Composition-dependent electronic energy relaxation dynamics of metal domains as revealed by bimetallic Au144−xAgx(SC8H9)60 monolayer-protected clusters
We examined the electronic relaxation dynamics for mono and bimetallic Au 144− x Ag x (SC 8 H 9 ) 60 monolayer-protected clusters (MPCs) using femtosecond time-resolved transient extinction spectroscopy. MPCs provide compositionally well-defined model systems for structure-specific determination of...
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| Veröffentlicht in: | Physical chemistry chemical physics : PCCP 2017-06, Vol.19 (22), p.14471-14477 |
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| container_title | Physical chemistry chemical physics : PCCP |
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| creator | Zheng, Hongjun Tofanelli, Marcus A Ackerson, Christopher J Knappenberger, Kenneth L |
| description | We examined the electronic relaxation dynamics for mono and bimetallic Au
144−
x
Ag
x
(SC
8
H
9
)
60
monolayer-protected clusters (MPCs) using femtosecond time-resolved transient extinction spectroscopy. MPCs provide compositionally well-defined model systems for structure-specific determination of nanoscale electronic properties. Based on pulse-energy-dependent transient extinction data, we quantified electron-phonon coupling constants for three distinct Au
144−
x
Ag
x
(SC
8
H
9
)
60
MPC samples, where
x
= 0, 0 <
x
< 30, and
x
∼ 30, as
G
x
=0
= (1.61 ± 0.1) × 10
16
W m
−3
K
−1
,
G
x |
| doi_str_mv | 10.1039/c7cp00884h |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_rsc_p</sourceid><recordid>TN_cdi_rsc_primary_c7cp00884h</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>1915323830</sourcerecordid><originalsourceid>FETCH-LOGICAL-j250t-528680d662b6f76c1812b9b765b28749a84ddb6c11ece7dc26acfb1f0b4e8e3e3</originalsourceid><addsrcrecordid>eNqNkb9OwzAQxiMEEqWwsCOZrQwBO04cZ6wqoEiVGIA58p9LSeXYwU5R8wbMbLweT0KgCDbEdKf7fvd9J10UHRN8TjAtLlSuWow5Tx93ohFJGY0LzNPdnz5n-9FBCCuMMckIHUVvM9e0LtRd7WysoQWrwXYIDKjOO1srBBb8skcejNiITwzp3oqmVgG5CjXQCYO0a0RtAxJh4J5BGNBI9kjWX7IZXKZrkqbvL6-b6XIzuZvxeXHGMGqcdUb04OPWu26IHPaUWYcOfDiM9iphAhx913H0cHV5P5vHi9vrm9l0Ea-SDHdxlnDGsWYskazKmSKcJLKQOctkwvO0EDzVWg5zAgpyrRImVCVJhWUKHCjQcTTZ-g4nPK0hdGVTBwXGCAtuHUpSkIwmlFP8DxSTnHGO6YCebFEfVNn6uhG-L3-_M-inf-llqyv6AY4akeg</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1901768803</pqid></control><display><type>article</type><title>Composition-dependent electronic energy relaxation dynamics of metal domains as revealed by bimetallic Au144−xAgx(SC8H9)60 monolayer-protected clusters</title><source>Royal Society Of Chemistry Journals 2008-</source><source>Alma/SFX Local Collection</source><creator>Zheng, Hongjun ; Tofanelli, Marcus A ; Ackerson, Christopher J ; Knappenberger, Kenneth L</creator><creatorcontrib>Zheng, Hongjun ; Tofanelli, Marcus A ; Ackerson, Christopher J ; Knappenberger, Kenneth L</creatorcontrib><description>We examined the electronic relaxation dynamics for mono and bimetallic Au
144−
x
Ag
x
(SC
8
H
9
)
60
monolayer-protected clusters (MPCs) using femtosecond time-resolved transient extinction spectroscopy. MPCs provide compositionally well-defined model systems for structure-specific determination of nanoscale electronic properties. Based on pulse-energy-dependent transient extinction data, we quantified electron-phonon coupling constants for three distinct Au
144−
x
Ag
x
(SC
8
H
9
)
60
MPC samples, where
x
= 0, 0 <
x
< 30, and
x
∼ 30, as
G
x
=0
= (1.61 ± 0.1) × 10
16
W m
−3
K
−1
,
G
x
<30
= (1.74 ± 0.1) × 10
16
W m
−3
K
−1
and
G
x
∼30
= (2.07 ± 0.15) × 10
16
W m
−3
K
−1
, respectively. These results reflect a trend of greater electron-phonon coupling efficiency with increasing silver content. Based on these data, we conclude that gold-atom replacement by silver occurs at surface sites of the 114-atom metal core of the MPC. Definitive determinations of functional response to nanoscale "alloy" formation and dopant inclusion are critical to establishing predictive models for the development of materials that feature nanoparticles as active components.
The influence of nanoscale composition on electronic relaxation is determined using monolayer-protected clusters as structurally precise model systems.</description><identifier>ISSN: 1463-9076</identifier><identifier>EISSN: 1463-9084</identifier><identifier>DOI: 10.1039/c7cp00884h</identifier><language>eng</language><subject>Bimetals ; Clusters ; Coupling ; Dynamics ; Electronics ; Extinction ; Nanostructure ; Silver</subject><ispartof>Physical chemistry chemical physics : PCCP, 2017-06, Vol.19 (22), p.14471-14477</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids></links><search><creatorcontrib>Zheng, Hongjun</creatorcontrib><creatorcontrib>Tofanelli, Marcus A</creatorcontrib><creatorcontrib>Ackerson, Christopher J</creatorcontrib><creatorcontrib>Knappenberger, Kenneth L</creatorcontrib><title>Composition-dependent electronic energy relaxation dynamics of metal domains as revealed by bimetallic Au144−xAgx(SC8H9)60 monolayer-protected clusters</title><title>Physical chemistry chemical physics : PCCP</title><description>We examined the electronic relaxation dynamics for mono and bimetallic Au
144−
x
Ag
x
(SC
8
H
9
)
60
monolayer-protected clusters (MPCs) using femtosecond time-resolved transient extinction spectroscopy. MPCs provide compositionally well-defined model systems for structure-specific determination of nanoscale electronic properties. Based on pulse-energy-dependent transient extinction data, we quantified electron-phonon coupling constants for three distinct Au
144−
x
Ag
x
(SC
8
H
9
)
60
MPC samples, where
x
= 0, 0 <
x
< 30, and
x
∼ 30, as
G
x
=0
= (1.61 ± 0.1) × 10
16
W m
−3
K
−1
,
G
x
<30
= (1.74 ± 0.1) × 10
16
W m
−3
K
−1
and
G
x
∼30
= (2.07 ± 0.15) × 10
16
W m
−3
K
−1
, respectively. These results reflect a trend of greater electron-phonon coupling efficiency with increasing silver content. Based on these data, we conclude that gold-atom replacement by silver occurs at surface sites of the 114-atom metal core of the MPC. Definitive determinations of functional response to nanoscale "alloy" formation and dopant inclusion are critical to establishing predictive models for the development of materials that feature nanoparticles as active components.
The influence of nanoscale composition on electronic relaxation is determined using monolayer-protected clusters as structurally precise model systems.</description><subject>Bimetals</subject><subject>Clusters</subject><subject>Coupling</subject><subject>Dynamics</subject><subject>Electronics</subject><subject>Extinction</subject><subject>Nanostructure</subject><subject>Silver</subject><issn>1463-9076</issn><issn>1463-9084</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNqNkb9OwzAQxiMEEqWwsCOZrQwBO04cZ6wqoEiVGIA58p9LSeXYwU5R8wbMbLweT0KgCDbEdKf7fvd9J10UHRN8TjAtLlSuWow5Tx93ohFJGY0LzNPdnz5n-9FBCCuMMckIHUVvM9e0LtRd7WysoQWrwXYIDKjOO1srBBb8skcejNiITwzp3oqmVgG5CjXQCYO0a0RtAxJh4J5BGNBI9kjWX7IZXKZrkqbvL6-b6XIzuZvxeXHGMGqcdUb04OPWu26IHPaUWYcOfDiM9iphAhx913H0cHV5P5vHi9vrm9l0Ea-SDHdxlnDGsWYskazKmSKcJLKQOctkwvO0EDzVWg5zAgpyrRImVCVJhWUKHCjQcTTZ-g4nPK0hdGVTBwXGCAtuHUpSkIwmlFP8DxSTnHGO6YCebFEfVNn6uhG-L3-_M-inf-llqyv6AY4akeg</recordid><startdate>20170607</startdate><enddate>20170607</enddate><creator>Zheng, Hongjun</creator><creator>Tofanelli, Marcus A</creator><creator>Ackerson, Christopher J</creator><creator>Knappenberger, Kenneth L</creator><scope>7X8</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20170607</creationdate><title>Composition-dependent electronic energy relaxation dynamics of metal domains as revealed by bimetallic Au144−xAgx(SC8H9)60 monolayer-protected clusters</title><author>Zheng, Hongjun ; Tofanelli, Marcus A ; Ackerson, Christopher J ; Knappenberger, Kenneth L</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-j250t-528680d662b6f76c1812b9b765b28749a84ddb6c11ece7dc26acfb1f0b4e8e3e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Bimetals</topic><topic>Clusters</topic><topic>Coupling</topic><topic>Dynamics</topic><topic>Electronics</topic><topic>Extinction</topic><topic>Nanostructure</topic><topic>Silver</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zheng, Hongjun</creatorcontrib><creatorcontrib>Tofanelli, Marcus A</creatorcontrib><creatorcontrib>Ackerson, Christopher J</creatorcontrib><creatorcontrib>Knappenberger, Kenneth L</creatorcontrib><collection>MEDLINE - Academic</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Physical chemistry chemical physics : PCCP</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Zheng, Hongjun</au><au>Tofanelli, Marcus A</au><au>Ackerson, Christopher J</au><au>Knappenberger, Kenneth L</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Composition-dependent electronic energy relaxation dynamics of metal domains as revealed by bimetallic Au144−xAgx(SC8H9)60 monolayer-protected clusters</atitle><jtitle>Physical chemistry chemical physics : PCCP</jtitle><date>2017-06-07</date><risdate>2017</risdate><volume>19</volume><issue>22</issue><spage>14471</spage><epage>14477</epage><pages>14471-14477</pages><issn>1463-9076</issn><eissn>1463-9084</eissn><abstract>We examined the electronic relaxation dynamics for mono and bimetallic Au
144−
x
Ag
x
(SC
8
H
9
)
60
monolayer-protected clusters (MPCs) using femtosecond time-resolved transient extinction spectroscopy. MPCs provide compositionally well-defined model systems for structure-specific determination of nanoscale electronic properties. Based on pulse-energy-dependent transient extinction data, we quantified electron-phonon coupling constants for three distinct Au
144−
x
Ag
x
(SC
8
H
9
)
60
MPC samples, where
x
= 0, 0 <
x
< 30, and
x
∼ 30, as
G
x
=0
= (1.61 ± 0.1) × 10
16
W m
−3
K
−1
,
G
x
<30
= (1.74 ± 0.1) × 10
16
W m
−3
K
−1
and
G
x
∼30
= (2.07 ± 0.15) × 10
16
W m
−3
K
−1
, respectively. These results reflect a trend of greater electron-phonon coupling efficiency with increasing silver content. Based on these data, we conclude that gold-atom replacement by silver occurs at surface sites of the 114-atom metal core of the MPC. Definitive determinations of functional response to nanoscale "alloy" formation and dopant inclusion are critical to establishing predictive models for the development of materials that feature nanoparticles as active components.
The influence of nanoscale composition on electronic relaxation is determined using monolayer-protected clusters as structurally precise model systems.</abstract><doi>10.1039/c7cp00884h</doi><tpages>7</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1463-9076 |
| ispartof | Physical chemistry chemical physics : PCCP, 2017-06, Vol.19 (22), p.14471-14477 |
| issn | 1463-9076 1463-9084 |
| language | eng |
| recordid | cdi_rsc_primary_c7cp00884h |
| source | Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection |
| subjects | Bimetals Clusters Coupling Dynamics Electronics Extinction Nanostructure Silver |
| title | Composition-dependent electronic energy relaxation dynamics of metal domains as revealed by bimetallic Au144−xAgx(SC8H9)60 monolayer-protected clusters |
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