scholarly journals Nucleation and Growth of Zinc Sulfide Nanoparticles in Ultrathin Polymer Films by Layer-by-Layer Polyionic Assemblies

2011 ◽  
Vol 01 (02) ◽  
pp. 33-40 ◽  
Author(s):  
Sevil Cetinkaya ◽  
Qian Zhou ◽  
Shuangjian Zhang ◽  
Ashkon Mohebi ◽  
Dat V. Quach ◽  
...  
Keyword(s):  
Zinc Sulfide ◽  
Polymer Films ◽  
Nucleation And Growth ◽  
Layer By Layer ◽  
Zinc Sulfide Nanoparticles ◽  
Ultrathin Polymer Films

On Microfaceting Instability of Pt(110) Under Catalytic Oxidation of Adsorbed Co

1992 ◽  
Vol 263 ◽  
Author(s):  
M. Papoular
Keyword(s):  
Catalytic Oxidation ◽  
Oxidation Reaction ◽  
Nucleation And Growth ◽  
Point Of View ◽  
Momentum Balance ◽  
Layer By Layer ◽  
Adsorption Of Co ◽  
Specific Temperature ◽  
Energy And Momentum ◽  
Sawtooth Profile

ABSTRACTAs demonstrated by recent STM [1] and LEED [2] experiments the platinum (110) surface undergoes, at carbon monoxide submonolayer coverages, a phase transition from the 1 x 2 “missing-row” (reconstructed) state to the 1 x 1(bulk-like) state under specific temperature and partial-pressure conditions. The catalytic oxidation reaction CO + 1/2 → CO2 drives a microfaceting instability [3] [4] of the Pt(110) surface which ends up in a regular sawtooth profile with a period ≈ 200 Å, along the [110] direction.We introduce the idea that the rather extensive Pt mass transport, as involved in the process, could be energetically assisted by the reaction itself. Energy and momentum-balance considerations lead us to expect an energy ≲ 0.5 eV to be transferrable to thesubstrate. This should efficiently contribute to initiating the “scraping”process that leads to the microfaceted pattern.A simple model for nucleation and growth of facets is presented (see ref. 5), yielding characteristic times of order minutes (at T = 500 K), in fair agreement with experiment.Independently of the structural/catalytic problem, adsorption of CO at submonolayer coverages on, e.g., Pt(110) might be of interest from a surfactantphysics point of view (see ref. 6 for a very recent study on layer-by-layer homoepitaxial metal growth).

Layer-by-Layer Assembly of Ferrocene-Modified Linear Polyethylenimine Redox Polymer Films

ChemPhysChem ◽  
2013 ◽  
Vol 14 (10) ◽  
pp. 2149-2158 ◽  
Author(s):  
Jared L. DeLuca ◽  
David P. Hickey ◽  
Daniel A. Bamper ◽  
Daniel T. Glatzhofer ◽  
Matthew B. Johnson ◽  
...  
Keyword(s):  
Polymer Films ◽  
Layer By Layer ◽  
Redox Polymer ◽  
Layer By Layer Assembly ◽  
Linear Polyethylenimine ◽  
Layer Assembly

Surface Viscoelasticity Studies of Ultrathin Polymer Films Using Atomic Force Microscopic Adhesion Measurements

2001 ◽  
Vol 34 (12) ◽  
pp. 4180-4185 ◽  
Author(s):  
X. P. Wang ◽  
Xudong Xiao ◽  
O. K. C. Tsui
Keyword(s):  
Polymer Films ◽  
Atomic Force ◽  
Ultrathin Polymer Films

scholarly journals Synthesis and Characterization of Chromium Doped Zinc Sulfide Nanoparticles

OALib ◽  
2015 ◽  
Vol 02 (05) ◽  
pp. 1-8 ◽  
Author(s):  
Milind Bodke ◽  
Hari Khawal ◽  
Umesh Gawai ◽  
Babasaheb Dole
Keyword(s):  
Zinc Sulfide ◽  
Synthesis And Characterization ◽  
Zinc Sulfide Nanoparticles
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