Sn02 nanowires with diameters of 30 — 200 nm have been synthesized by using carbothermalprocess via a thick film of tin dioxide and carbon powder precursor. The nanowires werecharacterized by X-ray power diffraction (XRD), scanning electron microscopy (SEM),transmission electron microscopy (TEM) and Selected Area Electron Diffraction (SAED).The gas sensing characteristic of nanowires toward eth...

In this work, the low-temperature process steps required for the realization of nano-crystal non-volatile memory cells are discussed. An amorphous silicon film, crystallized using a diode pumped solid state green laser irradiating at 532 nm, is proposed as an active layer. The deposition of the subsequent functional layers (e.g., gate oxide) can be done using CVD and ALD reactors in a cluster t...

Nano-Sn/C composites are ideal anode materials for high energy and power density Li-ion batteries. However, because of the low melting point of Sn and the tendency of grain growth, especially during high temperature carbonization, it has been a significant challenge to create well-dispersed ultrasmall Sn nanoparticles within a carbon matrix. In this paper, we demonstrate an aerosol spray pyroly...

There are many exotic scenarios where the Lorenz number of the Wiedemann-Franz law is known to deviate from expected values. However, in conventional semiconductor systems, it is assumed to vary between the values of ∼1.49 × 10−8 W K−2 for nondegenerate semiconductors and ∼2.45 × 10−8 W K−2 for degenerate semiconductors or metals. Knowledge of the Lorenz number is important in many situations, ...

2014 We present the results of the calculation of the electronic structure of impurities (Ti, V, Cr, Mn, Co, Ni, Cu) diluted in ferromagnetic iron obtained by the method of linear combination of « muffin-tin » orbitals in the atomic sphere approximation (LMTO-ASA). The local moments and the hyperfine fields on the impurity and the electronic specific heat coefficient charges are compared with t...

We demonstrate a novel optoelectronic tweezer using light induced dielectrophoresis mechanism to optically trap and transport micro particles with optical power in the μW range. This device consists of two pattern-less surfaces: a bottom glass substrate coated with photoconductive material and a top transparent indium-tin-oxide (ITO) glass. To achieve optical trapping, we sandwich the liquid-im...

The impact of sodium contamination in tin sulfide thin-film solar cells Vera Steinmann,1,a Riley E. Brandt,1 Rupak Chakraborty,1 R. Jaramillo,1 Matthew Young,2 Benjamin K. Ofori-Okai,1 Chuanxi Yang,3 Alex Polizzotti,1 Keith A. Nelson,1 Roy G. Gordon,3 and Tonio Buonassisi1 1Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA 2National Renewable Energy Laboratory, Golden, ...

In th is pa per w e pre se n t a n d a n a ly z e a n e w pie c e w ise lin e a r m a p o f th e pla n e c a pa b le o f g e n e ra tin g ch a o tic a ttra c to rs w ith o n e a n d tw o sc ro lls. D u e to th e sh a pe o f th e a ttra c to r a n d its h y perch a o tic ity , w e c a ll it “ the discrete hyperchaotic double scroll.” It h a s th e sa m e n o n lin e a rity a s u se d in th e w e...