منابع مشابه
control of the optical properties of nanoparticles by laser fields
در این پایان نامه، درهمتنیدگی بین یک سیستم نقطه کوانتومی دوگانه(مولکول نقطه کوانتومی) و میدان مورد مطالعه قرار گرفته است. از آنتروپی ون نیومن به عنوان ابزاری برای بررسی درهمتنیدگی بین اتم و میدان استفاده شده و تاثیر پارامترهای مختلف، نظیر تونل زنی(که توسط تغییر ولتاژ ایجاد می شود)، شدت میدان و نسبت دو گسیل خودبخودی بر رفتار درجه درهمتنیدگی سیستم بررسی شده اشت.با تغییر هر یک از این پارامترها، در...
15 صفحه اولSynthesis, Structural and Optical Properties of PVP Encapsulated CdS Nanoparticles
Highly monodispersed CdS nanoparticles using polyvinyl pyrrolidone (PVP) as the capping agent were synthesised by chemical coprecipitation method. The surface‐modified cadmium sulfide nanoparticles were found to be remarkably stable. In the presence of PVP, cubic phase with small grain size of CdS were observed in XRD. The peaks were identified to originate fro...
متن کاملSynthesis and Optical Properties of CdSe and CdSe/CdS Nanoparticles
This paper described the optical properties of CdSe and CdSe/CdS nanoparticles, synthesized by the microemulsion method followed by refluxing in toluene/methanol (60:1). Both optical spectroscopy and structural characterization (XPS, XRD, and HRTEM) suggested the core/shell structure of CdSe/CdS samples. Most notable in this work was that capping CdSe nanoparticles with CdS materials yielded a ...
متن کاملPreparation of cds Nanoparticles Using Paraffin Oil
A method produced to preparate the CdS Cadmium sulfer using the paraffin oil instade the Olyelamine acid since it is toxic solution. The optical properties were measured by using the absorption and photoluminescence spectrum where the energy gap is about 2.8 eV. The structure properties of the prepared nanoparticles was carried out by measuring the X-ray diffraction which show the hexagonal str...
متن کاملIntermittent photocatalytic activity of single CdS nanoparticles.
Semiconductor photocatalysis holds promising keys to address various energy and environmental challenges. Most studies to date are based on ensemble analysis, which may mask critical photocatalytic kinetics in single nanocatalysts. Here we report a study of imaging photocatalytic hydrogen production of single CdS nanoparticles with a plasmonic microscopy in an in operando manner. Surprisingly, ...
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ژورنال
عنوان ژورنال: Brazilian Journal of Physics
سال: 2006
ISSN: 0103-9733
DOI: 10.1590/s0103-97332006000600062