Готові списки джерел за темами / CdTe NCs

Добірка наукової літератури з теми "CdTe NCs"

Автор: Grafiati

Опубліковано: 6 вересня 2023

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Статті в журналах з теми "CdTe NCs"

Kadim, Akeel M. "White Light Generation from Emissive Hybrid Nanocrystals CdSe/CdTe/CdS Core/Shell/Shell System." Nano Hybrids and Composites 27 (November 2019): 1–10. http://dx.doi.org/10.4028/www.scientific.net/nhc.27.1.

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New nanocrystals (NCs) were engineered with a core/shell/shell system consisting of CdSe core/ CdTe shell/ CdS shell. The white light generation mechanism was described depending on mixing colors from the illuminated CdSe/CdTe/CdS core/shell/shell nanocrystals. The color mixed in CdSe/CdTe/CdS core/shell/shell NCs system were used to generate extreme white light when illuminated by InGaN/GaN UV LED (λ=360 nm) the core/shell/shell NCs system tuned the chromaticity coordinates to (0.332, 0.340) and increased the intensity of the emitted white light. The synthesis of the CdSe/CdTe/CdS core/shell/shell NCs were confirmed by SEM, AFM, XRD and photoluminescence (PL) experiments due to create of surface states defects information. This enhancement was recognized to the overlap of emission with the photoluminescence (PL) spectrum of CdSe/CdTe/CdS core/shell/shell NCs which indications to a cold white light generation. Current-voltage (I–V) characteristics indicate that the output current is good compared to the few voltages (6 V) used which give acceptable results to get a generation of white light.

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Hou, Mingyue, Zhaohua Zhou, Ao Xu, Kening Xiao, Jiakun Li, Donghuan Qin, Wei Xu, and Lintao Hou. "Synthesis of Group II-VI Semiconductor Nanocrystals via Phosphine Free Method and Their Application in Solution Processed Photovoltaic Devices." Nanomaterials 11, no. 8 (August 15, 2021): 2071. http://dx.doi.org/10.3390/nano11082071.

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Solution-processed CdTe semiconductor nanocrystals (NCs) have exhibited astonishing potential in fabricating low-cost, low materials consumption and highly efficient photovoltaic devices. However, most of the conventional CdTe NCs reported are synthesized through high temperature microemulsion method with high toxic trioctylphosphine tellurite (TOP-Te) or tributylphosphine tellurite (TBP-Te) as tellurium precursor. These hazardous substances used in the fabrication process of CdTe NCs are drawing them back from further application. Herein, we report a phosphine-free method for synthesizing group II-VI semiconductor NCs with alkyl amine and alkyl acid as ligands. Based on various characterizations like UV-vis absorption (UV), transmission electron microscope (TEM), and X-ray diffraction (XRD), among others, the properties of the as-synthesized CdS, CdSe, and CdTe NCs are determined. High-quality semiconductor NCs with easily controlled size and morphology could be fabricated through this phosphine-free method. To further investigate its potential to industrial application, NCs solar cells with device configuration of ITO/ZnO/CdSe/CdTe/Au and ITO/ZnO/CdS/CdTe/Au are fabricated based on NCs synthesized by this method. By optimizing the device fabrication conditions, the champion device exhibited power conversion efficiency (PCE) of 2.28%. This research paves the way for industrial production of low-cost and environmentally friendly NCs photovoltaic devices.

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Xie, Ya, Qiongxuan Tan, Zhitao Zhang, Kuankuan Lu, Miaozi Li, Wei Xu, Donghuan Qin, Yangdong Zhang, Lintao Hou, and Hongbin Wu. "Improving performance in CdTe/CdSe nanocrystals solar cells by using bulk nano-heterojunctions." Journal of Materials Chemistry C 4, no. 27 (2016): 6483–91. http://dx.doi.org/10.1039/c6tc01571a.

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Dzhagan, Volodymyr, Nazar Mazur, Olga Kapush, Oleksandr Selyshchev, Anatolii Karnaukhov, Oleg A. Yeshchenko, Mykola I. Danylenko, Volodymyr Yukhymchuk, and Dietrich R. T. Zahn. "Core and Shell Contributions to the Phonon Spectra of CdTe/CdS Quantum Dots." Nanomaterials 13, no. 5 (March 1, 2023): 921. http://dx.doi.org/10.3390/nano13050921.

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The parameters of the shell and interface in semiconductor core/shell nanocrystals (NCs) are determinant for their optical properties and charge transfer but are challenging to be studied. Raman spectroscopy was shown earlier to be a suitable informative probe of the core/shell structure. Here, we report the results of a spectroscopic study of CdTe NCs synthesized by a facile route in water, using thioglycolic acid (TGA) as a stabilizer. Both core-level X-ray photoelectron (XPS) and vibrational (Raman and infrared) spectra show that using thiol during the synthesis results in the formation of a CdS shell around the CdTe core NCs. Even though the spectral positions of the optical absorption and photoluminescence bands of such NCs are determined by the CdTe core, the far-infrared absorption and resonant Raman scattering spectra are dominated by the vibrations related with the shell. The physical mechanism of the observed effect is discussed and opposed to the results reported before for thiol-free CdTe Ns as well as CdSe/CdS and CdSe/ZnS core/shell NC systems, where the core phonons were clearly detected under similar experimental conditions.

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SHEN, QI-HUI, YAN LIU, XI YU, XIAO-YANG LIU, MING-QIANG ZOU, JIN-FENG LI, and JIAN-GUANG ZHOU. "FORMATION OF II–VI SEMICONDUCTOR NANOCRYSTALS WITH TUNABLE VISIBLE EMISSION IN AQUEOUS SOLUTION PROMOTED BY HYDRAZINE." Nano 07, no. 06 (December 2012): 1250046. http://dx.doi.org/10.1142/s1793292012500464.

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II–VI Semiconductor nanocrystals (NCs) with tunable visible emission, such as CdS , CdSe and CdTe , were synthesized in aqueous solution using thiols as capping molecules. Hydrazine was found to promote the growth of NCs through a special mechanism. In only a few hours, the synthesis process was completed at room temperature. Under moderate conditions, the capping molecules not only changed the growth rate of NCs simply by varying the concentration, but also altered the spectral properties of NCs. The capping molecules with amino groups were propitious to the growth of CdS NCs, whereas the kinetic growth of CdS NCs was more affected by the surface passivation efficiency of NCs than by steric hindrance in the system. The fastest growth of the CdS NCs was achieved when glutathione was used as a capping molecule, while the emission of CdS and CdSe NCs were shown to remain steady and tunable using the same capping molecule. The growth rate of 3-mercaptopropionic acid-capped CdS and CdSe NCs slowed down significantly, while CdTe NCs were obtained with excellent emission properties when capped with the same molecule. Furthermore, our approach will also be useful for the study of the kinetic growth of NCs in aqueous solution.

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Liu, Ning, Zhi Min Yuan, Jie Yang, Yu Lan Zhang, Rui Li Zhang, Yong Qiang Cao, Ai Yu Zhang, Yuan Na Zhu, and Ping Yang. "Preparation and Photoluminescence of Hybrid SiO₂-Coated CdTe Nanocrystals." Advanced Materials Research 306-307 (August 2011): 1194–97. http://dx.doi.org/10.4028/www.scientific.net/amr.306-307.1194.

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Novel hybrid SiO2-coated CdTe core-shell nanocrystals (NCs) were fabricated by re-dispersing green-emitting CdTe NCs in a solution of Cd2+ions, thioglycolic acid (TGA), tetraethyl orthosilicate and ammonia with a sol-gel reaction at room temperature and a further reflux procedure. The hybrid NCs consisted of a CdTe core and a hybrid SiO2shell with CdS-like clusters. The clusters created by the reaction of Cd2+and S2-generated by the decomposition of TGA during reflux. The hybrid NCs exhibited tunable photoluminescence (PL) color from green to red and high PL quantum yield (PLQY). The CdS-like clusters play an important role for the hybrid NCs with numerous PL properties. Compared with initial CdTe NCs, the PLQY of the hybrid NCs increased from 18% to 47% together with a red-shifted PL peak wavelength of 61 nm. The average lifetime of the hybrid NCs (39 ns) is longer than that of initial CdTe NCs (25 ns). The high PLQY and the hybrid shell make CdTe NCs an important application for biological technique.

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Wang, Chao, Qiang Ma, and Xingguang Su. "Synthesis of CdTe Nanocrystals with Mercaptosuccinic Acid as Stabilizer." Journal of Nanoscience and Nanotechnology 8, no. 9 (September 1, 2008): 4408–14. http://dx.doi.org/10.1166/jnn.2008.269.

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Water soluble high quality CdTe nanocrystals (NCs) with mercaptosuccinic acid (MSA) as stabilizer are prepared by refluxing and hydrothermal synthesis in this paper. The MSA stabilizer which comprises both thioglycolic acid (TGA)-like and 3-mercaptopropionic acid (MPA)-like moieties can accelerate the whole growth process of CdTe NCs comparing with TGA-like or MPA-like stabilizer. It takes only 5 min and 2 hours to obtain green emitting (luminescence maximum at 526 nm) and red emitting (luminescence maximum at ∼650 nm) from CdTe NCs, respectively. In this study, the influences of the ratios of precursors and temperature on CdTe NCs synthesis were studied in detail, and the stable CdTe NCs with high photoluminescence quantum yield and narrow size distribution can be obtained under optimal condition by both routes. The luminescence quantum yield of the green-yellow emitting CdTe NCs obtained in this study can reach 75.2%.

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Wang, Mei Ping, Jin Hui Lin, and Xiao Li Hao. "Preparation and Characterization of CdTe/SiO₂ Composite." Advanced Materials Research 233-235 (May 2011): 1946–49. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.1946.

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TGA- stabilized CdTe nanocrystals (NCs) were prepared using sodium tellurite as tellurium source, which avoids the cumbersome processes associated with H2Te or NaHTe sources. Fluorescent CdTe/SiO2composites were prepared by a sol–gel method without the exchange of surface ligands. The composites were characterized with TEM and fluorescence spectrophotometer and investigated their stability in phosphate-buffered saline (PBS) buffer. CdTe NCs were loaded into the core of silica spheres during the formation of composite spheres. In contrast to CdTe NCs in aqueous solutions, CdTe NCs in the composite revealed better stability and the luminescence peak show red-shift.

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Xu, Jia, Yatao Pan, Zhongran Wei, Shida Luo, Xia Ran, Yulu He, Renming Liu, Zhen Chi, and Lijun Guo. "Efficient charge separation and enhanced photocurrent of CdTe quantum dots-Au nanoclusters composite with type-II band alignment." Applied Physics Letters 120, no. 14 (April 4, 2022): 143902. http://dx.doi.org/10.1063/5.0083889.

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Quantum dots (QDs)-based composites are promising candidates for optoelectronic and photonic devices. Understanding the photo-induced carrier dynamics is fundamental and crucial for improving the photoelectric conversion efficiency of nanocomposites. In this work, we have constructed nanocomposite hybridizing CdTe QDs with Au nanoclusters (Au NCs) and investigated the ultrafast carrier dynamics and enhanced photoelectric properties. The concurrent photoluminescence quenching and lifetime decreasing of CdTe QDs and Au NCs suggest a type-II band alignment, facilitating the carrier dynamics in the CdTe QDs-Au NCs' nanocomposite. The transient absorption measurements demonstrate an ultrafast and efficient electron transfer from CdTe QDs to Au NCs, effectively promoting the charge separation and inhibiting the exciton recombination. We found that the quantum efficiency of hot electron transfer can reach ∼50% with a rate constant of 1.01 × 1013 s−1 for the CdTe QDs-Au NCs' nanocomposite. As a result, the photocurrent performance of the CdTe QDs-Au NC device has been dramatically enhanced due to the efficient separation of photogenerated carriers, compared to that of individual CdTe QDs and Au NCs. These findings are significant for developing the light-harvesting and photoelectric devices based on semiconductor QDs and metal NCs.

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Slyusarenko, Nina, Marina Gerasimova, Alexei Plotnikov, Nikolai Gaponik, and Evgenia Slyusareva. "Photoluminescence properties of self-assembled chitosan-based composites containing semiconductor nanocrystals." Physical Chemistry Chemical Physics 21, no. 9 (2019): 4831–38. http://dx.doi.org/10.1039/c8cp07051b.

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The photoluminescence (PL) properties of composites obtained by embedding green-emitting semiconductor nanocrystals (NCs) of two different types (thiol-capped CdTe and CdSe/ZnS) into chitosan-based biopolymer particles were investigated.

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Більше джерел

Дисертації з теми "CdTe NCs"

Soffner, Max Erik. "Efeito anômalo nas medidas de lente térmica em vidros com pontos quânticos de CdTe." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277362.

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Orientador: Antonio Manoel Mansanares
Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin
Made available in DSpace on 2018-08-05T01:51:31Z (GMT). No. of bitstreams: 1 Soffner_MaxErik_M.pdf: 11770260 bytes, checksum: a38f679b7118b0715ab2398a3b6eab6d (MD5) Previous issue date: 2005
Resumo: Os vidros dopados com semicondutores são objeto de grande interesse pois, em geral, apresentam fortes não-linearidades ópticas e tempos de resposta curtos, devido ao efeito de confinamento quântico que estes materiais apresentam. Neste trabalho, utilizamos a técnica de lente térmica para determinar a difusividade térmica ( a ) e o comportamento da variação do índice de refração com a temperatura ( dn/dT ) em vidros borossilicatos dopados com CdTe com diferentes tempos de tratamento térmico a 540 º C. Os resultados da lente térmica mostraram o aparecimento de um comportamento anômalo para altas intensidades do laser de excitação, que consiste numa queda do sinal para tempos de medida longos. Tal característica foi comprovada com outra técnica fototérmica, a do efeito miragem. Uma possível explicção para esse comportamento é a saturação dos níveis eletrônicos do ponto quântico. A supressão da respectiva banda de absorção reduz o índice de refração para freqüências mais baixas, dando origem a uma lente divergente, compatível com a queda observada no sinal
Abstract: Semiconductor doped glasses are of great interest because of their non-linear optical properties and short response time due to quantum confinement. In this work, we used the thermal lens technique to determine the thermal diffusivity (a ) and the behavior of the temperature coefficient of the refractive index (dn/dT ) in CdTe doped borosilicate glasses treated at 540 º C for different time intervals. The thermal lens measurements showed an anomalous behavior at high intensities of the excitacion beam, which consists in a signal reduction for long acquisition time. This characteristics was confirmed using another photothermal technique, namely, the mirage effect. One possible explanation for this behavior is the saturation of the electronic levels of the quantum-dot. The suppresion of a given absorption band reduces the refractive index at lower frequencies, thus originating a divergent lens, which is in agreement with the observed signal reduction
Mestrado
Física da Matéria Condensada
Mestre em Física

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Habinshuti, J. "Du nanocristal de PbSe à l'hétéro-nanostructure PbSe/CdSe : synthèse chimique et caractérisation des propriétés physiques." Phd thesis, Université des Sciences et Technologie de Lille - Lille I, 2011. http://tel.archives-ouvertes.fr/tel-00687960.

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Ces dernières années, les nanocristaux (NCs) semi-conducteurs ont reçu un intérêt grandissant pour deux raisons principalement. D'une part, ces objets possèdent des tailles qui se situent entre celles des molécules et des matériaux cristallins. Leur étude d'un point de vue fondamental est par conséquent utile pour mieux comprendre les propriétés de la matière condensée en fonction de la dimension des objets étudiés . En particulier, les NCs de chalcogénures de plomb possèdent une constante diélectrique élevée (ε∞=23 pour PbSe) et des porteurs de charges ayant des faibles masses effectives, conduisant à la formation d'excitons avec un large rayon de Bohr effectif. De ce fait, ce sont des objets de choix pour étudier le régime de fort confinement quantique. D'autre part, la miniaturisation des composants électroniques nécessite l'utilisation d'objets semi-conducteurs aux dimensions de plus en plus petites, avec des coûts de fabrication les plus bas possibles. Les NCS semi-conducteurs, dont les synthèses chimiques sont généralement simples, répondent à cet enjeu et un certain nombre d'applications tirent avantage de leurs propriétés optiques. Dans la première partie de cette thèse, la méthode de synthèse des NCs de PbSe est décrite. Grâce à l'utilisation de plusieurs techniques de caractérisation (microscopies électroniques, diffraction des rayons X (XRD), diffraction électronique (SAED)), l'optimisation de cette méthode a conduit à l'obtention de NCs monodisperses en taille et possédant une structure cristalline parfaite. Dans un second temps, des études plus fines en spectroscopie Raman ont confirmé la qualité structurale des NCs. Elles ont aussi permis d'étudier les effets de confinement sur le spectre des phonons optiques longitudinaux. Enfin, les NCs de PbSe se détériorant rapidement à l'air, des structures coeur coquille ont été élaborées pour réaliser de l'ingénierie de bande dans des NCs à hétérostructures. En utilisant le rayonnement synchrotron et après avoir développé des techniques de dépôt de films ultra minces de NCs coeur-coquille PbSe/CdSe, la discontinuité de la bande de valence de ces structures a été étudiée par spectroscopie de photoélectrons.

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Kumar, Ajay. "Bile Salts in Supramolecular Chemistry: Synthesis of Fluorescent Nanoclusters, Oxide Nanoflowers, and Anion Effect on Metallogels." Thesis, 2019. https://etd.iisc.ac.in/handle/2005/4544.

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In summary, we have explored an interesting pH-dependent sensitization of Tb(III) using methyl salicylate (MS) as a sensitizer in aqueous media. Methyl salicylate was found to be a specific sensitizer for Tb(III) but not for Eu(III). Upon doping Eu(III) in Tb(III)-MS system resulted in the color change from green to orange depending upon the pH of the solutions. Photophysical studies confirm the energy transfer from Tb(III) to Eu(III) in the lanthanide mixed Tb(III)/Eu(III)-MS system

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Книги з теми "CdTe NCs"

Video Game Bible, 1985-2002. Victoria, Canada: Trafford Publishing, 2002.

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Частини книг з теми "CdTe NCs"

C.A. Silva, Anielle, Jerusa M. de Oliveira, Luciana R.S. Floresta, Matheus V. da Silva, José L. da S. Duarte, Karolina B. da Silva, Eurípedes A. da Silva Filho, et al. "Transition Metals Doped Nanocrystals: Synthesis, Characterization, and Applications." In Transition Metal Compounds - Synthesis, Properties, and Application. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.97326.

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Doping is a technique that makes it possible to incorporate substitutional ions into the crystalline structure of materials, generating exciting properties. This book chapter will comment on the transition metals (TM) doped nanocrystals (NCs) and how doping and concentration influence applications and biocompatibility. In the NCs doped with TM, there is a strong interaction of sp-d exchange between the NCs’ charge carriers and the unpaired electrons of the MT, generating new and exciting properties. These doped NCs can be nanopowders or be embedded in glass matrices, depending on the application of interest. Therefore, we show the group results of synthesis, characterization, and applications of iron or copper-doped ZnO nanopowders and chromium-doped Bi2S3, nickel-doped ZnTe, and manganese-doped CdTe quantum dots in the glass matrices.

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Christine Almeida Silva, Anielle, Jerusa Maria de Oliveira, Kelen Talita Romão da Silva, Francisco Rubens Alves dos Santos, João Paulo Santos de Carvalho, Rose Kethelyn Souza Avelino, Eurípedes Alves da Silva Filho, et al. "Fluorescent Markers: Proteins and Nanocrystals." In Bioluminescence [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96675.

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This book chapter will comment on fluorescent reporter proteins and nanocrystals’ applicability as fluorescent markers. Fluorescent reporter proteins in the Drosophila model system offer a degree of specificity that allows monitoring cellular and biochemical phenomena in vivo, such as autophagy, mitophagy, and changes in the redox state of cells. Titanium dioxide (TiO2) nanocrystals (NCs) have several biological applications and emit in the ultraviolet, with doping of europium ions can be visualized in the red luminescence. Therefore, it is possible to monitor nanocrystals in biological systems using different emission channels. CdSe/CdS magic-sized quantum dots (MSQDs) show high luminescence stability in biological systems and can be bioconjugated with biological molecules. Therefore, this chapter will show exciting results of the group using fluorescent proteins and nanocrystals in biological systems.

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MOTA PINHEIRO DA SILVA, SIRLENE, and ZEILA SOUSA DE ALBUQUERQUE. "CURSO DE FORMAÇÃO CONTINUADA CORPOS E DIVERSIDADE NA EDUCAÇÃO: BREVES ANÁLISES DE ATIVIDADES NO AMBIENTE VIRTUAL DE APRENDIZAGEM." In Gênero, Sexualidade e Educação. Editora Realize, 2023. http://dx.doi.org/10.46943/viii.conedu.2022.gt07.003.

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Os corpos e as sexualidades são pensados como construções culturais que recebem significados sociais e são constantemente abordadas dentro de uma perspectiva biológica, desconsiderando a corporalidade como produção da cultura e que é por meio do olhar da cultura que ela recebe sentido. O presente artigo, fruto da experiência no Curso de Aperfeiçoamento “Corpos e Diversidade na Educação – CDE” oferecido pelo Grupo de Estudos e Pesquisas sobre Gênero e Sexualidade nas Práticas Educativas – GESEPE/UFMA, objetiva analisar atividades realizadas durante o curso, tendo como base o tema Corpos e Sexualidades, destacando-se como as temáticas poderiam ser pensadas e trabalhadas em sala de aula. Realiza-se uma breve contextualização do Curso CDE, seus objetivos e sua organização. Discute-se aspectos da transversalização da temática no espaço escolar, buscando-se alternativas para a inclusão das relações de gênero e da sexualidade no planejamento e na prática pedagógica, devendo ser esta inclusão um exercício constante de (des) construção no cotidiano escolar.

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Raphael, Ellen, Lucas Tadeu Aparecido da Rosa, Isabella Fernandes Souza Aversa, Cinthia das Dores Aguiar, Luana Caroline de Oliveira Lima, Ana Paula Pereira Alves, and Luciano Sindra Virtuoso. "Avaliação de Diferentes Parâmetros de Síntese em meio Aquoso nas Propriedades Óticas de Pontos Quânticos de CdTe." In Ciências biológicas e naturais, implicações teóricas e pedagógicas, 26–38. Uniedusul, 2021. http://dx.doi.org/10.51324/86010725.3.

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Berto, Marileth Neves da Cruz, Clealcir Alves da Silva Zorzetti, Cíntia Miyuki Morio, and Gabriela Caloi Loss. "A importância do trabalho da equipe gestora da escola municipal de educação básica "Silvino Leite de Arruda": Desafios de uma gestão democrática e articulada no contexto da pandemia do covid 19." In EDUCAÇÃO AS PRINCIPAIS ABORDAGENS DESSA ÁREA V.02. Seven Editora, 2023. http://dx.doi.org/10.56238/sevedi76016v22023-113.

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Este artigo pretende analisar o caminho percorrido pela equipe gestora da Escola Municipal de Educação Básica "Silvino Leite de Arruda" na realização de uma gestão democrática articulada, cujos eixos perpassam por gestão administrativa, financeira e pedagógica no contexto da Pandemia com comprometimento e transparência buscando minimizar os impactos negativos diante da Covid-19. Baseado nas experiências vivenciadas durante o período pandêmico, busca elencar a dinâmica dessa articulação que envolve diretamente os membros da Equipe Gestora, profissionais da Unidade, Conselho Deliberativo da Unidade Escolar - CDUE e Fiscal, apontando os benefícios e desafios oriundos da prestação de um serviço de qualidade à Comunidade Escolar realizados de forma remota. O caminho metodológico utilizado foi pesquisa do tipo bibliográfica de natureza qualitativa. Os estudos e reflexões ancoraram-se principalmente em bases legais como a Constituição Federal (1988); A Lei de Diretrizes e Bases da Educação Nacional, nº 9.394 (1996); o documento da Política da Escola Cuiabana - Cultura, Tempos de Vida, direitos de Aprendizagem e Inclusão (2020) e autores como: Luck (2010); Ferreira (2011) e Toledo (2014). Por meios desses aportes teóricos metodológicos pretendemos responder se nosso objetivo proposto foi alcançado na prática de uma gestão democrática articulada a gestão administrativa, financeira e pedagógica no contexto da Pandemia.

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Santos, Tárcylla Luísa, Taciana Rocha dos Santos, and Nathalia Alves da Silva. "PECTUS SCAVATUM: VARIACOES ANATOMICAS E OPCOES TERAPEUTICAS." In Open Science Research X, 2191–93. Editora Científica Digital, 2023. http://dx.doi.org/10.37885/221211326.

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Pectus Excavatum (PE) é uma deformidade anatômica do tórax causada por variação do osso esterno em consequência à mudanças nas cartilagens costais. O PE pode ser classificado em simétrico ou assimétrico, tomando como referência a equidade entre os hemitórax separados pelo esterno, e em agudo ou amplo tendo como critério a relação entre diâmetro horizontal e a profundidade dos arcos costais. Essa intercorrência morfológica pode ser congênita ou surgir associada à síndromes como a Síndrome de Marfam (SM). De acordo com o comprometimento do osso esterno, podem surgir ou não complicações, sejam elas mais brandas, como uma dificuldade respiratória, ou mais severas, como a cardiomegalia, esta decorrente da diminuição do diâmetro anteroposterior. Objetivo. Realizar revisão integrativa sobre anatomia e características do PE e os atuais tratamentos para esta afecção. Métodos. Para desenvolver esta revisão foram utilizados os descritores “pectus excavatum”, “humanos” e “anatomia” nos sites da Biblioteca Virtual em Saúde (BVS) e Google Scholar (GS) em busca de artigos publicados no período de 2013 a 2018, nos idiomas inglês, português e espanhol. A partir disso, foram encontrados 240 artigos, dos quais selecionou-se 18 mediante critério de exclusão. O fundamento usado para a eliminação de artigos foi a ausência de relação entre o PE e a anatomia humana. Resultados. A anatomia torácica normal conta com a presença de 12 arcos costais os quais estão ligados ao esterno por meio de cartilagens. Essa conformação do esterno e dos arcos pode variar, podendo o indivíduo desenvolver o PE e o Pectus Carinatum. No PE as cartilagens costais sofrem um encurvamento de concavidade posterior e mediana levando o osso esterno a assumir tal posição, logo, cria-se na superfície uma fossa torácica, a qual caracteriza o formato de tórax em funil. O PE pode ser associado a SM, a qual pode provocar modificações do tecido conjuntivo e afetar as cartilagens torácicas. Foi visto, ainda, que em um mesmo indivíduo podem aparecer múltiplas variações anatômicas, como na descrição de um relato no qual o indivíduo possuía PE e Situs Inversus Totalis, condição em que os órgãos da região toracoabdominal estão no lado oposto ao de sua topografia normal. Sobre o tratamento, as abordagens terapêuticas atuais apresentam a possibilidade tanto de correção de problemas fisiológicos, quanto de melhora da estrutura biopsicossocial dos indivíduos, pois muitos deles sentem-se constrangidos com o PE. No âmbito conservador, tem-se a fisioterapia, o RPG (Reeducação Postural Global), uso de compressor dinâmico do tórax modificado (CDTM) e a campânula de sucção como as abordagens mais utilizadas. De forma mais resolutiva, usada para casos mais graves, recomenda-se realização do procedimento de correção das cartilagens, do osso e dos músculos intercostais em ambos os lados do esterno (esternocondroplastia); implante de prótese de silicone; além de cirurgia videolaparoscópica.

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Тези доповідей конференцій з теми "CdTe NCs"

Yang, Hongwei, Weiling Luan, and Shan-Tung Tu. "Large-Scale Synthesis of Monodisperse Nanocrystals via Microreaction." In 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2007. http://dx.doi.org/10.1115/mnc2007-21605.

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A microfluidic reactor was set up to synthesize quantum dots (QDs) in large scale. The increased reaction channels in an individual reactor lead to improved throughput while maintaining sufficient residence time for the nucleation and growth of QDs. Uniform reaction conditions in the four capillaries realized by our set-up result in superior stability of the whole system. Organometallic synthesis of CdSe was chosen as a model system to evaluate the reactor, the absorption spectra of samples collected from different streams at various time intervals are indistinguishable from each other. By systematically varying the reaction parameters, fairly monodisperse CdSe NCs was produced with three times throughput higher than the conventional single-channel counterpart, and the FWHM of the PL. peaks can be controlled in the range from 37nm to 44nm. The large-scale synthesis route is characterized as excellent reproducibility, low-cost, fast reaction, and mass-production, by which 12ml CdSe NCs solution can be produced within 1h with the reaction time of 21s.

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Maksimov, O., P. Bhattacharya, C. A. Brown, H. B. Bhandari, B. Singh, and V. Nagarkar. "Radiation Detector Quality CdTe Deposited on X-Ray Sensor Chips." In 2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC). IEEE, 2020. http://dx.doi.org/10.1109/nss/mic42677.2020.9507801.

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Abbene, L., G. Gerardi, F. Principato, A. A. Turturici, S. Del Sordo, and G. Raso. "Characterization of Al-Schottky CdTe detectors." In 2011 IEEE Nuclear Science Symposium and Medical Imaging Conference (2011 NSS/MIC). IEEE, 2011. http://dx.doi.org/10.1109/nssmic.2011.6154749.

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Lambropoulos, C. P., K. E. Karafasoulis, V. A. Gnatyuk, and S. Levytskyi. "Simulation studies of CdTe pixel detectors." In 2008 IEEE Nuclear Science Symposium and Medical Imaging conference (2008 NSS/MIC). IEEE, 2008. http://dx.doi.org/10.1109/nssmic.2008.4775166.

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Navarrete, C., S. Procz, J. Fey, G. Roque, C. Avila, M. Schuetz, A. Olivo, and M. Fiederle. "Energy sensitive X-ray phase contrast imaging with a CdTe-Timepix3 detector." In 2019 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC). IEEE, 2019. http://dx.doi.org/10.1109/nss/mic42101.2019.9060044.

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Rousseau, Julia, Patrick Radisson, and Caroline Boudou. "Energy weighting with a CdTe spectrometric detector." In 2011 IEEE Nuclear Science Symposium and Medical Imaging Conference (2011 NSS/MIC). IEEE, 2011. http://dx.doi.org/10.1109/nssmic.2011.6154748.

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Maslyanchuk, O., M. Solovan, I. Boledzyuk, I. Fodchuk, V. Gnatyuk, and T. Aoki. "Defect Structure and Spectroscopic Properties of CdTe-based X- and Gamma-Ray Detectors." In 2021 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC). IEEE, 2021. http://dx.doi.org/10.1109/nss/mic44867.2021.9875806.

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Arino, Gerard, Mokhtar Chmeissani, Carles Puigdengoles, Gianluca De Lorenzo, Ralf Diener, Pedro Arce, Enric Cabruja, et al. "Characterization of CdTe detector for use in PET." In 2011 IEEE Nuclear Science Symposium and Medical Imaging Conference (2011 NSS/MIC). IEEE, 2011. http://dx.doi.org/10.1109/nssmic.2011.6154742.

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Rossetto, O., J. P. Rostaing, J. P. Richer, O. Billoint, J. Bouvier, O. Monnet, A. Peizerat, and G. Montemont. "Integrated electronics for a CdTe based PET system." In 2009 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC 2009). IEEE, 2009. http://dx.doi.org/10.1109/nssmic.2009.5401717.

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Raulo, A., G. Hennard, M. Sowinska, R. B. James, A. Fauler, and M. Fiederle. "Te inclusions in large size CdTe THM crystals." In 2011 IEEE Nuclear Science Symposium and Medical Imaging Conference (2011 NSS/MIC). IEEE, 2011. http://dx.doi.org/10.1109/nssmic.2011.6154701.

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