Self-Scavenging of Electrons in Fe(CO)(5) Aggregates Deposited on Argon Nanoparticles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F16%3A00459080" target="_blank" >RIV/61388955:_____/16:00459080 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1021/acs.jpcc.6b00901" target="_blank" >http://dx.doi.org/10.1021/acs.jpcc.6b00901</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpcc.6b00901" target="_blank" >10.1021/acs.jpcc.6b00901</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Self-Scavenging of Electrons in Fe(CO)(5) Aggregates Deposited on Argon Nanoparticles

Popis výsledku v původním jazyce

We report a dramatic difference in electron-induced decomposition of aggregates of iron pentacarbonyl [Fe(CO)(5)] when compared to its isolated form. The aggregates are deposited on free argon nanoparticles (clusters) with the mean size of several hundreds of atoms and interact with an electron beam of 0-25 eV energy. The negatively charged products are analyzed mass spectroscopically. These products of various Fe/CO composition always desorb from the cluster surface; no mixed anion-Ar fragments are detected. While anions containing one iron atom show strong resonances at low electron energies (<1 eV), the yields of more complex anions show broad bands at electron energies above 5 eV. We postulate a two-center process that involves electronic excitation of one aggregate constituent and attachment of the electron with low residual energy to another aggregate constituent. The dimer anion formation appears to determine completely the aggregation of larger complexes. We draw implications of the present findings to the electron-induced chemistry behind focused electron beam induced deposition.

Název v anglickém jazyce

Self-Scavenging of Electrons in Fe(CO)(5) Aggregates Deposited on Argon Nanoparticles

Popis výsledku anglicky

We report a dramatic difference in electron-induced decomposition of aggregates of iron pentacarbonyl [Fe(CO)(5)] when compared to its isolated form. The aggregates are deposited on free argon nanoparticles (clusters) with the mean size of several hundreds of atoms and interact with an electron beam of 0-25 eV energy. The negatively charged products are analyzed mass spectroscopically. These products of various Fe/CO composition always desorb from the cluster surface; no mixed anion-Ar fragments are detected. While anions containing one iron atom show strong resonances at low electron energies (<1 eV), the yields of more complex anions show broad bands at electron energies above 5 eV. We postulate a two-center process that involves electronic excitation of one aggregate constituent and attachment of the electron with low residual energy to another aggregate constituent. The dimer anion formation appears to determine completely the aggregation of larger complexes. We draw implications of the present findings to the electron-induced chemistry behind focused electron beam induced deposition.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

—

Projekt

<a href="/cs/project/GA14-08937S" target="_blank" >GA14-08937S: Atmosférické klastry a aerosoly: Experimenty v molekulových paprscích a teorie</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Physical Chemistry C

ISSN

1932-7447

e-ISSN

—

Svazek periodika

120

Číslo periodika v rámci svazku

13

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

7397-7402

Kód UT WoS článku

000373862700054

EID výsledku v databázi Scopus

2-s2.0-84964502560