optical properties of epitaxial bifeo3thin film

... that the band-gap of the codoped Si-nc is reduced with respect to the gap of the pure ones showing the possibility of an impurity-based engineering of the optical properties of Si-nc. Here, we ... position 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 optic...

Ngày tải lên: 16/03/2014, 15:15

... 488 nm line of Ar + laser. Optical properties of nano-silicon 287 time or with decreasing the thickness of the a-Si : H layer. This results in termination of dangling bonds of the sur- face ... 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...

Ngày tải lên: 16/03/2014, 15:31

... EMA 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 ... axis of the wire. Further the possibility to modify their optical response as a function of their size has become one of the most challenging aspect of recent semiconduct...

Ngày tải lên: 16/03/2014, 15:33

... 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 ... 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, Aldrich, 98%), and...

Ngày tải lên: 20/03/2014, 13:08

Ngày tải lên: 22/03/2014, 11:20

... studies of electronic properties of solids. If we think of the optical properties for various classes of materials, it is clear from Fig. 3.3 that major differences will be found from one class of ... PHYSICS PART II Optical Properties of Solids M. S. Dresselhaus 1 Figure 3.1: Schematic diagram of an allowed interband transition. Figure 3.2: Real part of the conduc- t...

Ngày tải lên: 24/04/2014, 17:13

... the resistance of the TiO –Pt film was 32 compared with that of the TiO film. Although the resis- 2 tance of 1H is smaller than that of 2H, the resistance of 1a is larger than that of 2a. It turns ... in 2 the TiO –Pt film. 2 In the case of the TiO –Pt film, the resistance of the 2 film fired in NH was compared with that in 3% H rAr. 32 Although the resistance of 3H...

Ngày tải lên: 19/03/2014, 16:48

... energetic levels are the source of added support of charge that changes the sensing properties of the WO 3 -based sensors. 4. Conclusions The gas sensing properties of pure and indium-doped nanoparticle ... Reduc- ing the grain size of active layers is one of the key factors to enhance the gas sensing properties of semiconductor metal oxide sensors [7,8]. Additionally, the...

Ngày tải lên: 19/03/2014, 16:48

... evident, the inner morphological properties of the sensing film were affected by the WO 3 doping. Fig. 3 revealed that the sensing films consisted of al- most a single phase of rutile TiO 2 , while Fig. ... while Fig. 4 revealed the (1 1 0) peak of the rutile TiO 2 of each film. The peaks became broader and lower with increasing amount of doped WO 3 . The grain sizes of the sensi...

Ngày tải lên: 19/03/2014, 16:48