Tin Ion Directed Morphology Evolution of Copper Sulfide Nanoparticles and Tuning of Their Plasmonic Properties via Phase Conversion

详细信息    查看全文

• 作者：Lihui Chen ; Masanori Sakamoto ; Mitsutaka Haruta ; Takashi Nemoto ; Ryota Sato ; Hiroki Kurata ; Toshiharu Teranishi
• 刊名：Langmuir
• 出版年：2016
• 出版时间：August 2, 2016
• 年：2016
• 卷：32
• 期：30
• 页码：7582-7587
• 全文大小：431K
• 年卷期：0
• ISSN：1520-5827

文摘

Copper-deficient copper sulfide (Cu_2–xS) nanoparticles (NPs) have been investigated as important hole-based plasmonic materials because of their size, morphology, and carrier density-dependent localized surface plasmon resonance (LSPR) properties. Morphology and carrier density are two important parameters to determine their LSPR properties. Here, we demonstrate that the foreign metal ion, Sn⁴⁺, directs the growth of djurleite Cu₃₁S₁₆ from nanodisk to tetradecahedron along the [100] direction. To control the LSPR properties by tuning the carrier density, the djurleite Cu₃₁S₁₆ nanoparticles were pseudomorphically converted into more copper-deficient (higher carrier density) roxbyite Cu₇S₄ NPs by heat treatment in the presence of amine. The roxbyite Cu₇S₄ NPs exhibited a shorter and stronger LSPR peak while retaining the morphology of the djurleite Cu₃₁S₁₆ NPs.