Acoustoelectric Effect in Fluorinated Carbon Nanotube in the Absence of External Electric Field
Acoustoelectric Effect in Fluorinated Carbon Nanotube in the Absence of External Electric Field作者机构：Department of Physics College of Agriculture and Natural Sciences U.C.C Cape Coast Ghana Department of Physics Pennsylvania State University-Altoona College Altoona PA USA Material Research Institute Pennsylvania State University University Park PA USA Department of Mathematics College of Agriculture and Natural Sciences U.C.C Cape Coast Ghana
出 版 物：《World Journal of Condensed Matter Physics》 (凝固态物理国际期刊（英文）)
年 卷 期：2020年第10卷第1期
页 面：1-11页
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
主 题：Carbon Nanotube Fluorinated Acoustoelectric Hypersound
摘 要：Acoustoelectric effect (AE) in a non-degenerate Fluorine modified single walled carbon nanotube (FSWCNT) semiconductor is studied theoretically using the Boltzmann’s transport equation. The study is done in the hypersound regime i.e. , where q is the acoustic phonon wavenumber and is the electron mean free path. The results obtained are compared with that of undoped single walled carbon nanotube (SWCNT). The AE current density for FSWCNT is observed to be four orders of magnitude smaller than that of undoped SWCNT with increasing temperature, that is . This is because the electron-phonon interactions in SWCNT are stronger than FSWCNT. Thus, there are more intra-mini-band electrons interacting with the acoustic phonons to generate a higher AE current in SWCNT than in FSWCNT. This has been observed experimentally, where the electrical resistance of FSWCNT is higher than pristine SWCNT i.e. . The study shows the potential for FSWCNT as an ultrasound current source density imaging (UCSDI) and AE hydrophone material. However, FSWCNT offers the potential for room temperature applications of acoustoelectric device but other techniques are needed to reduce the resistance.
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