laser direct write of silicon nanowires
laser direct write of silicon nanowires
... Laser direct write of silicon nanowires Input Laser Window SiH 4 , N 2 Gas Nozzle Piezoelectric XYZ stage Zone Plates Substrate CVD Chamber Fig. 1 Schematic diagram of the system for laser direct ... Engineering October 2011/Vol. 50(10)104301-2 Mitchell et al.: Laser direct write of silicon nanowires Fig. 3 SEM image of femtosecond laser deposited silicon...
Ngày tải lên: 06/05/2014, 08:53
laser direct writing of silicon field effect transistor sensors
... (V D ) of 100 mV in solutions with pH values varying from 3 to 10. Consistent with p-type accumulation behavior, the FIG. 1. (a) Schematic diagram of laser direct writing of silicon wires. A laser ... deposition of an AZ1518 photoresist layer. Figure 2(a) shows an optical image of a typical device with four Si wires aligned horizontally, illustrating that our laser direct...
Ngày tải lên: 06/05/2014, 08:54
Temperature dependence of morphology and diameter of silicon nanowires synthesized by laser ablation
... oxide exceeded the growth rate of crystal silicon, outer layer of silicon oxide will surround the crystal sil- icon. As a result, the growth of crystal silicon ceased and silicon oxide of outer layer coalesced together ... The peculiar feature of the branch suggests that there may exist a competitive growth between crystal silicon core and outer layer of silicon oxide....
Ngày tải lên: 16/03/2014, 15:09
sub diffraction laser synthesis of silicon nanowires
... synthesis of silicon nanowires of tens of nanometers via laser induced chemical vapor deposition. These nanowires with diameters as small as 60 nm are produced by the interference between incident laser ... fine features of sub diffraction limit laser growth with direct material synthesis. Here we describe a laser- based method to produce silicon nanowires with widt...
Ngày tải lên: 06/05/2014, 08:54
sub diffraction laser synthesis of silicon nanowires
... synthesis of silicon nanowires of tens of nanometers via laser induced chemical vapor deposition. These nanowires with diameters as small as 60 nm are produced by the interference between incident laser ... fine features of sub diffraction limit laser growth with direct material synthesis. Here we describe a laser- based method to produce silicon nanowires with widt...
Ngày tải lên: 06/05/2014, 08:58
Carbon assisted synthesis of silicon nanowires
... char- acteristic of cubic silicon with a small impurity of silica. Reaction of silicon powder with activated car- bon in the absence of H 2 , by procedure (ii), yielded abundant quantities of SiNWs. ... to the (1 1 1) planes of silicon. The crystallinity of the nanowires is con- siderably higher when only argon was used instead of a mixture of argon and hydrogen. The...
Ngày tải lên: 16/03/2014, 15:04
Growth kinetics of silicon nanowires by platinum assisted vapour–liquid–solid mechanism
... HRTEM image of Si 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 ... degrade the performance of Si nanowire devices even if it diffuses into the nanowires. Some studies have reported on the growth of Si nanowires using Pt with a precursor of...
Ngày tải lên: 16/03/2014, 15:05
Optical spectroscopy of silicon nanowires
... Optical spectroscopy of silicon nanowires Jifa Qi a, * , John M. White a , Angela M. Belcher a , Yasuaki Masumoto b a Department of Chemistry and Biochemistry, University of Texas, Welch 4.212, ... USA b Institute of Physics, University of Tsukuba, Tsukuba, Ibaraki 305, Japan Received 16 December 2002; in final form 13 March 2003 Abstract Silicon nanowires (SiNWs) were prepar...
Ngày tải lên: 16/03/2014, 15:06
Temperature dependence of the quality of silicon nanowires produced over a titania supported gold catalyt
... °C. Silicon nanowires produced at this temperature have a well-crystal- lized silicon core with a very thin amorphous sili- con dioxide outer layer. The length of the nanowires is in the range of ... and quality of the products obtained as a function of temperature. Ó 2003 Elsevier B.V. All rights reserved. 1. Introduction Silicon nanowires (SiNWs) have been widely studied...
Ngày tải lên: 16/03/2014, 15:09
A study in the growth mechanism of silicon nanowires with or without metal catalyst
... the catalytic growth. However, the growth of silicon nanowires with sulfide is chiefly affected by the compound decomposition, gas stream, and temperature difference. Silicon nanowires fabricated with metal ... typical sample of synthesis of SiNWs without a metal catalyst [17]. In this case, the SiO x vapor decomposes into Si atoms, which act as the nuclear of SiNWs covered by...
Ngày tải lên: 16/03/2014, 15:09