Finite-size effects in bismuth nanowires
نویسندگان
چکیده
Arrays of semimetallic Bi nanowires, fabricated by electrodeposition, exhibit strong finite-size effects in transport properties as the carrier mean-free path is limited by the wire dimensions. We have observed a resistivity enhancement, a very large positive magnetoresistance, and a resistance maximum that depends on the strength and orientation of the magnetic field and the nanowire diameter. These results demonstrate electrodeposited Bi nanowires as a new medium for studying the intricate physics in Bi nanostructures. @S0163-1829~98!52246-1#
منابع مشابه
TEM Measurements on Bi1-xSbx Nanowires
room temperature thermoelectric applications, while bismuth antimony alloys exhibit high efficiencies at liquid nitrogen temperature [3]. The synthesis of bismuth compound nanowires with controlled size and crystallinity, and the systematic study of their thermoelectric properties will thus contribute to better understand the influence of mesoscopic and quantum size effects on the thermoelectri...
متن کاملGrowth and Characterization of Bismuth Telluride Nanowires
Polycrystalline Bi2Te3 nanowires are electrochemically grown in ion track-etched polycarbonate membranes. Potentiostatic growth is demonstrated in templates of various thicknesses ranging from 10 to 100 μm. The smallest observed nanowire diameters are 20 nm in thin membranes and approx. 140 180 nm in thicker membranes. The influence of the various deposition parameters on the nanowire growth ra...
متن کاملSynthesis of sub-20-nm-sized bismuth 1-D structures using gallium-bismuth systems.
Bismuth (Bi) nanowires are interesting one-dimensional systems due to the significant quantum confinement effects exhibited as a function of the wire diameters, and synthesizing Bi nanowires with sizes below 20 nm is of fundamental importance in understanding quantum effects. Here, we report a bulk synthesis method to synthesize ultrafine Bi nanowires and a new morphology of bismuth nanostructu...
متن کاملTemplate Synthesis of Bismuth Telluride Nanowires
We report the fabrication of thermoelectric bismuth teUuride nanowires using the template synthesis method. A simple electrodeposition procedure was used to produce the nanowires within the pores of an alumina filtration membrane. The resulting bismuth telluride/alumina composite membranes constitute an array of thermoelectric nanowires surrounded by a thermally and electrically insulating matr...
متن کاملGrowth of Antimony Telluride and Bismuth Selenide Topological Insulator Nanowires
Topological insulators are a relatively new class of materials, which are insulating in the bulk and conductive on the surface. Surface conductance measurements of topological insulators are often obscured by impurities in the bulk. Nanowires made of a topologically insulating material provide a solution to this problem with their large surface-area-to-volume ratio. I examine the growth procedu...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1998