نتایج جستجو برای: lead selenide

تعداد نتایج: 341308  

Journal: :international journal of nanoscience and nanotechnology 2012
m. hatami m. h. majles ara a. rostami m. dolatyari m. mahmudi

well-defined crystalline pbse nanocubes and nanospheres have been synthesized through a simple hydrothermal method by using pb2+- edta and pb2+- oleylamine complexes at 180°c for different reaction times. composition and morphology of the samples have been characterized by means of xrd and sem. gradual release process of pb2+ from pb2+-edta and pb2+-oleylamine complexes can adjust the growth ra...

Journal: :Nano letters 2007
Jia Zhu Hailin Peng Candace K Chan Konrad Jarausch Xiao Feng Zhang Yi Cui

Lead chalcogenide nanostructures are good potential candidates for applications in multiexciton solar cells, infrared photodetectors, and electroluminescence devices. Here we report the synthesis and electrical measurements of hyperbranched PbSe nanowire networks. Hyperbranched PbSe nanowire networks are synthesized via a vapor-liquid-solid (VLS) mechanism. The branching is induced by continuou...

Journal: :Angewandte Chemie 2015
Marco Esters Matti B Alemayehu Zachary Jones N T Nguyen Michael D Anderson Corinna Grosse Saskia F Fischer David C Johnson

The structure of precursors is used to control the formation of six possible structural isomers that contain four structural units of PbSe and four structural units of NbSe2: [(PbSe)1.14]4[NbSe2]4, [(PbSe)1.14]3[NbSe2]3[(PbSe)1.14]1[NbSe2]1, [(PbSe)1.14]3[NbSe2]2[(PbSe)1.14]1[NbSe2]2, [(PbSe)1.14]2[NbSe2]3[(PbSe)1.14]2[NbSe2]1, [(PbSe)1.14]2[NbSe2]2[(PbSe)1.14]1[NbSe2]1[(PbSe)1.14]1[NbSe2]1, [(...

Journal: :Nano letters 2016
Xiaochen Ren Arunima K Singh Lei Fang Mercouri G Kanatzidis Francesca Tavazza Albert V Davydov Lincoln J Lauhon

Impurity doping in two-dimensional (2D) materials can provide a route to tuning electronic properties, so it is important to be able to determine the distribution of dopant atoms within and between layers. Here we report the tomographic mapping of dopants in layered 2D materials with atomic sensitivity and subnanometer spatial resolution using atom probe tomography (APT). APT analysis shows tha...

Journal: :ACS nano 2011
Marcus Scheele Niels Oeschler Igor Veremchuk Sven-Ole Peters Alexander Littig Andreas Kornowski Christian Klinke Horst Weller

We present the full thermoelectric characterization of nanostructured bulk PbTe and PbTe-PbSe samples fabricated from colloidal core-shell nanoparticles followed by spark plasma sintering. An unusually large thermopower is found in both materials, and the possibility of energy filtering as opposed to grain boundary scattering as an explanation is discussed. A decreased Debye temperature and an ...

2010
Yu Zhang Quanqin Dai Xinbi Li Qingzhou Cui Zhiyong Gu Bo Zou Yiding Wang William W Yu

PbSe/CdSe core/shell nanocrystals with quantum yield of 70% were obtained by the "successive ion layer adsorption and reaction" technology in solution. The thickness of the CdSe shell was exactly controlled. A series of spectral red shifts with the CdSe shell growth were observed, which was attributed to the combined effect of the surface polarization and the expansion of carriers' wavefunction...

Journal: :Journal of clinical and experimental neuropsychology 2011
Wim Van der Elst Renske Wassenberg Celeste Meijs Petra Hurks Martin Van Boxtel Jelle Jolles

If the pathological left-handedness theory is valid, left-handed people who also experienced pregnancy and birth stress events (PBSEs) would especially be expected to deviate from the cognitive norm (rather than left-handers in general). This hypothesis was tested in a large sample of healthy children (aged 6.6-15.9 years). Multiple cognitive abilities were assessed, including verbal fluency an...

2011
Seishi Abe

This study investigates the preparation of PbSe-ZnSe composite thin films by simultaneous hot-wall deposition (HWD) from multiple resources. The XRD result reveals that the solubility limit of Pb in ZnSe is quite narrow, less than 1 mol%, with obvious phase-separation in the composite thin films. A nanoscale elemental mapping of the film containing 5 mol% PbSe indicates that isolated PbSe nanoc...

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