Gotowe bibliografie tematyczne / Silver Sulfide Quantum Dots

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Gotowa bibliografia na temat „Silver Sulfide Quantum Dots”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "Silver Sulfide Quantum Dots"

Zvyagin, A. I., T. A. Chevychelova, I. G. Grevtseva, M. S. Smirnov, A. S. Selyukov, O. V. Ovchinnikov i R. A. Ganeev. "Nonlinear Refraction in Colloidal Silver Sulfide Quantum Dots". Journal of Russian Laser Research 41, nr 6 (listopad 2020): 670–80. http://dx.doi.org/10.1007/s10946-020-09923-4.

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Purushothaman, Baskaran, i Joon Myong Song. "Ag2S quantum dot theragnostics". Biomaterials Science 9, nr 1 (2021): 51–69. http://dx.doi.org/10.1039/d0bm01576h.

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Silver sulfide quantum dots (Ag₂S QDs) as a theragnostic agent have received much attention because they provide excellent optical and chemical properties to facilitate diagnosis and therapy simultaneously.

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Zhao, Dong-Hui, Xiao-Quan Yang, Xiao-Lin Hou, Yang Xuan, Xian-Lin Song, Yuan-Di Zhao, Wei Chen, Qiong Wang i Bo Liu. "In situ aqueous synthesis of genetically engineered polypeptide-capped Ag2S quantum dots for second near-infrared fluorescence/photoacoustic imaging and photothermal therapy". Journal of Materials Chemistry B 7, nr 15 (2019): 2484–92. http://dx.doi.org/10.1039/c8tb03043j.

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Ouyang, Wenzhu, i Jie Sun. "Biosynthesis of silver sulfide quantum dots in wheat endosperm cells". Materials Letters 164 (luty 2016): 397–400. http://dx.doi.org/10.1016/j.matlet.2015.11.040.

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Xu, Kai, i Jong Heo. "Lead sulfide quantum dots in glasses controlled by silver diffusion". Journal of Non-Crystalline Solids 358, nr 5 (marzec 2012): 921–24. http://dx.doi.org/10.1016/j.jnoncrysol.2012.01.007.

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Sadovnikov, S. I., i A. I. Gusev. "Recent progress in nanostructured silver sulfide: from synthesis and nonstoichiometry to properties". Journal of Materials Chemistry A 5, nr 34 (2017): 17676–704. http://dx.doi.org/10.1039/c7ta04949h.

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This review is focused on recent progress in the synthesis and design of different forms of nanostructured silver sulfide from nanopowders to colloidal solutions, quantum dots and heteronanostructures.

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Chen, Siqi, Mojtaba Ahmadiantehrani, Nelson G. Publicover, Kenneth W. Hunter i Xiaoshan Zhu. "Thermal decomposition based synthesis of Ag-In-S/ZnS quantum dots and their chlorotoxin-modified micelles for brain tumor cell targeting". RSC Advances 5, nr 74 (2015): 60612–20. http://dx.doi.org/10.1039/c5ra11250h.

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High quality cadmium-free silver-indium-sulfide (Ag-In-S or AIS) quantum dots (QDs) and their core–shell structures (AIS/ZnS QDs) were synthesized in a thermal decomposition system and applied for cellular imaging.

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Masmali, N. A., Z. Osman i A. K. Arof. "Comparison between silver sulfide and cadmium sulfide quantum dots in ZnO and ZnO/ZnFe2O4 photoanode of quantum dots sensitized solar cells". Ionics 28, nr 4 (31.01.2022): 2007–20. http://dx.doi.org/10.1007/s11581-022-04471-0.

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Santhosh, Chella, i R. S. Ernest Ravindran. "Surface Modified Chitosan with Cadmium Sulfide Quantum Dots as Luminescent Probe for Detection of Silver Ions". Asian Journal of Chemistry 33, nr 5 (2021): 1025–30. http://dx.doi.org/10.14233/ajchem.2021.23003.

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In present work, the surface modified cadmium sulfide quantum dots (CdS QDs) was synthesized with chitosan for the detection of silver ions. Chitosan was employed as matrix medium to fabricate CdS QDs, resulting in the formation of novel QDs/chitosan composite. The CdS quantum dots surface coated with chitosan were analyzed using UV-vis spectrophotometer, X-ray diffraction and transmission electron microscope. The chitosan + CdS QDs exhibited high aqueous solubility with better steadiness. By using chitosan + CdS, the silver ions were not only detected but also reduced to nanosize due to the reducing property of chitosan. The mechanism of fluorescence quenching of chitosan + CdS by Ag+ was investigated using photoluminescence spectroscopy.

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Chen, Jin-Long, i Chang-Qing Zhu. "Functionalized cadmium sulfide quantum dots as fluorescence probe for silver ion determination". Analytica Chimica Acta 546, nr 2 (sierpień 2005): 147–53. http://dx.doi.org/10.1016/j.aca.2005.05.006.

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Rozprawy doktorskie na temat "Silver Sulfide Quantum Dots"

Raevskaya, Alexandra, Oksana Rozovik, Anastasiya Novikova, Oleksandr Selyshchev, Oleksandr Stroyuk, Volodymyr Dzhagan, Irina Goryacheva, Nikolai Gaponik, Dietrich R. T. Zahn i Alexander Eychmüller. "Luminescence and photoelectrochemical properties of size-selected aqueous copper-doped Ag–In–S quantum dots". Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-235077.

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Ternary luminescent copper and silver indium sulfide quantum dots (QDs) can be an attractive alternative to cadmium and lead chalcogenide QDs. The optical properties of Cu–In–S and Ag–In–S (AIS) QDs vary over a broad range depending on the QD composition and size. The implementation of ternary QDs as emitters in bio-sensing applications can be boosted by the development of mild and reproducible syntheses directly in aqueous solutions as well as the methods of shifting the photoluminescence (PL) bands of such QDs as far as possible into the near IR spectral range. In the present work, the copper-doping of aqueous non-stoichiometric AIS QDs was found to result in a red shift of the PL band maximum from around 630 nm to ∼780 nm and PL quenching. The deposition of a ZnS shell results in PL intensity recovery with the highest quantum yield of 15%, with almost not change in the PL band position, opposite to the undoped AIS QDs. Size-selective precipitation using 2-propanol as a non-solvent allows discrimination of up to 9 fractions of Cu-doped AIS/ZnS QDs with the average sizes in the fractions varying from around 3 to 2 nm and smaller and with reasonably the same composition irrespective of the QD size. The decrease of the average QD size results in a blue PL shift yielding a series of bright luminophors with the emission color varies from deep-red to bluish-green and the PL efficiency increases from 11% for the first fraction to up to 58% for the smallest Cu-doped AIS/ZnS QDs. The rate constant of the radiative recombination of the size-selected Cu-doped AIS/ZnS QDs revealed a steady growth with the QD size decrease as a result of the size-dependent enhancement of the spatial exciton confinement. The copper doping was found to result in an enhancement of the photoelectrochemical activity of CAIS/ZnS QDs introduced as spectral sensitizers of mesoporous titania photoanodes of liquid-junction solar cells.

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DEL, GOBBO SILVANO. "Cadmium sulfide quantum dots: growth and optical properties". Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2009. http://hdl.handle.net/2108/873.

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Negli ultimi anni, c’è stato un rapido sviluppo delle tecniche di crescita dei materiali nanostrutturati, e un forte impulso è stato dato dall’introduzione delle tecniche di crescita colloidale. Tali tecniche consentono di crescere un ampia gamma di materiali nanostrutturati, metalli e semiconduttori, con elevata cristallinità, dimensioni ridotte (< 5 nm) e con una distribuzione delle dimensioni molto stretta. Il solfuro di cadmio (CdS) nanostrutturato ha promettenti future applicazioni tecnologiche, come ad esempio nei dispositivi optoelettronici, celle solari ad alta efficienza e come tracciante fluorescente in biologia. Tuttavia, per poter sfruttare al meglio le proprietà fisiche a favore delle citate applicazioni è di fondamentale importanza una conoscenza approfondita delle proprietà fisiche. In questa tesi, sono state studiate le proprietà optovibrazionali e optoelettroniche dei quantum dots (QDs) di solfuro di cadmio cresciuti tramite un metodo di crescita colloidale. Tramite i metodi di crescita colloidale è possibile produrre QDs con dimensione ridotta e una distribuzione della dimensione molto stretta. La sintesi dei CdS-QDs consiste nella termolisi a circa 260 °C dello stearato di cadmio in presenza di solfuro di idrogeno in un solvente organico altobollente (1-ottadecene). La velocità della crescita e la dimensione finale dei QDs sono regolate dalla presenza di una molecola surfattante, l’ossido di triottilfosfina (TOPO). In particolare, QDs con una determinata dimensione e con una sua distribuzione molto stretta possono essere ottenuti regolando opportunamente la temperatura di crescita, la concentrazione dei precursori e principalmente la concentrazione del surfattante e del tempo di reazione (crescita arrestata). La morfologia, la dimensione (diametro) e la distribuzione dei diametri sono state determinate tramite TEM. Tramite spettroscopia di assorbimento, si ottengono informazioni sugli stati elettronici, inoltre, sfruttando la relazione esistente tra la band gap e il diametro, si può determinare il diametro medio di un campione di QDs. Le proprietà emissive dei QDs sono state studiate tramite spettroscopia di fotoluminescenza (PL) e dall’energia della banda di PL si può ottenere una stima del diametro medio dei QDs. Dalla larghezza di banda degli spettri di assorbimento e di PL si può ottenere anche una stima sulla distribuzione del diametro dei QDs. Un estesa parte del lavoro riguarda lo studio delle proprietà vibrazionali dei CdS-QDs, tramite spettroscopia Raman. Queste indagini sono state effettuate su campioni di CdS-QDs cresciuti appositamente con diversi diametri. Per eseguire misure micro-Raman, i campioni di CdS-QDs coordinati da molecole di TOPO che hanno una consistenza gelatinosa, sono stati trattati con acido tioglicolico (TGA). Questo trattamento è necessario per avere CdS-QDs in forma di polvere, la quale è più adatta per essere studiata tramite spettroscopia Raman. Per evitare effetti termici negli spettri o il danneggiamento del campione, le misure micro-Raman devono essere effettuate con potenze del laser molto basse. Negli spettri Raman di CdS-QDs si osserva uno spostamento del picco del fonone LO verso frequenze più basse , in particolare, tale spostamento è più marcato per i QDs più piccoli, mentre, al crescere del diametro, la frequenza si avvicina progressivamente a quella del bulk. Questa diminuzione di frequenza è causata dall’espansione del cristallo che avviene nei QDs, con il conseguente indebolimento dei legami per i quali diminuisce la frequenza di risonanza. Oltre a questo, il confinamento quantistico dei fononi è visibile come un allargamento asimmetrico della linea dei fononi, e come l’apparizione di un nuovo picco a circa 270 cm-1. Alcune pubblicazioni assegnano questo picco ai modi di superficie, mentre altri lo descivono come la conseguenza delle nuove regole di selezione dovute dalla bassa dimensionalità. Lo studio ha anche lo scopo di comparare le previsioni teoriche basate sia sul modello “dielectric continuum” che sui fononi di superficie con i risultati sperimentali. È stata trovata una relazione tra i valori di frequenza dei fononi predetti teoricamente e i risultati sperimentali, in particolare, le frequenze dei fononi di superficie sono in accordo con i risultati sperimentali. In conclusione, lo scopo di questo studio consiste nello sviluppo di un metodo per crescere CdS-QDs con le caratteristiche fisiche desiderate (diamtero voluto e distribuzione di diametro stretta) per poterne poi effettuare uno studio sistematico delle proprietà vibrazionali ed elettroniche.
In recent years, there has been a rapid development of the growth techniques of nanostructured materials, and a particular breakthrough was given by the introduction of colloidal growth techniques. These techniques allow to grow by affordable facilities, a wide range of nanostructured materials, metals and semiconductors, with high crystallinity, reduced size, narrow size distribution. Nanostructured cadmium sulfide (CdS) has promising future applications as in the realization of optoelectronic devices, high efficiency solar cells as well as fluorescent biological probe. However, in order to fully exploit the potential technological applications, the study of the physical properties of such materials is of crucial importance. In this thesis, the optoelectronic and optovibrational properties of cadmium sulfide quantum dots (QDs) grown by colloidal chemical method are studied. By the means of colloidal growth, it is possible to grow QDs with reduced size and narrow size distribution. The synthesis of CdS-QDs consists in the thermolysis (T=260 °C) of cadmium stearate in presence of hydrogen sulfide in a high temperature boiling point solvent (1-octadecene). The growth rate and final QDs size are regulated by the presence of the surfactating molecule trioctylphosphine oxide (TOPO). QDs with a determined size and a narrow size distribution can be obtained properly adjusting the growth parameters such as temperature, precursors concentrations, and principally the surfactant concentration and reaction time (arrested growth). The QDs morphology, their size and their size distribution is determined by TEM imaging. By absorption spectroscopy, information regarding the electronic states in QDs are obtained, and exploiting the relation existing between band gap and QD diameter, the mean diameter of the QDS is determined. The emissive properties of the QDs are probed by photoluminescence spectroscopy (PL). From the energy of PL band, an estimation of the QDs diameter can be obtained. Based on the width of absorbance and PL bands, the width of QDs size distributions can be estimated. A large part of the work is concerned with the study of vibrational properties of CdS-QDs by Raman spectroscopy. These investigations are carried out on the CdS-QDs samples purposely grown with different average sizes. In order to perform micro-Raman measurements, the gel-like TOPO-coated CdS-QDs are treated to replace the TOPO layer by thioglycolic acid (TGA). This treatment is necessary in order to have powder-like CdS-QDs being more suitable to a Raman scattering study. To avoid thermal effects or damage to the sample, the micro-Raman measurements must to be performed using very low laser powers (on the sample). In the Raman spectra of CdS-QDs, a decrease of the phonon frequency (red-shift) with respect to the bulk CdS frequency is observed. In particular, the red-shift is expected to be more pronounced for the smallest QDs, while at the increasing of QDs size, the phonon frequency will approach progressively to the bulk value. This red-shift is caused by the lattice expansion and by a subsequent weakening of the bonds which causes a reduction of the resonance frequency. Beyond the red-shift, the quantum confinement is visible also as an asymmetric broadening of the phonon line and by the apparition of a new peak a circa 270 cm-1. Some reports assign this peak to surface modes, while other reports describe this mode as a consequence of new selection rules arising from the reduced dimensionality. The study has also the aim to cross check the theoretical prediction based on the dielectric continuum model and on the surface modes with the experimental results. A relation between the theory and the experiment has been found, in particular, the predicted surface frequencies are in good agreement with the experiments. In conclusion, the goal of this thesis work is to develop a method to grow CdS-QDs with the desired physical characteristics (narrow size distribution) suitable for a systematic study of optical properties (vibrational and electronic).

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Rijal, Upendra. "Suppressed Carrier Scattering in Cadmium Sulfide-Encapsulated Lead Sulfide Nanocrystal Films". Bowling Green State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1402409476.

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Schmall, Nicholas Edward. "Fabrication of Binary Quantum Solids From Colloidal Semiconductor Quantum Dots". Bowling Green State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1245257669.

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Bylsma, Jason Michael. "Multidimensional Spectroscopy of Semiconductor Quantum Dots". Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4001.

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The coherent properties of semiconductor nanostructures are inherently difficult to measure and one-dimensional spectroscopies are often unable to separate inhomogeneous and homogeneous linewidths. We have refined and improved a method of performing multidimensional Fourier transform spectroscopy based on four-wave mixing (FWM) experiments in the box geometry. We have modified our system with broadband beamsplitters in all interferometer arms, high-resolution translation stages and the ability to work in reflection geometry. By improving the phase-stability of our setup and scanning pulse delays with sub-optical cycle precision, we are able to reproduce 2DFT spectra of GaAs multiple quantum wells. With the FWM signal reflected from the sample surface instead of transmitted through, we show that very low pulse powers can be used to generate coherent 2D signals from colloidal PbS quantum dots. Dephasing times are particularly difficult to measure in small colloidal quantum dots due to environmental broadening effects from the colloidal growth. We show that low-temperature pure excitonic dephasing can be measured via time-integrated measurements as well as from the cross-diagonal linewidths of 2DFT spectra. Ultrafast sub-picosecond dephasing times are measured at 5 K in 3 nm PbS quantum dots, while excitation-density-dependence is investigated in these dots. By retrieving the global phase with an all-optical method, we are able to retrieve the real-part 2D spectra of PbS quantum dots.

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Yildiz, Ibrahim. "Luminescent Probes and Photochromic Switches Based on Semiconductor Quantum Dots". Scholarly Repository, 2008. http://scholarlyrepository.miami.edu/oa_dissertations/103.

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A new strategy was developed to switch the luminescence of semiconductor quantum dots with chemical stimulations. It is based on the photoinduced transfer of either energy from CdSe-ZnS core-shell quantum dots to [1,3]oxazine ligands or electrons from the organic to the inorganic components. Upon addition of base or acid, energy or electron transfer pathways respectively become operative, leading to changes in the luminescence of the nanoparticles. These changes are fully reversible and can be exploited to probe the pH of aqueous solutions from 3 up to 11 and this design can lead to the development of pH-sensitive luminescent probes for biomedical applications based on the semiconductor quantum dots. Secondly, an operating principle to transduce the supramolecular association of complementary receptor-substrate pairs into an enhancement in the luminescence of sensitive quantum dots was identified. This system is based on the electrostatic adsorption of cationic quenchers on the surface of anionic quantum dots. The adsorbed quenchers efficiently suppress the emission character of the associated nanoparticles on the basis of photoinduced electron transfer. In the presence of target receptors able to bind the quenchers and prevent electron transfer, however, the luminescence of the quantum dots is restored. Thus, complementary receptor-substrate pairs can be identified with luminescence measurements relying on this system and this protocol can be adapted to signal protein-ligand interactions. Thirdly, a photochromic spiropyran with dithiolane appendage to adsorb on the surface of cadmium sulfide system was designed. The properties of the resulting photochrome-nanoparticle assemblies vary significantly with the experimental conditions selected for the preparation of the inorganic component. Finally, photochromic materials based on the photoinduced transfer of electrons from CdSe-ZnS core-shell quantum dots to bipyridinium dications were developed.

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Hess, Whitney Rochelle. "Exploring the versatility of lead sulfide quantum dots in low-temperature, solution-processed solar cells". Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/109683.

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Thesis: Ph. D. in Physical Chemistry, Massachusetts Institute of Technology, Department of Chemistry, 2017.
Page 161 blank. Cataloged from PDF version of thesis.
Includes bibliographical references (pages 151-160).
Solution processability and optoelectronic tunability makes lead sulfide quantum dots (PbS QDs) promising candidates for low-temperature, solution-processed thin film solar cells. Central to this thesis is the crucial role of QD surface chemistry and leveraging surface modification to prepare QDs suitable for optoelectronic device applications. The work presented here explores the versatility of PbS QDs integrated into two main device architectures, where the primary role of the QD is unique in each case. In p-i-n planar perovskite solar cells, efforts to utilize PbS QDs as a hole transport material and the effects of size tuning and surface passivation with cadmium on device characteristics are discussed. A combination of QD size reduction and minimal cadmium-to-lead cation exchange is found to improve the open circuit voltage and hole extraction into the PbS QD layer. In ZnO/PbS QD heterojunction solar cells, the feasibility of preparing fully inorganic, halometallate-passivated PbS QD inks for use as the absorber layer is discussed. A modified biphasic ligand exchange strategy is presented and in order to further elucidate electronic passivation in these QD ink systems, optical properties were investigated with steady state and time-resolved photoluminescence. Significantly, PbS QDs exhibit comparable quantum yields in solution before and after ligand exchange and no significant trap state emission was observed in solution and in film. Ink devices were fabricated with one- and two-layer depositions, which significantly reduce fabrication time compared to traditional layer-by-layer deposition, and devices exhibit anomalous efficiency improvement throughout storage in air.
by Whitney Rochelle Hess.
Ph. D. in Physical Chemistry

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Hwang, Gyuweon. "Surface trap passivation and characterization of lead sulfide quantum dots for optical and electrical applications". Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98741.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2015.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 113-119).
Quantum dots (QDs) are semiconductor nanocrystals having a size comparable to or smaller than its exciton Bohr radius. The small size of QDs leads to the quantum confinement effects in their electronic structures. Their unique optical properties, including a tunable emission from UV to IR, make QDs attractive in optoelectronic applications. However, further improvements in device performance are required to make them competitive. One well-known factor that presently limits the performance of QD thin film devices is sub-band-gap states, also referred to as trap states. For instance, trap states impair optical properties and device performance by providing alternative pathways for exciton quenching and carrier recombination. Chemical modification of QDs has been commonly used for passivating trap states and thereby improving QD devices. However, the influence of chemical modifications of ligands, QD surfaces, or synthetic routes on electrical properties of QD thin films is not sufficiently characterized. Suppressing the trap states in QD thin films is a key to improve the performance of QDbased optoelectronics. This requires fundamental understanding of trap state source, which is lacking in these materials. In this thesis, I pursue to find a systematic method to control density of trap states by exploring different characterization techniques to investigate trap states in QD thin films. These attempts provide insight to develop a rationale for fabricating better performing QD devices. This thesis focuses on the trap states in IR emitting lead sulfide (PbS) QD thin films, which have great potential for application in photovoltaics, light emitting diodes (LEDs), photodetectors, and bio-imaging. Previously, QD thin films are treated with different ligands to passivate trap states and thereby improve the device performance. Through my work, I pursued to unveil the electrical characteristics and chemical origin of trap states, and develop a strategy to suppress the trap states. First, I hypothesize that surface dangling bonds are a major source of trap states. An inorganic shell layer comprised of cadmium sulfide (CdS) is introduced to PbS QDs to passivate the surface states. Addition of CdS shell layers on PbS QDs yields an enhanced stability and quantum yield (QY), which indicates decreased trap-assisted exciton quenching. These PbS/CdS core/shell QDs have a potential for deep-tissue bio-imaging in shortwavelength IR windows of 1550-1900 nm. However, the shell layer acts as a transport barrier for carriers and results in a significant decrease in conductivity. This hinders the incorporation of the core/shell QDs in electrical applications. An improved reaction condition enables the synthesis of PbS/CdS QDs having a monolayer-thick CdS shell layer. These QDs exhibit QY and stability comparable to thick-shell PbS/CdS QDs. Incorporation of these thin-shell QDs improves external quantum efficiency of IR QD-LEDs by 80 times compared to PbS core-only QDs. In the second phase of my work, I explore capacitance-based measurement techniques for better understanding of the electrical properties of PbS QD thin films. For in-depth analysis, capacitance-based techniques are introduced, which give complementary information to current-based measurements that are widely used for the characterization of QD devices. Nyquist plots are used to determine the dielectric constant of QD films and impedance analyzing models to be used for further analysis. Mott-Schottky measurements are implemented to measure carrier concentration and mobility to compare PbS core-only and PbS/CdS core/shell QD thin films. Drive-level capacitance profiling is employed to characterize the density and energy level of trap states when QD films are oxidized. Lastly, I investigate the chemical origin of trap states and use this knowledge to suppress the trap states of PbS QD thin films. Photoluminescence spectroscopy and X-ray photoelectron spectroscopy show that standard ligand exchange procedures for device fabrication lead to the formation of sub-bandgap emission features and under-charged Pb atoms. Our experimental results are corroborated by density functional theory simulation, which shows that the presence of Pb atoms with a lower charge in QDs contributes to sub-bandgap states. The trap states generated after ligand exchange were significantly reduced by oxidation of under-charged Pb atoms using 1,4-benzoquinone. The density of trap states measured electrically with drive-level capacitance profiling shows that this reduces the electrical trap density by a factor of 40. In this thesis, I characterized trap states and showed that by suppressing the trap states we can modify the electrical properties of QD thin films, which influence the performance of QD devices directly. This work is a starting point to fully analyze the trap states in QD thin devices and thereby provides insight to design a rationale for fabricating better performing QD devices.
by Gyuweon Hwang.
Ph. D.

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Roland, Paul Joseph. "Charge Carrier Processes in Photovoltaic Materials and Devices: Lead Sulfide Quantum Dots and Cadmium Telluride". University of Toledo / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1449857685.

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Diederich, Geoffrey M. "Synthesis of Zinc Telluride/Cadmium Selenide/Cadmium Sulfide Quantum Dot Heterostructures for use in Biological Applications". Bowling Green State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1342542873.

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Książki na temat "Silver Sulfide Quantum Dots"

Synthetic and Analytical Advancements for Zinc Sulfide Containing Quantum Dots. [New York, N.Y.?]: [publisher not identified], 2021.

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Maria, Ahmed. Improving the photoluminescence quantum efficiency of size-tunable, solution-processed lead-sulfide quantum dots in film. 2004.

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Części książek na temat "Silver Sulfide Quantum Dots"

Shamsudin, S. A., N. F. Omar i S. Radiman. "Optical Properties Effect of Cadmium Sulfide Quantum Dots Towards Conjugation Process". W IFMBE Proceedings, 92–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21729-6_26.

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Mieshkov, A. M., L. I. Grebenik, T. V. Ivahnuk i L. F. Sukhodub. "Antibacterial Properties of the Nanoparticles with the Zinc Sulfide Quantum Dots". W 3rd International Conference on Nanotechnologies and Biomedical Engineering, 267–70. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-287-736-9_65.

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Lahariya, Vikas, Marta Michalska-Domańska i Sanjay J. Dhoble. "Synthesis, structural properties, and applications of cadmium sulfide quantum dots". W Quantum Dots, 235–66. Elsevier, 2023. http://dx.doi.org/10.1016/b978-0-323-85278-4.00018-0.

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"Selenide and Sulfide Quantum Dots and Nanocrystals: Optical Properties". W Handbook of Luminescent Semiconductor Materials, 319–32. CRC Press, 2016. http://dx.doi.org/10.1201/b11201-15.

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Brühwiler, D., C. Leiggener i G. Calzaferri. "14-O-04-Silver ions and quantum-sized silver sulfide clusters in zeolite A". W Studies in Surface Science and Catalysis, 177. Elsevier, 2001. http://dx.doi.org/10.1016/s0167-2991(01)81327-6.

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Reyes-Esparza, Jorge, Janet Sánchez-Quevedo, Antonieta Gómez-Solís, Patricia Rodríguez-Fragoso, Gerardo González De la Cruz i Lourdes Rodríguez-Fragoso. "Potential Harm of Maltodextrin‐Coated Cadmium Sulfide Quantum Dots in Embryos and Fetuses". W Toxicology - New Aspects to This Scientific Conundrum. InTech, 2016. http://dx.doi.org/10.5772/64653.

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MAULU, A., P. J. RODRÍGUEZ-CANTÓ i J. P. MARTÍNEZ PASTOR. "EFFICIENT PHOTODETECTORS AT TELECOM WAVELENGTHS BASED ON THIN FILMS OF LEAD SULFIDE QUANTUM DOTS". W Physics, Chemistry and Applications of Nanostructures, 556–59. WORLD SCIENTIFIC, 2015. http://dx.doi.org/10.1142/9789814696524_0136.

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Anahi, Rodríguez-López, Ayala-Calvillo Erick, Rodríguez-Fragoso Patricia, Gerardo González De la Cruz i Lourdes Rodríguez-Fragoso. "Synthesis, Characterization and Biocompatibility of Maltodextrin-coated Cadmium Sulfide Quantum Dots in Experimental Models". W Recent Progress in Science and Technology Vol. 1, 91–118. B P International (a part of SCIENCEDOMAIN International), 2023. http://dx.doi.org/10.9734/bpi/rpst/v1/3963c.

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Sadik, O. A., I. Yazgan i V. Kariuki. "Sustainable Nanotechnology: Preparing Nanomaterials from Benign and Naturally Occurring Reagents". W Chemical Processes for a Sustainable Future, 259–87. The Royal Society of Chemistry, 2014. http://dx.doi.org/10.1039/bk9781849739757-00259.

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Sustainable nanotechnology relates to the research and development of nanomaterials that have economic and societal benefits while, at the same time, minimizing negative environmental impacts. This chapter presents the preparation of sustainable nanomaterials using benign and naturally occurring reagents from both economic and environmental viewpoints. It reviews some of the significant milestones achieved towards sustainable development of nanomaterials. These include the preparation of non-toxic quantum dots, green gold, green silver, Tollens and polysaccharide methods, and green graphene nanosheets. Others are safer-by-design concepts, biologically inert SiO2, microwave irradiation and the use of biomass precursors. A case study is presented from the authors’ laboratory for the synthesis of nanostructured poly(amic) acid (PAA) membranes using the ‘sustainable by design’ (SbD) concept. SbD of biodegradable, non-cytotoxic PAA membranes was achieved by integrating amphiphilic polymers, chitosan and cyclodextrins while controlling the membrane chemistry, thickness, porosity and the method of desolvation.

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Mandal, Kumaresh, Shishir Tamang, Soni Subba, Biswajit Roy i Rakesh Tamang. "Recent Advancements in Nanotechnology: A Human Health Perspectives". W Advanced Materials and Nano Systems: Theory and Experiment - Part 2, 1–17. BENTHAM SCIENCE PUBLISHERS, 2022. http://dx.doi.org/10.2174/9789815049961122020005.

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Nanotechnology came into the limelight during the last decade of the twentieth century. It finds immense application in developing nano molecules and nanodevices using molecular, supra-molecular, and atomic level matters. Its role in biomedical engineering is proving crucial. Nanoparticles like silver nanoparticles, gold nanoparticles, etc. have wide implications in biomedicine. Even though there are arguments regarding the side effects, risk factors, removal from the human body, etc., the regular use of nanoparticles has proven cost and time-effective solutions for several human health problems. Due to their small size, nanoparticles have an extended reach in the human body and thus have become effective tools in diagnosis and disease treatment. Most importantly the application of nanotechnology in human health includes drug and protein delivery, treating cardiovascular diseases, cancer, neurodegenerative diseases, ophthalmology, etc. Various nanosystems like dendrimers, nanoshells, nanocrystals, and quantum dots are effectively used to examine and cure cancer and other patients with complex health problems. Despite its wide range of applications in human health and diseases, the toxicological risk assessment of the ecosystem and human health itself is necessary for every newly developed nanomedicine. Thus, interdisciplinary understanding and evaluation of nanotechnology-based solution tools are necessary for its judicial use in human health.

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Streszczenia konferencji na temat "Silver Sulfide Quantum Dots"

Reisfeld, Renata, Marek Eyal, Valery Chernyak i Christian K. Jorgensen. "Glasses including quantum dots of cadmium sulfide, silver, and laser dyes". W Submolecular Glass Chemistry and Physics, redaktorzy Phillip Bray i Norbert J. Kreidl. SPIE, 1991. http://dx.doi.org/10.1117/12.50210.

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Tang, Rui, Baogang Xu, Duanwen Shen, Gail Sudlow i Achilefu Samuel. "Ultrasmall visible-to-near-infrared emitting silver-sulfide quantum dots for cancer detection and imaging". W Reporters, Markers, Dyes, Nanoparticles, and Molecular Probes for Biomedical Applications X, redaktorzy Samuel Achilefu i Ramesh Raghavachari. SPIE, 2018. http://dx.doi.org/10.1117/12.2300944.

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MALYAREVICH, A. M., M. S. GAPONENKO, N. N. POSNOV, V. G. SAVITSKI, K. V. YUMASHEV, G. E. RACHKOVSKAYA, G. B. ZAKHAREVICH i in. "RELAXATION PROCESSES IN LEAD SULFIDE QUANTUM DOTS". W Proceedings of the International Conference on Nanomeeting 2007. WORLD SCIENTIFIC, 2007. http://dx.doi.org/10.1142/9789812770950_0034.

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Nezhdanov, Aleksey, Leonid Mochalov, Alexander Logunov, Mikhail Kudryashov, Dmitry Usanov, Ivan Krivenkov i Aleksandr Mashin. "Plasma Prepared Arsenic Sulfide Luminescent Quantum Dots". W 2018 20th International Conference on Transparent Optical Networks (ICTON). IEEE, 2018. http://dx.doi.org/10.1109/icton.2018.8473969.

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Sergeev, Alexander A., Andrei A. Leonov, Elena I. Zhuikova, Irina V. Postnova i Sergey S. Voznesenskiy. "Zinc sulfide quantum dots for photocatalytic and sensing applications". W ADVANCES IN ELECTRICAL AND ELECTRONIC ENGINEERING: FROM THEORY TO APPLICATIONS: Proceedings of the International Conference on Electrical and Electronic Engineering (IC3E 2017). Author(s), 2017. http://dx.doi.org/10.1063/1.4998061.

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Ushakova, Elena V., Valery V. Golubkov, Aleksandr P. Litvin, Peter S. Parfenov, Sergei A. Cherevkov, Anatoly V. Fedorov i Alexander V. Baranov. "Self-organization of lead sulfide quantum dots of different sizes". W SPIE Photonics Europe, redaktorzy David L. Andrews, Jean-Michel Nunzi i Andreas Ostendorf. SPIE, 2014. http://dx.doi.org/10.1117/12.2051635.

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MALYAREVICH, A. M., K. V. YUMASHEV, A. A. LAGATSKY, F. M. BAIN, C. T. A. BROWN, W. SIBBETT, R. R. THOMSON i in. "OPTICAL WAVEGUIDES IN GLASSES DOPED WITH LEAD SULFIDE QUANTUM DOTS". W Proceedings of the International Conference on Nanomeeting 2009. WORLD SCIENTIFIC, 2009. http://dx.doi.org/10.1142/9789814280365_0033.

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Vandana, M., S. P. Ashokkumar, H. Vijeth, M. Niranjana, L. Yesappa i H. Devendrappa. "Synthesis and characterization of graphene quantum dots-silver nanocomposites". W DAE SOLID STATE PHYSICS SYMPOSIUM 2017. Author(s), 2018. http://dx.doi.org/10.1063/1.5028677.

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Yin, Shichen, Franky So, Shuo Ding, Liping Zhu, Qi Dong i Carr Hoi Yi Ho. "Enhanced lead sulfide quantum dots infrared photodetector performance through ligand exchange". W Organic and Hybrid Sensors and Bioelectronics XIV, redaktorzy Ruth Shinar, Ioannis Kymissis i Emil J. List-Kratochvil. SPIE, 2021. http://dx.doi.org/10.1117/12.2603399.

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FERNÉE, MARK, ANDREW WATT, JAMIE WARNER, NORMAN HECKENBERG, HALINA RUBINSZTEIN-DUNLOP i JAMIE RICHES. "OPTICAL AND STRUCTURAL INVESTIGATION OF SURFACE-PASSIVATED LEAD SULFIDE QUANTUM DOTS". W Oz Nano 03. WORLD SCIENTIFIC, 2004. http://dx.doi.org/10.1142/9789812702692_0022.

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