Efficient indirect exciton luminescence in silicon nanowires
Efficient indirect exciton luminescence in silicon nanowires
... 78.66.Db; 78.67.Lt Keywords: Photoluminescence; Nanowire; Crystalline silicon; Indirect exciton 1. Introduction In order to realize optical interconnections in an integrated circuit (IC), it is ... Available online at www.sciencedirect.com Physica E 17 (2003) 183 – 184 www.elsevier.com/locate/physe Ecient indirect- exciton luminescence in silicon nanowires S. Nihonyanagi,...
Ngày tải lên: 16/03/2014, 15:15
A simple route to annihilate defects in silicon nanowires
... 2000 Abstract Defects inside silicon nanowires (SiNW) could be signi®cantly reduced by annealing the nanowires at 1100° C for 6 h. High-resolution transmission electron microscopy (HRTEM) showed that stacking ... All rights reserved. 1. Introduction Silicon nanowires (SiNW) have attracted much attention since large scale synthesis of SiNWs was achieved [1±3]. This achievement is mai...
Ngày tải lên: 16/03/2014, 15:03
Highly efficient and stable photoluminescence from silicon nanowires coated with sic
... dicult to obtain a suitable composition of silicon oxide required for ecient luminescence. Therefore, it is desirable to mini- mize or eliminate the silicon oxide in order to obtain silicon nano-structures ... China Received 23 June 2000 Abstract A reaction of silicon nanowires (SiNW) with methane and hydrogen has been performed to produce a thin coating layer of cubic silicon...
Ngày tải lên: 16/03/2014, 15:05
Interplay between phonon confinement effect and anharmonicity in silicon nanowires
... by silicon nanostructuring, since the quantum confinement effect may cause the increase of the silicon band gap and shift the photoluminescence into the visible energy range. The increase in resulting ... the increase in the silicon band gap and shift the photoluminescence into the visible energy range. The expectation that reducing dimensions of silicon structures would turn this...
Ngày tải lên: 16/03/2014, 15:17
A study in the growth mechanism of silicon nanowires with or without metal catalyst
... growth 1. Introduction Silicon nanowires (SiNWs), as a candidate material for nano- electronic devices, are being intensively studied [1,2]. This is because of the feasibility of integrating SiNWs ... functional building blocks into the existing CMOS technology [3]. Specifically, SiNWs can be applied in the fields including ultra sensitive bio-sensor, field effect transistors (FETs), an...
Ngày tải lên: 16/03/2014, 15:09
Investigation of au and in as solvents for the growth of silicon nanowires on si(1 1 1)
... that a thin oxide layer forms during in- sertion of the sample into the UHV chamber in spite of the preceding HF-dip. There are hints in the literature [11] that deposition of gold onto a thin layer ... get any nanowires after flooding the chamber with diluted silane and explained the absence of nanowires by considering the surface tension of indium and the low solubility of silicon...
Ngày tải lên: 16/03/2014, 15:17
Direct and Indirect speech acts in English
... acts motivated by indirect speech acts and finally indirect speech acts motivated by indirect speech acts. The proportion of individual types in the play is outlined in the following table: ... act: performing an act in saying something perlocutionary act: performing an act by saying something The locutionary act can be viewed as a mere uttering of some words in certain...
Ngày tải lên: 10/04/2013, 10:37
A study of syntactic and pragmatic features of indirect interrogative directives in english and in vietnamese
... of interrogative Where is indirectly indentified by some accompanied utterances. 4.1.1.5. Indirect interrogative directives consist of interrogative How This kind is incapable of joining in ... some kinds of indirect interrogative directive in teaching and learning English as a foreign language. - To describe the syntactic and pragmatic features of indirect interrogative dir...
Ngày tải lên: 26/11/2013, 13:21
Carbon assisted synthesis of silicon nanowires
... Conclusions SiNWs have been obtained by reacting silicon powder or silicon substrates with carbon in an inert atmosphere. Carbothermal reduction of the silica layer covering Si generates crystalline SiNWs with ... 1:0.5 and (d) SiNWs obtained in the grey portion of the sample synthesized by procedure (ii). Inset shows the nanowires obtained in the white portion. Fig. 2. XRD patter...
Ngày tải lên: 16/03/2014, 15:04
Growth kinetics of silicon nanowires by platinum assisted vapour–liquid–solid mechanism
... nanowire using Au. (d) HRTEM image of Si nanowire using Pt. Both were single crystal. (e) EDS line mapping of Si nanowires using Au catalyst. (f) EDS line mapping of Si nanowires using Pt catalyst. ... of Si nanowires using Au and Pt as catalysts. (a) Vertically-aligned Si nanowires using Au. (b) Vertically-aligned Si nanowires using Pt. Si nanowires using Pt are longer than those...
Ngày tải lên: 16/03/2014, 15:05