgTe nanocrystals." In 2020 45th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz). IEEE, 2020. http://dx.doi.org/10.1109/irmmw-thz46771.2020.9370911.

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Reports on the topic "Infrared nanocrystals"

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Hollingsworth, Jennifer, Victoria Nisoli, Ekaterina Dolgopolova, et al. Near Infrared Plasmonic Properties in Spinel Metal Oxide Nanocrystals. Office of Scientific and Technical Information (OSTI), 2023. http://dx.doi.org/10.2172/1993209.

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Xu, Jian. Photonic Devices Based on Surface and Composition-Engineered Infrared Colloidal Nanocrystals. Defense Technical Information Center, 2012. http://dx.doi.org/10.21236/ada559844.

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Cao, Xian-An. Depleted Nanocrystal-Oxide Heterojunctions for High-Sensitivity Infrared Detection. Defense Technical Information Center, 2015. http://dx.doi.org/10.21236/ad1001326.

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