摘要
借助于电化学沉积的方法,在氧化铝纳米孔内生长Bi2Te3材料,从而形成温差电纳米线阵列．利用SEM, XRD and TEM分析手段对制备的纳米线形貌和结构进行了分析,测量了纳米线的组成和温差电性能．p型和n型 Bi2Te3纳米线材料的Seebeck系数经过测量分别为260μv／K和-188μV／K(307 K),比同类的块状温差电材料性能高．同时研究了沉积电位对氧化铝模板中纳米孔的填充率的影响,并对纳米线阵列的电阻进行了测量．尝试了利用n型和p型Bi2Te3纳米线阵列制备一种新型的微型温差发电器．
Thermoelectric nanowire arrays have been successfully fabricated by electrochemical deposition of Bi2Te3 into the nanopores of alumina template. The morphologies and structure of the Bi2Te3 nanowires have been characterized using SEM, XRD and TEM. The composition of nanowires was analyzed and thermoelectric properties of the nanowire arrays were measured. The measurements show that the seebeck coefficients of p-type and n-type Bi2Te3 nanowire arrays are about 260 μV/K and -188 μV/K at 307 K separately, greater than that of bulk material. The effect of potential on the filling ratio of thermoelectric material in alumina pores was also studied and the resistance of nanowire arrays was also measured. A new type of thermoelectric micro-generator is fabricated, which is composed of n- and p-type Bi2Te3 nanowire arrays.
出处
《纳米技术与精密工程》
CAS
CSCD
2006年第1期20-24,共5页
Nanotechnology and Precision Engineering
基金
Supported by the National Science foundation under grant(50071040).
