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

Kód výsledku v 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>

Nalezeny alternativní kódy

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

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Materials Chemistry and Physics

ISSN

0254-0584

e-ISSN

1879-3312

Svazek periodika

275

Číslo periodika v rámci svazku

JAN

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

9

Strana od-do

125205

Kód UT WoS článku

000701734300004

EID výsledku v databázi Scopus

2-s2.0-85114176064