Nanocontact heteroepitaxy of thin GaSb and AlGaSb films on Si substrates using ultrahigh-density nanodot seeds.
Summary of "Nanocontact heteroepitaxy of thin GaSb and AlGaSb films on Si substrates using ultrahigh-density nanodot seeds."
A film of GaSb grown epitaxially on a Si substrate is a direct transition semiconductor useful for application as a light source in Si photonics and channel material in next-generation field effect transistors because its energy bandgap is close to the optical fibre communication wavelength and it possesses high carrier mobility. Here, we report a novel method for heteroepitaxial growth of high-quality GaSb/Si films, despite having a lattice mismatch as large as ∼ 12%, using elastically strain-relaxed GaSb nanodots with ultrahigh density as seed crystals for film growth. The nanodot seed crystals were grown epitaxially by restricted contact with the Si substrate through nanowindows in an ultrathin SiO(2) film on the Si substrate. A light-emitting diode containing GaSb/Si films with a thickness of ∼ 90 nm fabricated by this method operated at room temperature. The growth method was also used to fabricate AlGaSb films of high quality. Our method provides a new avenue for heteroepitaxial growth of high-quality film in systems with large lattice mismatch.
Affiliation
Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan.
Journal Details
This article was published in the following journal.
Name: Nanotechnology
ISSN: 1361-6528
Pages: 265301
Links
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/21576805
- DOI: http://dx.doi.org/10.1088/0957-4484/22/26/265301
Medical and Biotech [MESH] Definitions
Instructional Films And Videos
Works consisting of nonfiction films and video designed to teach, instruct, or train. (From Moving Image Materials: Genre Terms, 1988)
Documentaries And Factual Films
Works consisting of films, videos, and programs which depict actual persons or actual events. They do not include frank historical re-creations and do not attempt to judge the truth of the depiction in a film purporting to be factual or documentary in character. (From Moving Image Materials: Genre Terms, 1988)
Chromatography, Thin Layer
Chromatography on thin layers of adsorbents rather than in columns. The adsorbent can be alumina, silica gel, silicates, charcoals, or cellulose. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Portography
Examination of the portal circulation by the use of X-ray films after injection of radiopaque material.
Pleura
The thin serous membrane enveloping the lungs (LUNG) and lining the THORACIC CAVITY. Pleura consist of two layers, the inner visceral pleura lying next to the pulmonary parenchyma and the outer parietal pleura. Between the two layers is the PLEURAL CAVITY which contains a thin film of liquid.
PubMed Articles
Density functional simulations of structure and polymorphism in Ga/Sb films.
Thin films of gallium/antimony alloys are promising candidates for phase change memories requiring rapid crystallization at high crystallization temperatures. Prominent examples are the stoichiometric...
We report an interesting approach for preparing micropatternings of nanomaterials such as carbon nanotubes and TiO2 nanoparticles. In the method, exfoliation of electrodeposited Ni thin films was the...
Polar dependent in-plane electric transport of epitaxial ZnO thin films on SrTiO(3) substrates.
Polar (001) and nonpolar (110) ZnO epitaxial thin films were grown on SrTiO(3) substrates by the pulsed laser deposition method and the in-plane electric transport was investigated. Both films display...
Dendritic and nanostructured Pb(1-x)Sn(x)Te thin films were synthesized on gold substrates from acidic solutions through a simple electrodeposition route. The deposition potential of thin films was de...
InAs/GaSb Heterostructure Nanowires for Tunnel Field-Effect Transistors.
InAs/GaSb nanowire heterostructures with thin GaInAs inserts were grown by MOVPE and characterized by electrical measurements and transmission electron microscopy. Down-scaling of the insert thickness...
Clinical Trials
After severe burn injury, the full-thickness burn areas are excised (in the first week) and then temporarily covered with allograft (cryogenic preserved cadaver skin). This first covering...
The primary goal of the study is to evaluate the safety and potential efficacy of intra-oral dissolvable NH004 films to improve the short-term symptoms of sialorrhea (drooling) in Parkinso...
Stress Response Using Thin and Standard Size Endoscopy.
Sixty patients scheduled for upper diagnostic gastroscopy were randomised after written informed consent into three groups. 1. transnasal gastroscopy with thin endoscope 2. tra...
Prediction of Drug Interactions With CYP2C9 Substrates
CYP2C9, is one of the major drug metabolism enzymes accounting for about 20% of the hepatic cytochrome P450 content and being second only to CYP3A4. The proposed study will explore differ...
Evaluation of Rapid Diagnosis Tests in Imported Malaria
The annual number of cases of clinical malaria worldwide is estimated to be 300-500 million leading to 1.5 million deaths. Delayed care and frequent drug resistance of Plasmodium falcipar...
