Volume 60, Issue 16 pp. 8668-8672
Communication

Traceless Removal of Two Kernel Atoms in a Gold Nanocluster and Its Impact on Photoluminescence

Yue Zhou

Yue Zhou

Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, CAS Center for Excellence in Nanoscience, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, Anhui, 230031 P. R. China

University of Science and Technology of China, Hefei, 230026 P. R. China

These authors contributed equally to this work.

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Dr. Lingwen Liao

Dr. Lingwen Liao

Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, CAS Center for Excellence in Nanoscience, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, Anhui, 230031 P. R. China

Institute of Physical Science and Information Technology, Anhui University, Hefei, 230601 P. R. China

These authors contributed equally to this work.

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Dr. Shengli Zhuang

Dr. Shengli Zhuang

Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, CAS Center for Excellence in Nanoscience, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, Anhui, 230031 P. R. China

Institute of Physical Science and Information Technology, Anhui University, Hefei, 230601 P. R. China

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Yan Zhao

Yan Zhao

Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, CAS Center for Excellence in Nanoscience, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, Anhui, 230031 P. R. China

Institute of Physical Science and Information Technology, Anhui University, Hefei, 230601 P. R. China

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Dr. Zibao Gan

Dr. Zibao Gan

Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, CAS Center for Excellence in Nanoscience, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, Anhui, 230031 P. R. China

Institute of Physical Science and Information Technology, Anhui University, Hefei, 230601 P. R. China

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Wanmiao Gu

Wanmiao Gu

Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, CAS Center for Excellence in Nanoscience, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, Anhui, 230031 P. R. China

University of Science and Technology of China, Hefei, 230026 P. R. China

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Prof. Dr. Jin Li

Prof. Dr. Jin Li

Tsinghua University-Peking University Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084 P. R. China

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Prof. Dr. Haiteng Deng

Prof. Dr. Haiteng Deng

MOE Key Laboratory of Bioinformatics, School of Life Sciences, Tsinghua University, Beijing, 100084 P. R. China

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Dr. Nan Xia

Corresponding Author

Dr. Nan Xia

Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, CAS Center for Excellence in Nanoscience, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, Anhui, 230031 P. R. China

Institute of Physical Science and Information Technology, Anhui University, Hefei, 230601 P. R. China

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Prof. Dr. Zhikun Wu

Corresponding Author

Prof. Dr. Zhikun Wu

Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, CAS Center for Excellence in Nanoscience, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, Anhui, 230031 P. R. China

Institute of Physical Science and Information Technology, Anhui University, Hefei, 230601 P. R. China

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First published: 29 January 2021
Citations: 69

Graphical Abstract

Two novel nanoclusters Au48(m-MB)26 and Au46(m-MBT)26 have been synthesized and fully characterized, and the traceless removal of two kernel atoms in metal nanoclusters has been achieved for the first time. The two kernel atoms reduction leads to the photoluminescence quantum yield (QY) increase by almost four times. In addition, kernel bond length dependent photoluminescence and kernel charge state were first revealed.

Abstract

Removing or adding kernel atoms of metal nanoclusters (NCs) without leaving a trace is a substantial challenge because the kernel atoms are inside and covered by the outer staples. However, such kernel tuning is very important for improving the properties and acquiring an in-depth understanding of the kernel-property correlation. Photoluminescence (PL) is one of the most intriguing characteristics of metal NCs but has not been well understood until now. Inspired by these challenges/questions, we conducted this study and, for the first time, achieved the traceless removal of two kernel atoms in a gold nanocluster by applying a simple thermal treatment and revealed its impact on PL. Further, we demonstrated that the kernel Au-Au bond length can be an indicator for a comparison of the PL or kernel charge state between nanoclusters with similar kernel structures and sizes.

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