TY - JOUR
T1 - Tuning electronic properties of metallic atom in bondage to a nanospace
AU - Tang, Jun
AU - Xing, Gengmei
AU - Yuan, Hui
AU - Cao, Wenbin
AU - Jing, Long
AU - Gao, Xingfa
AU - Qu, Li
AU - Cheng, Yue
AU - Ye, Chang
AU - Zhao, Yuliang
AU - Chai, Zhifang
AU - Ibrahim, Kurash
AU - Qian, Haijie
AU - Su, Run
PY - 2005/5/12
Y1 - 2005/5/12
N2 - The possibility of modulating the electronic configurations of the innermost atoms inside a nanospace, nano sheath with chemical modification was investigated using synchrotron X-ray photoelectron spectroscopy. Systems of definite nanostructures were chosen for this study. Systematic variations in energy, intensity, and width of π* and σ* O 1s core level spectra, in absorption characteristics of C 1s→π* transition, in photoabsorption of pre-edge and resonance regions of the Gd 4d→4f transition, were observed for Gd@C82 (an isolated nanospace for Gd), Gd@C82(OH)12 (a modified nanospace for Gd), and Gd@C 82(OH)22 (a differently modified nanospace for Gd), and the reference materials Gd-DTPA (a semi-closed space for Gd) and Gd 2O3. A sandwich-type electronic interaction along [outer modification group]-[nano sheaths]-[inner metallic atom] was observed in the molecules of modifications. This makes it possible to control electron-donation directions, either from the innermost metallic atom toward the outer nano sheaths or the reverse. The results suggest that one may effectively tune the fine structures of electronic configurations of such a metallic atom being astricted into nanostructures through changing the number or category of outer groups of chemical modifications. This may open a door to realizing the desired designs for electronic and magnetic properties of functionalized nanomaterials.
AB - The possibility of modulating the electronic configurations of the innermost atoms inside a nanospace, nano sheath with chemical modification was investigated using synchrotron X-ray photoelectron spectroscopy. Systems of definite nanostructures were chosen for this study. Systematic variations in energy, intensity, and width of π* and σ* O 1s core level spectra, in absorption characteristics of C 1s→π* transition, in photoabsorption of pre-edge and resonance regions of the Gd 4d→4f transition, were observed for Gd@C82 (an isolated nanospace for Gd), Gd@C82(OH)12 (a modified nanospace for Gd), and Gd@C 82(OH)22 (a differently modified nanospace for Gd), and the reference materials Gd-DTPA (a semi-closed space for Gd) and Gd 2O3. A sandwich-type electronic interaction along [outer modification group]-[nano sheaths]-[inner metallic atom] was observed in the molecules of modifications. This makes it possible to control electron-donation directions, either from the innermost metallic atom toward the outer nano sheaths or the reverse. The results suggest that one may effectively tune the fine structures of electronic configurations of such a metallic atom being astricted into nanostructures through changing the number or category of outer groups of chemical modifications. This may open a door to realizing the desired designs for electronic and magnetic properties of functionalized nanomaterials.
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U2 - 10.1021/jp050374k
DO - 10.1021/jp050374k
M3 - Article
C2 - 16852042
AN - SCOPUS:19944385283
VL - 109
SP - 8779
EP - 8785
JO - Journal of Physical Chemistry B
JF - Journal of Physical Chemistry B
SN - 1520-6106
IS - 18
ER -