EPR study of Mn2+ electronic states for the nanosized ZnS:Mn powder modified by acrylic acid

被引：107

作者：

Igarashi, T ^{[1
]}

Isobe, T ^{[1
]}

Senna, M ^{[1
]}

机构：

[1] KEIO UNIV,FAC SCI & TECHNOL,DEPT APPL CHEM,KOHOKU KU,YOKOHAMA,KANAGAWA 223,JAPAN

来源：

PHYSICAL REVIEW B | 1997年 / 56卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.56.6444

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The photoluminescence intensity at 580 nm for 2-3 nm ZnS doped with Mn2+ (ZnS:Mn) increases after modification by acrylic acid (AA). Mn2+ electronic states are examined by electron paramagnetic resonance (EPR) spectroscopy. Signal I with g = 2.0024 and hyperfine coupling constant \A\ = 6.9 mT and signal II with g = 2.0013 and \A\ = 9.0 mT are observed in the EPR spectrum of unmodified ZnS:Mn. Signal I is assigned to isolated Mn2+ ions substitutionally incorporated in cubic ZnS. The intensity of signal II relative to signal I increases with decreasing the S/Zn ratio, while its intensity decreases after modification of the ZnS:Mn nano-particles by AA. Signal II is, therefore, attributed to the Mn2+ ions near the surface.

引用

页码：6444 / 6445

页数：2

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