Sandwich-like flat freestanding silicon nanocrystals
نویسندگان
چکیده
منابع مشابه
Size-dependent visible absorption and fast photoluminescence decay dynamics from freestanding strained silicon nanocrystals
In this article, we report on the visible absorption, photoluminescence (PL), and fast PL decay dynamics from freestanding Si nanocrystals (NCs) that are anisotropically strained. Direct evidence of strain-induced dislocations is shown from high-resolution transmission electron microscopy images. Si NCs with sizes in the range of approximately 5-40 nm show size-dependent visible absorption in t...
متن کاملSilicon Nanocrystals
Silicon has many advantages over other semiconductor materials: low cost, nontoxicity, practically unlimited availability, and decades of experience in purification, growth and device fabrication. It is used for almost all modern electronic devices. However, the indirect energy gap in bulk crystalline Si makes it unable to emit light efficiently and thus unsuitable for optoelectronic applicatio...
متن کاملOrigin of the Photoluminescence Quantum Yields Enhanced by Alkane-Termination of Freestanding Silicon Nanocrystals: Temperature-Dependence of Optical Properties
On the basis of the systematic study on temperature dependence of photoluminescence (PL) properties along with relaxation dynamics we revise a long-accepted mechanism for enhancing absolute PL quantum yields (QYs) of freestanding silicon nanocrystals (ncSi). A hydrogen-terminated ncSi (ncSi:H) of 2.1 nm was prepared by thermal disproportination of (HSiO1.5)n, followed by hydrofluoric etching. R...
متن کاملSilicon Nanocrystals: Biocompatible Fluorescent Nanolabel
Title of Document: SILICON NANOCRYSTALS: BIOCOMPATIBLE FLUORESCENT NANOLABEL Jonghoon Choi, Doctor of Philosophy, 2008 Directed By: Associate Professor, Nam Sun Wang, Department of Chemical and Biomolecular Engineering This study discusses a synthesis, characterization, bioconjugation, and biological responses of fluorescent silicon nanocrystals (SiNCs). First, the efficient method of synthesiz...
متن کاملA silicon nanocrystals based memory
A new memory structure using threshold shifting from charge stored in nanocrystals of silicon ('5nm in size! is described. The devices utilize direct tunneling and storage of electrons in the nanocrystals. The limited size and capacitance of the nanocrystals limit the numbers of stored electrons. Coulomb blockade effects may be important in these structures but are not necessary for their opera...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Acta Crystallographica Section A Foundations and Advances
سال: 2014
ISSN: 2053-2733
DOI: 10.1107/s2053273314090548