Bio-inspired synthesis of protein-encapsulated CoPt nanoparticles

被引：106

作者：

Klem, MT ^{[1
]}

Willits, D

Solis, DJ

Belcher, AM

Young, M

Douglas, T

机构：

[1] Montana State Univ, Dept Chem & Biochem, Ctr Bioinspired Nanomat, Thermal Biol Inst, Bozeman, MT 59717 USA

[2] Montana State Univ, Thermal Biol Inst, Dept Plant Sci, Ctr Bioinspired Nanomat, Bozeman, MT 59717 USA

[3] MIT, Div Biol Engn, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

来源：

ADVANCED FUNCTIONAL MATERIALS | 2005年 / 15卷 / 09期

关键词：

D O I：

10.1002/adfm.200400453

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The 24 subunit heat-shock protein from Methanococcus jannaschii has been genetically altered to display a dodecapeptide on the interior surface that has a strong binding affinity to the L1(0) phase of CoPt (CP_Hsp). Reaction of Co(II) and Pt(II) salts at 65 degrees C under reducing conditions results in the formation of a stable CoPt mineral encapsulated within the protein cage. Metallic particles commensurate in size with the interior dimensions of the protein cage (6.5 +/- 1.3 nm) have been imaged by transmission electron microscopy and are shown to be surrounded by the intact protein cage. Magnetic measurements performed on the encapsulated nanoparticles exhibit room-temperature hysteresis on the order of 150 G (1 G = 10(-4) T) prior to annealing and 610 G after annealing at 650 degrees C.

引用

页码：1489 / 1494

页数：6

共 48 条

[1] Direct fabrication of large micropatterned single crystals [J].