CdS/ZnS core–shell nanoparticles in arachidic acid LB films

Mandal, P.; Srinivasa, R.S.; Talwar, S. S.; Major, S.S.

doi:10.1016/j.apsusc.2008.01.152

Cited by 20 publications

(18 citation statements)

References 32 publications

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“…For example, preparation of monolayers and LB films of magnetic Fe 3 O 4 nanoparticles, [69] flower-like CaCO 3 nanoparticles, [70] CdS/ZnS core/shell nanoparticles, [71] and CdTe nanocrystals [72] have been presented. Amphiphilic Janus gold nanoparticles were also prepared through ligand exchange.…”

Section: Lb Films Of Zero-dimensional Spherical Nanoparticlesmentioning

confidence: 99%

Soft Langmuir–Blodgett Technique for Hard Nanomaterials

2009

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Materials and their assemblies of dimensions down to a few nanometers have attracted considerable scientific interest in physical, chemical, and biological sciences because of unique properties not available in their bulk counterparts. The Langmuir–Blodgett (LB) technique allows rigid nanomaterials to be aligned in particular structures through a flexible assembly process at liquid interfaces. In this review, we summarize the development of assembly of hard nanomaterials using soft LB techniques. An initial summary of the basic features of nanomaterials will include dimension‐related effects, synthesis, characterization, and analysis, and will be followed by examples of LB assemblies of nanomaterials described according to their morphology: nanoparticles, nanorods, nanowires, nanotubes, and nanosheets. Some of the nanomaterials have been fabricated in orientation‐controlled morphologies, and have been incorporated into prototype devices for gas sensing and photocurrent transport. In the final part of this review, the challenges remaining for LB techniques of hard nanomaterials will be overviewed, and will include a comparison with the widely‐used LB technique involving soft materials.

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Section: Lb Films Of Zero-dimensional Spherical Nanoparticlesmentioning

confidence: 99%

Soft Langmuir–Blodgett Technique for Hard Nanomaterials

2009

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“…CdSe (1.7 eV) and CdS (2.4 eV) belongs toII B and IV A group and they are most widely used semiconductor material for CdTe/CdSe and CdTe/CdS hetero-junction photovoltaic devices. [2][3][4] II B to VI A group chalcogenides [1] have been synthesized by using different techniques and used as semiconducting nanomaterials in solar cell and optoelectronics device applications. [2] Cd(SSe) thin films can be prepared by variety of techniques, such as, chemical bath deposition, evaporation, and solvothermal route [3][4][5] etc.…”

Section: Introductionmentioning

confidence: 99%

“…[2][3][4] II B to VI A group chalcogenides [1] have been synthesized by using different techniques and used as semiconducting nanomaterials in solar cell and optoelectronics device applications. [2] Cd(SSe) thin films can be prepared by variety of techniques, such as, chemical bath deposition, evaporation, and solvothermal route [3][4][5] etc. Above methods require harsh experimental condition, toxic reducing agents, organic surface directing agents, solvents and sophisticated instruments.…”

Section: Introductionmentioning

confidence: 99%

Novel Approach for Invention of Nubbly‐Like Cd(SSe) Thin Film: Photoelectrochemical Application

Khot

Mali

Patil

et al. 2016

Macromolecular Symposia

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Summary: Self-organized arrested precipitation technique (APT) has been successfully used for synthesis of nubbly-like cadmium sulfoselenide (Cd(SSe)) thin film. Deposited Cd(SSe) thin films was characterized by using UV-Vis spectrophotometer, X-ray diffraction (XRD) study, field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS) techniques. Surface profiler study revealed that thickness of deposited thin film is 793 nm. Optical absorption study indicated that, direct allowed type of transition with 1.86 eV optical band gap energy. XRD study confirmed that, deposited thin film is nanocrystalline in nature with pure hexagonal crystal structure and calculated crystallite size is 68 nm. Well-adherent and crack free deposition on substrate surface was observed in low resolution FESEM image. High resolution FESEM image shows formation of nubblylike surface morphology from bunch of smaller nanospheres. EDS pattern confirms that deposited thin film is stoichiomtric in nature. Highest short circuit current density (J sc ) of 0.454 mA/cm 2 and corresponding value of open circuit voltage (V oc ) was 782 mV. From J-V measurement, photoconversion efficiency of 0.57% was achieved.

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“…[1][2][3] Pode-se citar a técnica Langmuir-Blodgett (LB), onde camadas moleculares são preparadas em ambientes com elevado controle molecular. 1,[4][5][6] Nos filmes LB, as estruturas são extremamente organizadas e podem interagir fortemente com um substrato sólido (vidro, quartzo, silício, ouro etc). Uma vez controlados os parâmetros de deposição, diversas estruturas podem ser idealizadas através da deposição de multicamadas de vários compostos, 1,4 como biomoléculas, complexos de coordenação, polímeros sintéticos e condutores, cristais líquidos poliméricos, entre outros.…”

Section: Introductionunclassified

Organização supramolecular da ftalocianina de cobalto(II) e seu efeito na oxidação do aminoácido cisteína

et al. 2010

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Recebido em 13/2/09; aceito em 9/9/09; publicado na web em 23/2/10 SUPRAMOLECULAR ORGANIZATION OF COBALT (II) PHTHALOCYANINE ON THE PATHWAY OF CYSTEINE OXIDATION. The interest in the chemistry of cobalt (II) tetrasulfonated phthalocyanine (PcTsCo) comes mainly from its macrocycle-ligand structure combined with their special chemical characteristics, such as high solubility, well-defined redox reactions and remarkable optical absorption in the visible region. In this work, we use layer-by-layer technique in order to assemble CoTsPc and poly(allylaminehydrochloride) (PAH) in hybrid supramolecular system. The electronic spectroscopy and cyclic voltammetry techniques were utilized to study PAH/CoTsPc multilayers growth and the cysteine catalytic oxidation. PAH/CoTsPc showed high electrochemical stability and worthwhile to mention is the remarkable influence of supramolecular arrangement on the final redox properties of the system. Keywords: cobalt phthalocyanine; cysteine; supramolecular. INTRODUÇÃODiversos tipos de materiais nanoestruturados podem ser estudados mediante técnicas de deposição de filmes ultrafinos, 1,2 principalmente as nanoarquiteturas híbridas.1-3 Pode-se citar a técnica Langmuir-Blodgett (LB), onde camadas moleculares são preparadas em ambientes com elevado controle molecular.1,4-6 Nos filmes LB, as estruturas são extremamente organizadas e podem interagir fortemente com um substrato sólido (vidro, quartzo, silício, ouro etc). Uma vez controlados os parâmetros de deposição, diversas estruturas podem ser idealizadas através da deposição de multicamadas de vários compostos, 1,4 como biomoléculas, complexos de coordenação, polímeros sintéticos e condutores, cristais líquidos poliméricos, entre outros. Em alternativa à técnica LB, Decher 20,25,28,[42][43][44] imobilizadas em filmes finos LbL apresentam processos redox bem definidos, elevada estabilidade química e um arranjo geométrico quadrado planar, onde os grupos pirrois, no plano equatorial, apresentam-se inertes em relação às reações de substituição.2,45-47 Além disso, as FtTsCo têm sido utilizadas para construção de sensores para moléculas biológicas e catalisadores de diversas espécies, como glutationa (GSH), 22,23,48 cisteína (CiSH), [23][24][25][26][27]48 histidina, 26 monóxido de nitrogênio, 21,28,31 pesticidas, 29 glucose 30 e hidrazina. 31Desta forma, este trabalho apresenta as propriedades supramoleculares de filmes multicamadas contendo FtTsCo(II) e polialilamina (PAH) (PAH/FtTsCo). Utilizou-se a voltametria cíclica e a espectroscopia eletrônica na região do visível como técnicas de investigação. Por fim, avaliaram-se as propriedades eletrocatalíticas do sistema PAH/FtTsCo para oxidar o aminoácido cisteína.

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CdS/ZnS core–shell nanoparticles in arachidic acid LB films

Cited by 20 publications

References 32 publications

Soft Langmuir–Blodgett Technique for Hard Nanomaterials

Soft Langmuir–Blodgett Technique for Hard Nanomaterials

Novel Approach for Invention of Nubbly‐Like Cd(SSe) Thin Film: Photoelectrochemical Application

Organização supramolecular da ftalocianina de cobalto(II) e seu efeito na oxidação do aminoácido cisteína

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