Tripathy, optical properties of nano silicon

... 285–289. © Indian Academy of Sciences. 285 Optical properties of nano- silicon S TRIPATHY, R K SONI*, S K GHOSHAL and K P JAIN Department of Physics, Indian Institute of Technology, New Delhi ... spectra of (a) nano- crystalline Si prepared by pulsed plasma process ing and (b) porous silicon prepared by anodic etching using 488 nm line of Ar + laser. Optical...

Ngày tải lên: 16/03/2014, 15:31

... 2 of Fig. 11), approaching asymptotically the value of the band-gap of the undoped Si-nw. This is another indication of how doping can modify the electronic and optical properties of the Si nanostructures. 6. ... properties of the codoped nanoclusters are influenced by the insertion of more impurities (multidoping). Finally, we have studied the effect of B and P codoping...

Ngày tải lên: 16/03/2014, 15:15

... models. 4. Optical properties of SiNWs and GeNWs In Section 5 of the present paper, we aim to point out the importance of the many-body effects on the optica l re- sponse of some of the studied nanowires. ... modify their optical response as a function of their size has become one of the most challenging aspect of recent semiconductor research. Because of their natural...

Ngày tải lên: 16/03/2014, 15:33

... 2005 Abstract Arrays of aligned silicon nanowire (SiNW) were synthesized on a silicon (1 0 0) substrate by self-assembling electroless nanoelectrochemistry. Compared with that of bulk crystal silicon, the ... emission properties of aligned silicon nanowire arrays Chun Li a , Guojia Fang a,Ã , Su Sheng a , Zhiqiang Chen a , Jianbo Wang b , Shuang Ma a , Xingzhong Zhao a a Depart...

Ngày tải lên: 16/03/2014, 15:19

... erosion of bulk silicon. 2.1 DIRECT SYNTHESIS OF SILICON CLUSTERS Silicon nanoclusters can be directly synthesized by chemical reactions of suitable reactants. Methods of synthesis of Si colloids ... will review the photonic applications of nanostructured silicon. As we change the dimensionality of silicon very fascinating and new optical properties of the mater...

Ngày tải lên: 16/03/2014, 15:29

... of recent achievements in the theoretical investigations of the electronic structure, optical, MO, and XMCD properties of compounds and multilayered structures. Chapter 1 of this book is of ... physical properties of layered structures including the MO properties. Chapter 3 of the book presents the MO properties of f band ferromag- netic materials. Sections 3.1 devo...

Ngày tải lên: 17/03/2014, 14:51

... Synthesis and Optical Properties of Colloidal Tungsten Oxide Nanorods Kwangyeol Lee, Won Seok Seo, and Joon T. Park* National Research Laboratory, Department of Chemistry and School of Molecular ... tungsten oxide nanorods of varying sizes by a mild, solution-based colloidal approach. A stirred slurry of 0.70 g of W(CO) 6 (Strem, 99%), 1.33 g of Me 3 NO‚2H 2 O (6 equiv, Aldr...

Ngày tải lên: 20/03/2014, 13:08

Ngày tải lên: 22/03/2014, 11:20

... shows the Raman scattering spectra of the SiNWs and crystal silicon. A very sharp and Fig. 1. A typical SEM image of the morphology of aligned silicon nanowires of uniform diameter distribution ... 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 Te...

Ngày tải lên: 16/03/2014, 15:06

... ultra-thin silicon layers (thickness as low as 5–20 nm), and allows to obtain a very sharp interface silicon layer=buried oxide. The electrical conductance of silicon nanowires (section of 15×50 ... 85.40.Ux Keywords: AFM; Lithography; Silicon- on-insulator; Silicon nanostructures 1. Introduction Since the feasibility demonstration of oxide mask generation on a silicon wafer...

Ngày tải lên: 16/03/2014, 15:15