Growth and Properties of Superconducting Anisotropic Lead Nanoprisms

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• 作者：Xiao-Min Lin ; Helmut Claus ; Ulrich Welp ; Igor S. Beloborodov ; Wai-Kwong Kwok ; George W. Crabtree ; Heinrich M. Jaeger
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：March 8, 2007
• 年：2007
• 卷：111
• 期：9
• 页码：3548 - 3550
• 全文大小：182K
• 年卷期：v.111,no.9(March 8, 2007)
• ISSN：1932-7455

文摘

Anisotropic Pb nanoprisms were synthesized using high-temperature polyol reduction of lead acetylacetonatethrough a kinetically controlled synthesis. Transmission electron microscopy showed that the majority of theprisms grows along {111} planes. Selected area electron diffraction (SAED) on single prism revealed thatthe anisotropic growth is due to twinning in the growing nuclei. Magnetic measurements on a colloidal depositedfilm exhibited a large magnetic hysteresis that is due to the penetration and pinning of magnetic flux. Thisflux trapping behavior could be due to a possible transition from type I to type II superconductor given thefinite thickness of the prisms (<100 nm) or from the currents flowing in a network of coupled prisms.