Electronic structure of cobalt nanocrystals suspended in liquid

Hongjian Liu; Jinghua Guo; Yadong Yin; Andreas Augustsson; Chungli Dong; Joseph Nordgren; Chinglin Chang; Paul Alivisatos; Geoff Thornton; D. Frank Ogletree; Felix G. Requejo; Frank de Groot; Miquel Salmeron

doi:10.1021/nl070586o

Electronic structure of cobalt nanocrystals suspended in liquid

Hongjian Liu, Jinghua Guo^*, Yadong Yin, Andreas Augustsson, Chungli Dong, Joseph Nordgren, Chinglin Chang, Paul Alivisatos, Geoff Thornton, D. Frank Ogletree, Felix G. Requejo, Frank de Groot, Miquel Salmeron

^*Corresponding author for this work

Sub Inorganic Chemistry and Catalysis

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

The electronic structure of cobalt nanocrystals suspended in liquid as a function of size has been investigated using in situ X-ray absorption and emission spectroscopy. A sharp absorption peak associated with the ligand molecules is found that increases in intensity upon reducing the nanocrystal size. X-ray Raman features due to d-d and to charge-transfer excitations of ligand molecules are identified. The study reveals the local symmetry of the surface of epsilon-Co phase nanocrystals, which originates from a dynamic interaction between Co nanocrystals and surfactant + solvent molecules.

Original language	English
Pages (from-to)	1919-1922
Number of pages	4
Journal	Nano Letters
Volume	7
Issue number	7
DOIs	https://doi.org/10.1021/nl070586o
Publication status	Published - Jul 2007

Keywords

X-RAY-EMISSION
ABSORPTION SPECTROSCOPY
FLUORESCENCE SPECTROSCOPY
NANOPARTICLES
BEHAVIOR
SPECTRA
SOLIDS
LIGAND
SHAPE
SIZE

Access to Document

10.1021/nl070586o

nl070586oFinal published version, 181 KB

Cite this

@article{469082ed6a9a42c990f4e8b9b4051003,

title = "Electronic structure of cobalt nanocrystals suspended in liquid",

abstract = "The electronic structure of cobalt nanocrystals suspended in liquid as a function of size has been investigated using in situ X-ray absorption and emission spectroscopy. A sharp absorption peak associated with the ligand molecules is found that increases in intensity upon reducing the nanocrystal size. X-ray Raman features due to d-d and to charge-transfer excitations of ligand molecules are identified. The study reveals the local symmetry of the surface of epsilon-Co phase nanocrystals, which originates from a dynamic interaction between Co nanocrystals and surfactant + solvent molecules.",

keywords = "X-RAY-EMISSION, ABSORPTION SPECTROSCOPY, FLUORESCENCE SPECTROSCOPY, NANOPARTICLES, BEHAVIOR, SPECTRA, SOLIDS, LIGAND, SHAPE, SIZE",

author = "Hongjian Liu and Jinghua Guo and Yadong Yin and Andreas Augustsson and Chungli Dong and Joseph Nordgren and Chinglin Chang and Paul Alivisatos and Geoff Thornton and Ogletree, {D. Frank} and Requejo, {Felix G.} and {de Groot}, Frank and Miquel Salmeron",

year = "2007",

month = jul,

doi = "10.1021/nl070586o",

language = "English",

volume = "7",

pages = "1919--1922",

journal = "Nano Letters",

issn = "1530-6984",

publisher = "American Chemical Society",

number = "7",

}

TY - JOUR

T1 - Electronic structure of cobalt nanocrystals suspended in liquid

AU - Liu, Hongjian

AU - Guo, Jinghua

AU - Yin, Yadong

AU - Augustsson, Andreas

AU - Dong, Chungli

AU - Nordgren, Joseph

AU - Chang, Chinglin

AU - Alivisatos, Paul

AU - Thornton, Geoff

AU - Ogletree, D. Frank

AU - Requejo, Felix G.

AU - de Groot, Frank

AU - Salmeron, Miquel

PY - 2007/7

Y1 - 2007/7

N2 - The electronic structure of cobalt nanocrystals suspended in liquid as a function of size has been investigated using in situ X-ray absorption and emission spectroscopy. A sharp absorption peak associated with the ligand molecules is found that increases in intensity upon reducing the nanocrystal size. X-ray Raman features due to d-d and to charge-transfer excitations of ligand molecules are identified. The study reveals the local symmetry of the surface of epsilon-Co phase nanocrystals, which originates from a dynamic interaction between Co nanocrystals and surfactant + solvent molecules.

AB - The electronic structure of cobalt nanocrystals suspended in liquid as a function of size has been investigated using in situ X-ray absorption and emission spectroscopy. A sharp absorption peak associated with the ligand molecules is found that increases in intensity upon reducing the nanocrystal size. X-ray Raman features due to d-d and to charge-transfer excitations of ligand molecules are identified. The study reveals the local symmetry of the surface of epsilon-Co phase nanocrystals, which originates from a dynamic interaction between Co nanocrystals and surfactant + solvent molecules.

KW - X-RAY-EMISSION

KW - ABSORPTION SPECTROSCOPY

KW - FLUORESCENCE SPECTROSCOPY

KW - NANOPARTICLES

KW - BEHAVIOR

KW - SPECTRA

KW - SOLIDS

KW - LIGAND

KW - SHAPE

KW - SIZE

U2 - 10.1021/nl070586o

DO - 10.1021/nl070586o

M3 - Article

SN - 1530-6984

VL - 7

SP - 1919

EP - 1922

JO - Nano Letters

JF - Nano Letters

IS - 7

ER -

Electronic structure of cobalt nanocrystals suspended in liquid

Abstract

Keywords

Access to Document

Fingerprint

Cite this