Microstructures of GaN Thin Films Grown on Graphene Layers

2011 ◽  
Vol 24 (4) ◽  
pp. 515-518 ◽  
Author(s):  
Hyobin Yoo ◽  
Kunook Chung ◽  
Yong Seok Choi ◽  
Chan Soon Kang ◽  
Kyu Hwan Oh ◽  
...  
Keyword(s):  
Thin Films ◽  
Graphene Layers

Growth of graphene layers for thin films

2011 ◽  
pp. 211-227
Author(s):  
B.H. Hong ◽  
H.R. Jeon
Keyword(s):  
Thin Films ◽  
Graphene Layers

scholarly journals Characterisation of thin films of graphene–surfactant composites produced through a novel semi-automated method

2016 ◽  
Vol 7 ◽  
pp. 209-219 ◽  
Author(s):  
Nik J Walch ◽  
Alexei Nabok ◽  
Frank Davis ◽  
Séamus P J Higson
Keyword(s):  
Thin Films ◽  
Total Internal Reflection ◽  
Sodium Dodecyl ◽  
Layer By Layer ◽  
Graphene Layers ◽  
Langmuir Blodgett ◽  
Stable Suspension ◽  
Automated Method ◽  
Graphene Flakes ◽  
Deposition Techniques

In this paper we detail a novel semi-automated method for the production of graphene by sonochemical exfoliation of graphite in the presence of ionic surfactants, e.g., sodium dodecyl sulfate (SDS) and cetyltrimethylammonium bromide (CTAB). The formation of individual graphene flakes was confirmed by Raman spectroscopy, while the interaction of graphene with surfactants was proven by NMR spectroscopy. The resulting graphene–surfactant composite material formed a stable suspension in water and some organic solvents, such as chloroform. Graphene thin films were then produced using Langmuir–Blodgett (LB) or electrostatic layer-by-layer (LbL) deposition techniques. The composition and morphology of the films produced was studied with SEM/EDX and AFM. The best results in terms of adhesion and surface coverage were achieved using LbL deposition of graphene(−)SDS alternated with polyethyleneimine (PEI). The optical study of graphene thin films deposited on different substrates was carried out using UV–vis absorption spectroscopy and spectroscopic ellipsometry. A particular focus was on studying graphene layers deposited on gold-coated glass using a method of total internal reflection ellipsometry (TIRE) which revealed the enhancement of the surface plasmon resonance in thin gold films by depositing graphene layers.

Microstructural defects in GaN thin films grown on chemically vapor-deposited graphene layers

2013 ◽  
Vol 102 (5) ◽  
pp. 051908 ◽  
Author(s):  
Hyobin Yoo ◽  
Kunook Chung ◽  
Suk In Park ◽  
Miyoung Kim ◽  
Gyu-Chul Yi
Keyword(s):  
Thin Films ◽  
Graphene Layers ◽  
Microstructural Defects ◽  
Chemically Vapor Deposited

scholarly journals Correction: Microstructures of GaN Thin Films Grown on Graphene Layers

2012 ◽  
Vol 24 (14) ◽  
pp. 1780-1780 ◽  
Author(s):  
Hyobin Yoo ◽  
Kunook Chung ◽  
Yong Seok Choi ◽  
Chan Soon Kang ◽  
Kyu Hwan Oh ◽  
...  
Keyword(s):  
Thin Films ◽  
Graphene Layers

scholarly journals Growth and optical characteristics of high-quality ZnO thin films on graphene layers

APL Materials ◽  
2015 ◽  
Vol 3 (1) ◽  
pp. 016103 ◽  
Author(s):  
Suk In Park ◽  
Youngbin Tchoe ◽  
Hyeonjun Baek ◽  
Jaehyuk Heo ◽  
Jerome K. Hyun ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Characteristics ◽  
Zno Thin Films ◽  
High Quality ◽  
Graphene Layers

Control of the Preferred Orientation of Polycrystalline Mo and Cu(InGa)Se2 Thin Films by Inserting Graphene Layers

2017 ◽  
Vol 10 (4) ◽  
pp. 570-574
Author(s):  
Heesan Ryu ◽  
Do Hyun Park ◽  
Younghun Jung ◽  
Jihyun Kim ◽  
Woo Kyoung Kim
Keyword(s):  
Thin Films ◽  
Preferred Orientation ◽  
Graphene Layers

scholarly journals Post-growth CdCl_2 treatment on CdTe thin films grown on graphene layers using a close-spaced sublimation method

2014 ◽  
Vol 22 (S3) ◽  
pp. A986 ◽  
Author(s):  
Younghun Jung ◽  
Gwangseok Yang ◽  
Seungju Chun ◽  
Donghwan Kim ◽  
Jihyun Kim
Keyword(s):  
Thin Films ◽  
Graphene Layers ◽  
Sublimation Method ◽  
Cdte Thin Films

Structural and Dynamical Properties of Polystyrene Thin Films Supported by Multiple Graphene Layers

2015 ◽  
Vol 48 (8) ◽  
pp. 2761-2772 ◽  
Author(s):  
Anastassia N. Rissanou ◽  
Vagelis Harmandaris
Keyword(s):  
Thin Films ◽  
Graphene Layers ◽  
Dynamical Properties

The study of interfacial reactions of nickel thin films on GaAs

1983 ◽  
Vol 41 ◽  
pp. 156-157
Author(s):  
L.J. Chen ◽  
Y.F. Hsieh
Keyword(s):  
Thin Films ◽  
Integrated Circuits ◽  
Interfacial Reactions ◽  
Metal Contacts ◽  
Nickel Thin Films ◽  
Thin Foils ◽  
The Status ◽  
Si Doped ◽  
Electron Microscopes

One measure of the maturity of a device technology is the ease and reliability of applying contact metallurgy. Compared to metal contact of silicon, the status of GaAs metallization is still at its primitive stage. With the advent of GaAs MESFET and integrated circuits, very stringent requirements were placed on their metal contacts. During the past few years, extensive researches have been conducted in the area of Au-Ge-Ni in order to lower contact resistances and improve uniformity. In this paper, we report the results of TEM study of interfacial reactions between Ni and GaAs as part of the attempt to understand the role of nickel in Au-Ge-Ni contact of GaAs.N-type, Si-doped, (001) oriented GaAs wafers, 15 mil in thickness, were grown by gradient-freeze method. Nickel thin films, 300Å in thickness, were e-gun deposited on GaAs wafers. The samples were then annealed in dry N2 in a 3-zone diffusion furnace at temperatures 200°C - 600°C for 5-180 minutes. Thin foils for TEM examinations were prepared by chemical polishing from the GaA.s side. TEM investigations were performed with JE0L- 100B and JE0L-200CX electron microscopes.

Studies on Water in the Hydration Chamber of a Modified Electron Microscope

1970 ◽  
Vol 28 ◽  
pp. 544-545
Author(s):  
R. C. Moretz ◽  
G. G. Hausner ◽  
D. F. Parsons
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Electron Microscope ◽  
Steady State ◽  
Room Temperature ◽  
Small Mass ◽  
Equilibrium Pressure ◽  
Biological Objects ◽  
Mechanical Pump ◽  
Differential Pumping

Use of the electron microscope to examine wet objects is possible due to the small mass thickness of the equilibrium pressure of water vapor at room temperature. Previous attempts to examine hydrated biological objects and water itself used a chamber consisting of two small apertures sealed by two thin films. Extensive work in our laboratory showed that such films have an 80% failure rate when wet. Using the principle of differential pumping of the microscope column, we can use open apertures in place of thin film windows.Fig. 1 shows the modified Siemens la specimen chamber with the connections to the water supply and the auxiliary pumping station. A mechanical pump is connected to the vapor supply via a 100μ aperture to maintain steady-state conditions.

Sign in / Sign up

Export Citation Format

Share Document