نتایج جستجو برای: silicon nanoparticles

تعداد نتایج: 184351  

2016
Durgesh Kumar Tripathi Swati Singh Vijay Pratap Singh Sheo Mohan Prasad Devendra Kumar Chauhan Nawal Kishore Dubey

Citation: Tripathi DK, Singh S, Singh VP, Prasad SM, Chauhan DK and Dubey NK (2016) Silicon Nanoparticles More Efficiently Alleviate Arsenate Toxicity than Silicon in Maize Cultiver and Hybrid Differing in Arsenate Tolerance. Front. Environ. Sci. 4:46. doi: 10.3389/fenvs.2016.00046 Silicon Nanoparticles More Efficiently Alleviate Arsenate Toxicity than Silicon in Maize Cultiver and Hybrid Diffe...

2010
James CK Lai Gayathri Ananthakrishnan Sirisha Jandhyam Vikas V Dukhande Alok Bhushan Mugdha Gokhale Christopher K Daniels Solomon W Leung

Recent evidence suggests silicon dioxide micro- and nanoparticles induce cytotoxic effects on lung cells. Thus, there is an increasing concern regarding their potential health hazard. Nevertheless, the putative toxicity of nanoparticles in mammalian cells has not yet been systematically investigated. We previously noted that several metallic oxide nanoparticles exert differential cytotoxic effe...

2015
Mingjie Wei Yong Wang

Patterning metallic nanoparticles on substrate surfaces is important in a number of applications. However, it remains challenging to fabricate such patterned nanoparticles with easily controlled structural parameters, including particle sizes and densities, from simple methods. We report on a new route to directly pattern pre-formed gold nanoparticles with different diameters on block copolymer...

Journal: :Laser physics letters 2012
L A Golovan K A Gonchar L A Osminkina V Yu Timoshenko G I Petrov V V Yakovlev

In this letter, we, for the first time, report on coherent anti-Stokes Raman scattering (CARS) spectroscopy of an ensemble of silicon nanowires (SiNWs) formed by wet chemical etching of crystalline silicon with a mask of silver nanoparticles. The fabricated SiNWs have diameter ranged from 30 to 200 nm and demonstrate both visible and infrared photolumine cence (PL) and spontaneous Raman signal,...

2015
Zejing Xu Yejia Li Boyu Zhang Tapas Purkait Alina Alb Brian S. Mitchell Scott M. Grayson Mark J. Fink

Water-soluble silicon nanoparticles were synthesized by grafting PEG polymers onto functionalized silicon nanoparticles with distal alkyne or azide moieties. The surface-functionalized silicon nanoparticles were produced in one step from the reactive high-energy ball milling (RHEBM) of silicon wafers with a mixture of either 5-chloro-1-pentyne in 1-pentyne or 1,7 octadiyne in 1-hexyne to afford...

Journal: :Nanoscale 2013
Pradip Das Arindam Saha Amit Ranjan Maity Sekhar C Ray Nikhil R Jana

A simple low temperature colloid-chemical synthetic method is reported for size controlled synthesis of hydrophobic silicon nanoparticles in the 1-10 nm range. These silicon nanoparticles show size dependent tunable visible emission from blue to red with fluorescence quantum yield in the range of 6-13%. These silicon nanoparticles can be subjected to extensive surface chemistry without signific...

2012
Brian Merritt

This project is focused on understanding the optoelectronic properties of silicon nanoparticles produced by nonthermal silane plasmas. In situ FTIRis capable of distinguishing surface hydride coverage of silicon nanoparticles and is a prominent technique used to study the surface chemistry of nanoparticles during exposure to plasma environments. Ex situ photoluminescence,UV-vis, SEM, RBS, XRD, ...

Journal: :journal of nanostructures 2013
m. zahedifar m. farangi m. h. pakzamir

germanium nanowires (genws) were synthesized using chemical vapor deposition (cvd) based on vapor–liquid–solid (vls) mechanism with au nanoparticles as catalyst and germanium tetrachloride (gecl4) as a precursor of germanium. au catalysts were deposited on silicon wafer as a thin film, firstly by sputtering technique and secondly by submerging the silicon substrates in au colloidal solution, wh...

Journal: :journal of dental research, dental clinics, dental prospects 0
mohammad bagher rezvani mohammad atai reihane hajrezai faeze hamze

background and aim: this study investigated the reinforcing effect of silica nanoparticles when incorporated into the matrix phase of an experimental dental fiber reinforced composites (frc) through the evaluation of the flexural properties of the composites. materials and methods: in this experimental study frc samples were divided into two main groups (containing two or three bundles) either ...

Afshin Ghanbarzadeh Aminreza Noghrehabadi Mehdi Ghalambaz Mohammad Ghalambaz

In the present paper, the flow and heat transfer of two types of nanofluids, namely, silver-water and silicon dioxide-water, were theoretically analyzed over an isothermal continues stretching sheet. To this purpose, the governing partial differential equations were converted to a set of nonlinear differential equations using similarity transforms and were then analytically solved. It was found...

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