In-situ generation of Au nanoparticles in poly(methyl methacrylate) films via MeV proton irradiation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F22%3A00552413" target="_blank" >RIV/61389013:_____/22:00552413 - isvavai.cz</a>

Alternative codes found

RIV/60461373:22310/22:43925098 RIV/61389005:_____/22:00552413 RIV/44555601:13440/22:43896314

Result on the web

<a href="https://doi.org/10.1016/j.matchemphys.2021.125205" target="_blank" >https://doi.org/10.1016/j.matchemphys.2021.125205</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.matchemphys.2021.125205" target="_blank" >10.1016/j.matchemphys.2021.125205</a>

Result language

angličtina

Original language name

In-situ generation of Au nanoparticles in poly(methyl methacrylate) films via MeV proton irradiation

Original language description

It has been shown that a radiation-sensitive polymer such as PMMA, which is widely utilised in lithography as a positive resist, can be used to create a flexible nanocomposite with metal nanoparticles by proton irradiation without any additional treatment. Three 50-mu m-thick free-standing polymer films with 4, 10 and 16 wt% of gold were prepared with the spin-coating technique from a mixture of PMMA and hydrogen tetrachloroaurate trihydrate and irradiated with 2-MeV protons. Fluences in the range of 2 x 10(13)-2 x 10(14) protons/cm(2) were used to reduce gold ions to neutral metal atoms with the subsequent formation of nanoparticles. UV-Vis and FTIR spectroscopy was employed to study the Au-nanoparticle coalescence after the radiation modification. AFM and SEM microscopy showed the morphology of the nanoparticles on the polymer surface, while TEM microscopy was used to visualise the nanoparticles formed inside the polymer. It was found that the fluence of the Aunanoparticle formation can be lower than that used in proton-beam lithography on PMMA. Although the freestanding foil allowed generated gases to diffuse from both sides, it did not withstand the high fluence applied to it on the substrate. The concentration of the generated nanoparticles depended both on the primary Au-atom concentration in the PMMA matrix and on the proton irradiation fluence used. In Au-PMMA composites containing 10 and 16 wt% of gold, the fluence of 2 x 10(13) protons/cm(2) was enough to produce a sufficient amount of nanoparticles to obtain the resonance absorption of light, whereas the sample with 4 wt% of gold required a higher proton fluence to exhibit Au-atom coalescence. It has been ascertained that the amount of the nanoparticles synthesized by proton irradiation is directly proportional to the concentration of gold in PMMA and to the proton fluence used. As for the size of the nanoparticles, it is directly proportional to the concentration of gold in PMMA, but inversely proportional to the fluence used.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10404 - Polymer science

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

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

Name of the periodical

Materials Chemistry and Physics

ISSN

0254-0584

e-ISSN

1879-3312

Volume of the periodical

275

Issue of the periodical within the volume

JAN

Country of publishing house

CH - SWITZERLAND

Number of pages

9

Pages from-to

125205

UT code for WoS article

000701734300004

EID of the result in the Scopus database

2-s2.0-85114176064