Document Detail

One-step graphene coating of heteroepitaxial GaN films.
MedLine Citation:
PMID:  23059535     Owner:  NLM     Status:  In-Data-Review    
Today, state-of-the-art III-Ns technology has been focused on the growth of c-plane nitrides by metal-organic chemical vapor deposition (MOCVD) using a conventional two-step growth process. Here we show that the use of graphene as a coating layer allows the one-step growth of heteroepitaxial GaN films on sapphire in a MOCVD reactor, simplifying the GaN growth process. It is found that the graphene coating improves the wetting between GaN and sapphire, and, with as little as ∼0.6 nm of graphene coating, the overgrown GaN layer on sapphire becomes continuous and flat. With increasing thickness of the graphene coating, the structural and optical properties of one-step grown GaN films gradually transition towards those of GaN films grown by a conventional two-step growth method. The InGaN/GaN multiple quantum well structure grown on a GaN/graphene/sapphire heterosystem shows a high internal quantum efficiency, allowing the use of one-step grown GaN films as 'pseudo-substrates' in optoelectronic devices. The introduction of graphene as a coating layer provides an atomic playground for metal adatoms and simplifies the III-Ns growth process, making it potentially very useful as a means to grow other heteroepitaxial films on arbitrary substrates with lattice and thermal mismatch.
Jae-Kyung Choi; Jae-Hoon Huh; Sung-Dae Kim; Daeyoung Moon; Duhee Yoon; Kisu Joo; Jinsung Kwak; Jae Hwan Chu; Sung Youb Kim; Kibog Park; Young-Woon Kim; Euijoon Yoon; Hyeonsik Cheong; Soon-Yong Kwon
Related Documents :
23768605 - Characterization of starch films containing starch nanoparticles: part 1: physical and ...
20830905 - Fate of effluent-borne contaminants beneath septic tank drainfields overlying a karst a...
11798045 - Redox patterns and trace-element behavior in the east midlands triassic sandstone aquif...
14763625 - Transient analysis of the source of water to wells: cape cod, massachusetts.
11926365 - Investigation of potential ionic interactions between anionic and cationic polymethacry...
24201885 - Thermogenic hydrocarbons in seawater of the gippsland shelf, southeast australia.
Publication Detail:
Type:  Journal Article     Date:  2012-10-11
Journal Detail:
Title:  Nanotechnology     Volume:  23     ISSN:  1361-6528     ISO Abbreviation:  Nanotechnology     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-10-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101241272     Medline TA:  Nanotechnology     Country:  England    
Other Details:
Languages:  eng     Pagination:  435603     Citation Subset:  IM    
School of Mechanical and Advanced Materials Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, Korea.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  An atomic model of Zfp57 recognition of CpG methylation within a specific DNA sequence.
Next Document:  Discovery and initial verification of differentially abundant proteins between multiple sclerosis pa...