Cu1.94S nanocrystal seed mediated solution-phase growth of unique Cu2S–PbS heteronanostructures

2012 ◽  
Vol 48 (78) ◽  
pp. 9762 ◽  
Author(s):  
Tao-Tao Zhuang ◽  
Feng-Jia Fan ◽  
Ming Gong ◽  
Shu-Hong Yu
Keyword(s):  
Solution Phase ◽  
Phase Growth ◽  
Seed Mediated

scholarly journals Shape and Size Control of Bimetallic PtX (X = Au, Ni, Sn) Nanoparticles

2021 ◽  
Author(s):  
◽  
Christoph Roland Hasenöhrl
Keyword(s):  
Elemental Composition ◽  
Bimetallic Nanoparticles ◽  
Solution Phase ◽  
Future Research ◽  
Ni Nanoparticles ◽  
Organic Solution ◽  
Phase Synthesis ◽  
Bimetallic Systems ◽  
Solution Phase Synthesis ◽  
Seed Mediated

<p>Nanoparticles show interesting and novel properties compared to their bulk materials. These properties range from optical, magnetic, electronic to catalytic and can be influenced by shape, size and elemental composition. As the ability to control nanoparticle morphology is important in materials science these particles are actively researched. Moreover, by combining different metals multiple properties intrinsic to those elements can be accessed within a single system.  This thesis describes general synthetic approaches and underlying theory in the formation of nanoparticles. Focusing on organic solution phase synthesis, pathways to control both size and shape of nanoparticles are discussed. The concept behind the formation and possible structures of bimetallic nanoparticles are explained. Additionally, a brief overview about used characterisation techniques such as transmission electron microscopy and x-ray diffraction are given.  Metallic nanoparticles were formed using the organic solution phase synthesis within Fischer-Porter bottles. Elevated temperatures and the presence of hydrogen lead to thermal decomposition of the metallic precursor, reduction of formed metal ions and subsequent build-up of nanoparticles. For bimetallic nanoparticles the seed mediated growth technique is commonly used. By utilizing this technique bimetallic AuPt nanoparticles were formed. The impact of different surfactants, hydrogen pressure, precursors and reaction time upon the size, elemental composition and morphology of these bimetallic AuPt nanoparticles is investigated. The bimetallic structure is evaluated and experiments to control the growth of platinum onto the seed structures are conducted.  Further research deals with the formation of hexagonal close packed (hcp) nickel nanoparticles. By altering the surfactant type and concentration nickel favours to crystallise in its hcp modification rather than its most common face-centred cubic (fcc) phase. It was found that nickel packing in this hcp crystal system is forming hourglass-shaped nanoparticles. These particles are further used in seed mediated growth experiments with a platinum precursor to achieve bimetallic nanoparticles to both exploit the catalytic activity of platinum as well as the magnetic moment of nickel. It is shown that the choice of reaction conditions is crucial to achieve growth onto the nickel surface. Moreover, it was found that these nanoparticles are only selectively coated by platinum on hcp {001} facets leading to exposure of both nickel and platinum surfaces. The key results are summarised and the exploited parameters evaluated. Also, perspectives for future research are discussed and a brief outlook for the application of the investigated bimetallic systems is given.  Bimetallic tin-platinum nanoparticles were formed by coreduction of the respective tin and platinum containing metal precursors. Several metal sources for both tin and platinum were investigated upon their decomposition and the resulting nanoparticle shape and elemental composition. The formation of a bimetallic precursor containing a Pt-Sn bond is discussed. Further reaction parameters such as temperature and time are also investigated to eludicate their impact on the formed nanoparticles.  Finally, the key results are summarised and the exploited parameters evaluated. Also, perspectives for future research are discussed and a brief outlook for the application of the investigated bimetallic systems is given.  The discussion in Chapter 4 about selectively obtaining hcp Ni nanoparticles is shortened and a major focus is given on the platinum coating of these hourglass-shaped nanoparticles, as Lee et al. published a paper on "Shaped Ni nanoparticles with an unconventional hcp crystalline structure" (Chemical Communications, 2014, 50, 6353-6356) during the course of these studies, describing similar methods and findings as observed in this research.</p>

Colloidal Synthesis of Single-Layer MSe2(M = Mo, W) Nanosheets via Anisotropic Solution-Phase Growth Approach

2015 ◽  
Vol 137 (23) ◽  
pp. 7266-7269 ◽  
Author(s):  
Wonil Jung ◽  
Sujeong Lee ◽  
Dongwon Yoo ◽  
Sohee Jeong ◽  
Pere Miró ◽  
...  
Keyword(s):  
Single Layer ◽  
Solution Phase ◽  
Colloidal Synthesis ◽  
Phase Growth ◽  
Anisotropic Solution ◽  
Growth Approach

Organic Single-Crystal Arrays from Solution-Phase Growth Using Micropattern with Nucleation Control Region

2012 ◽  
Vol 24 (8) ◽  
pp. 1117-1122 ◽  
Author(s):  
Osamu Goto ◽  
Shigetaka Tomiya ◽  
Yosuke Murakami ◽  
Akira Shinozaki ◽  
Akira Toda ◽  
...  
Keyword(s):  
Single Crystal ◽  
Control Region ◽  
Solution Phase ◽  
Phase Growth ◽  
Organic Single Crystal

Solution-phase growth mechanism of phosphorus-doped MnAs nanoparticles: size, polydispersity and dopant control on the nanoscale

2017 ◽  
Vol 5 (13) ◽  
pp. 3352-3358 ◽  
Author(s):  
Roshini Pimmachcharige ◽  
Yanhua Zhang ◽  
Rajesh Regmi ◽  
Gavin Lawes ◽  
Stephanie L. Brock
Keyword(s):  
Size Distribution ◽  
Growth Mechanism ◽  
Rapid Quenching ◽  
Solution Phase ◽  
Trioctylphosphine Oxide ◽  
Phase Growth ◽  
Phosphorus Doped

Rapid quenching of MnAs nanoparticle syntheses leads to time-controlled P-incorporation into the lattice (from the trioctylphosphine oxide solvent) and focusing of the size distribution.

Nanorods of CoP, CdS, and ZnS

2006 ◽  
Vol 78 (9) ◽  
pp. 1651-1665 ◽  
Author(s):  
P. John Thomas ◽  
Paul Christian ◽  
Steven Daniels ◽  
Yang Li ◽  
Y. S. Wang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Structural Properties ◽  
Solution Phase ◽  
X Ray Diffraction ◽  
Phase Growth ◽  
Extrinsic Factors ◽  
X Ray ◽  
Transmission Electron

Simple thermolysis routes to CdS, ZnS, and CoP nanorods have been developed in our laboratory. The structural properties of the nanorods obtained were elucidated by means of X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HR-TEM). Arguments and calculations in support of the contention that intrinsic rather than extrinsic factors influence the solution-phase growth of nanorods are presented.

Large-scale, solution-phase growth of semiconductor nanocrystals into ultralong one-dimensional arrays and study of their electrical properties

Nanoscale ◽  
2014 ◽  
Vol 6 (12) ◽  
pp. 6828-6836 ◽  
Author(s):  
Yuchao Ma ◽  
Mengmeng Xue ◽  
Jiahua Shi ◽  
Yiwei Tan
Keyword(s):  
Electrical Properties ◽  
Field Effect ◽  
Large Scale ◽  
Field Effect Transistor ◽  
Semiconductor Nanocrystals ◽  
Solution Phase ◽  
Phase Growth ◽  
One Dimensional ◽  
Effect Transistor

A series of one-dimensional assemblies of semiconductor nanocrystals with enhanced field effect transistor performance has been studied.

Low temperature solution-phase growth of ZnSe and ZnSe/CdSe core/shell nanowires

Nanoscale ◽  
2011 ◽  
Vol 3 (8) ◽  
pp. 3145 ◽  
Author(s):  
Nattasamon Petchsang ◽  
Liubov Shapoval ◽  
Felix Vietmeyer ◽  
Yanghai Yu ◽  
Jose H. Hodak ◽  
...  
Keyword(s):  
Low Temperature ◽  
Solution Phase ◽  
Core Shell ◽  
Phase Growth ◽  
Cdse Core ◽  
Temperature Solution ◽  
Shell Nanowires

One-Step Solution Phase Growth of Transition Metal Dichalcogenide Thin Films Directly on Solid Substrates

2017 ◽  
Vol 29 (26) ◽  
pp. 1700291 ◽  
Author(s):  
Anupam Giri ◽  
Heeseung Yang ◽  
Kalianan Thiyagarajan ◽  
Woosun Jang ◽  
Jae Min Myoung ◽  
...  
Keyword(s):  
Thin Films ◽  
Transition Metal ◽  
Solution Phase ◽  
Transition Metal Dichalcogenide ◽  
Phase Growth ◽  
Solid Substrates ◽  
One Step
Sign in / Sign up

Export Citation Format

Share Document