TY - JOUR
T1 - Sequential organic-inorganic templating and thermoelectric properties of high-aspect-ratio single-crystal lead telluride nanorods
AU - Purkayastha, Arup
AU - Yan, Qingyu
AU - Gandhi, Darshan D.
AU - Li, Huafang
AU - Pattanaik, Gyana
AU - Borca-Tasciuc, Theodorian
AU - Ravishankar, N.
AU - Ramanath, G.
PY - 2008/8/12
Y1 - 2008/8/12
N2 - A new two-step organic-inorganic templating method to synthesize single-crystal PbTe nanorods with high aspect ratios has been demonstrated. During the first step, Te nanotubes were produced by solvothermal reduction of TeO2 in the presence of cetyl ether, a nonionic surfactant brij 52, and L-lysine ethyl ester dihydrochloride, an ionic surfactant. The Te nanotube solution was cooled to 100°C and mixed with aqueous PbCl2. Hydrazine was added to the solution that reduces PbCl2 and transforms the Te nanotubes to single-crystal PbTe nanorods. High-resolution TEM images and selected-area electron diffraction patterns confirmed that each PbTe nanorod was a single crystal, oriented along the [100] direction of the rocksalt structure. It was observed that the nanorod aspect ratio can be tailored by changing the reaction temperature and cetyl ether concentration.
AB - A new two-step organic-inorganic templating method to synthesize single-crystal PbTe nanorods with high aspect ratios has been demonstrated. During the first step, Te nanotubes were produced by solvothermal reduction of TeO2 in the presence of cetyl ether, a nonionic surfactant brij 52, and L-lysine ethyl ester dihydrochloride, an ionic surfactant. The Te nanotube solution was cooled to 100°C and mixed with aqueous PbCl2. Hydrazine was added to the solution that reduces PbCl2 and transforms the Te nanotubes to single-crystal PbTe nanorods. High-resolution TEM images and selected-area electron diffraction patterns confirmed that each PbTe nanorod was a single crystal, oriented along the [100] direction of the rocksalt structure. It was observed that the nanorod aspect ratio can be tailored by changing the reaction temperature and cetyl ether concentration.
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U2 - 10.1021/cm703158f
DO - 10.1021/cm703158f
M3 - Article
AN - SCOPUS:50249153020
SN - 0897-4756
VL - 20
SP - 4791
EP - 4793
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 15
ER -