Vibrational properties of Au and Cu nanocrystals formed by ion implantation

P. Kluth; B. Johannessen; L. L. Araujo; M. C. Ridgway

doi:10.1063/1.2644645

Vibrational properties of Au and Cu nanocrystals formed by ion implantation

P. Kluth^*, B. Johannessen, L. L. Araujo, M. C. Ridgway

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

12 Citations (Scopus)

Abstract

Au and Cu Nanocrystals (NCs) were fabricated using ion implantation into SiO₂ and subsequent thermal annealing. Vibrational properties were studied using extended x-ray absorption fine structure (EXAFS) spectroscopy at measurement temperatures between 15 and 300 K. Einstein temperatures were extracted and show a significant decrease for 3.3 nm Cu NCs as compared to bulk Cu. Au NCs, however, show no significant change in the Einstein temperature even at a size of 2.5 nm. The influence of the competing processes of softening of the vibrational density of states due to under-coordinated surface atoms and stiffening of the NC core atoms due to surface tension effects are discussed.

Original language	English
Title of host publication	X-RAY ABSORPTION FINE STRUCTURE - XAFS13
Subtitle of host publication	13th International Conference
Pages	731-733
Number of pages	3
DOIs	https://doi.org/10.1063/1.2644645
Publication status	Published - 2007
Event	X-RAY ABSORPTION FINE STRUCTURE - XAFS13: 13th International Conference - Stanford, CA, United States Duration: 9 Jul 2006 → 14 Jul 2006

Publication series

Name	AIP Conference Proceedings
Volume	882
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	X-RAY ABSORPTION FINE STRUCTURE - XAFS13: 13th International Conference
Country/Territory	United States
City	Stanford, CA
Period	9/07/06 → 14/07/06

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10.1063/1.2644645

Cite this

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title = "Vibrational properties of Au and Cu nanocrystals formed by ion implantation",

abstract = "Au and Cu Nanocrystals (NCs) were fabricated using ion implantation into SiO2 and subsequent thermal annealing. Vibrational properties were studied using extended x-ray absorption fine structure (EXAFS) spectroscopy at measurement temperatures between 15 and 300 K. Einstein temperatures were extracted and show a significant decrease for 3.3 nm Cu NCs as compared to bulk Cu. Au NCs, however, show no significant change in the Einstein temperature even at a size of 2.5 nm. The influence of the competing processes of softening of the vibrational density of states due to under-coordinated surface atoms and stiffening of the NC core atoms due to surface tension effects are discussed.",

keywords = "EXAFS, Ion implantation, Metal nanocrystals, Vibrational properties",

author = "P. Kluth and B. Johannessen and Araujo, {L. L.} and Ridgway, {M. C.}",

year = "2007",

doi = "10.1063/1.2644645",

language = "English",

isbn = "0735403848",

series = "AIP Conference Proceedings",

pages = "731--733",

booktitle = "X-RAY ABSORPTION FINE STRUCTURE - XAFS13",

note = "X-RAY ABSORPTION FINE STRUCTURE - XAFS13: 13th International Conference ; Conference date: 09-07-2006 Through 14-07-2006",

}

Kluth, P, Johannessen, B, Araujo, LL & Ridgway, MC 2007, Vibrational properties of Au and Cu nanocrystals formed by ion implantation. in X-RAY ABSORPTION FINE STRUCTURE - XAFS13: 13th International Conference. AIP Conference Proceedings, vol. 882, pp. 731-733, X-RAY ABSORPTION FINE STRUCTURE - XAFS13: 13th International Conference, Stanford, CA, United States, 9/07/06. https://doi.org/10.1063/1.2644645

TY - GEN

T1 - Vibrational properties of Au and Cu nanocrystals formed by ion implantation

AU - Kluth, P.

AU - Johannessen, B.

AU - Araujo, L. L.

AU - Ridgway, M. C.

PY - 2007

Y1 - 2007

N2 - Au and Cu Nanocrystals (NCs) were fabricated using ion implantation into SiO2 and subsequent thermal annealing. Vibrational properties were studied using extended x-ray absorption fine structure (EXAFS) spectroscopy at measurement temperatures between 15 and 300 K. Einstein temperatures were extracted and show a significant decrease for 3.3 nm Cu NCs as compared to bulk Cu. Au NCs, however, show no significant change in the Einstein temperature even at a size of 2.5 nm. The influence of the competing processes of softening of the vibrational density of states due to under-coordinated surface atoms and stiffening of the NC core atoms due to surface tension effects are discussed.

AB - Au and Cu Nanocrystals (NCs) were fabricated using ion implantation into SiO2 and subsequent thermal annealing. Vibrational properties were studied using extended x-ray absorption fine structure (EXAFS) spectroscopy at measurement temperatures between 15 and 300 K. Einstein temperatures were extracted and show a significant decrease for 3.3 nm Cu NCs as compared to bulk Cu. Au NCs, however, show no significant change in the Einstein temperature even at a size of 2.5 nm. The influence of the competing processes of softening of the vibrational density of states due to under-coordinated surface atoms and stiffening of the NC core atoms due to surface tension effects are discussed.

KW - EXAFS

KW - Ion implantation

KW - Metal nanocrystals

KW - Vibrational properties

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U2 - 10.1063/1.2644645

DO - 10.1063/1.2644645

M3 - Conference contribution

SN - 0735403848

SN - 9780735403840

T3 - AIP Conference Proceedings

SP - 731

EP - 733

BT - X-RAY ABSORPTION FINE STRUCTURE - XAFS13

T2 - X-RAY ABSORPTION FINE STRUCTURE - XAFS13: 13th International Conference

Y2 - 9 July 2006 through 14 July 2006

ER -

Vibrational properties of Au and Cu nanocrystals formed by ion implantation

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