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Free-standing InSb nanowires of 60–90 nm diameter have been electrochemically self-assembled and we have measured their room temperature Raman spectra in a weak magnetic field of ∼0.2 Tesla. Both the longitudinal (LO) and the transverse (TO) optical phonon peaks are suppressed in a magnetic field. The TO phonon peak experiences a slight red-shift and the LO phonon peak experiences a slight blue shift...
Silver is known to possess antimicrobial properties that are of chemical origin. It is believed that either Ag atoms bind to thiol groups in bacterial enzymes, or Ag+ ions enter bacterial cells and denature the DNA molecule, to kill bacteria. In the case of silver nanorods, it is also possible that the tips of nanorods puncture bacterial cells and kill bacteria via a physical mechanism. To test this...
We have electrochemically self-assembled regimented arrays of vertically standing nanowire metal-insulator-semiconductor diodes (MISD) embedded in an insulating matrix. Each diode is a 10-nm-diameter semiconductor (CdS) nanowire in contact with an underlying thin insulator ( ~20 nm thick), flanked by two metal electrodes. The density of these MISD devices exceeds 1011/cm2. The dc current-voltage characteristic...
We describe a new Spin Injection Field Effect Transistor (SIFET) with a quasi one-dimensional semiconductor channel and ferromagnetic source/drain contacts. We show that even when the ferromagnetic contacts are non-ideal with less than 100% spin polarization, the spin injection efficiency from the source into the channel can be switched from nearly +100 % to nearly +100 % with a small swing in gate...
We study spin transport in organic nanowires and show that the spin relaxation time in organics can be exceptionally long. This makes organics ideal for many applications in spintronics since the longevity of spin polarization is an important criterion for virtually all spintronic devices. We also discuss other important characteristics of spin transport in organics. Finally, we present results pertaining...
Successful growth of lanthanum monosulfide (LaS) nanodot and nanowire arrays has been performed by pulsed laser deposition (PLD) using self-assembled nanoporous alumina templates containing pores about 50 nm wide and 200-300 nm deep. The arrays were characterized by X-ray diffraction, atomic force microscopy (AFM), field emission scanning electron microscopy (FE-SEM) and scanning anode field emission...
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