Size-dependent thermal conductivity of individual single-crystalline PbTe nanowires
Jong Wook RohYonsei University 1 Department of Materials Science and Engineering, , 262 Seongsanno, Seoul 120-749, Republic of KoreaSo Young JangKorea University 2 Department of Chemistry, , Jochiwon 339-700, Republic of KoreaJoohoon KangYonsei University 1 Department of Materials Science and Engineering, , 262 Seongsanno, Seoul 120-749, Republic of KoreaSeunghyun LeeYonsei University 1 Department of Materials Science and Engineering, , 262 Seongsanno, Seoul 120-749, Republic of KoreaJin‐Seo NohYonsei University 1 Department of Materials Science and Engineering, , 262 Seongsanno, Seoul 120-749, Republic of KoreaWoochul KimYonsei University 3 School of Mechanical Engineering, , 262 Seongsanno, Seoul 120-749, Republic of KoreaJeunghee ParkKorea University 2 Department of Chemistry, , Jochiwon 339-700, Republic of KoreaWooyoung LeeYonsei University 1 Department of Materials Science and Engineering, , 262 Seongsanno, Seoul 120-749, Republic of Korea
2010en
ABI
Аннотация
We investigated the thermal conductivity of individual single-crystalline PbTe nanowires grown by a chemical vapor transport method. Thermal conductivities of PbTe nanowires 182–436 nm in diameter were measured using suspended microdevices. The thermal conductivity of a PbTe nanowire appeared to decrease with decreasing nanowire diameter and was measured to be 1.29 W/mK for a 182 nm nanowire at 300 K, which is about half of that of bulk PbTe. Our results indicate that phonon transport through a PbTe nanowire is effectively suppressed by the enhanced phonon boundary scattering due to size effects.
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