Efficient decoration of graphene oxide with a narrow size distribution of noble metal nanoparticles : green reduction and integration into a thermoelastic composite

Vella, Daniele (avtor), Vengust, Damjan (avtor), Umek, Polona (avtor), Rezaei, Ali (avtor), Jezeršek, Matija (avtor), Mrzel, Aleš (avtor)

We have developed a significantly enhanced method for the effective and homogeneous decoration of graphene oxide (GO) and reduced graphene oxide (r-GO) flakes with gold (Au) and platinum (Pt) nanoparticles. This method involves the direct nucleation of nanoparticles on the surface of dispersed GO through a single-step reaction. By carefully controlling the stepwise introduction of gold and platinum complexes at elevated temperatures, without additional reducing agents, we successfully achieved a homogeneous distribution of Au and Pt nanoparticles, ∼ 20 nm and ∼ 3 nm in size, densely covering the GO sheets. The decoration yield in a mass ratio between Au and GO was up to 20 %. Reduced GO with attached gold and platinum nanoparticles was obtained using ascorbic acid as a reducing agent. Finally, we embedded Au-decorated r-GO in polydimethylsiloxane (PDMS) to form a composite. We show how this stable hybrid material composite can be spin-coated to form a thin thermoelastic film on a flexible substrate, enabling promising photoacoustic properties that could be exploited further in biomedical applications.

• Jezik: Angleški jezik
• Ključne besede: graphene oxide, decoration, nanoparticles, nanocomposites
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2025
• Št. strani: 10 str.
• Številčenje: Vol. 313, art. 117894
• PID: 20.500.12556/RUL-169563
• UDK: 621.7+621.9
• ISSN pri članku: 1879-3290
• DOI: 10.1016/j.synthmet.2025.117894
• COBISS.SI-ID: 238129667
• Datum objave v RUL: 04.06.2025

Gradivo je del revije

• Naslov: Synthetic metals
• Skrajšan naslov: Synth. met.
• Založnik: Elsevier
• ISSN: 1879-3290
• COBISS.SI-ID: 175353347

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: grafenov oksid, nanodelci, nanokompoziti, oksidi

Projekti

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: J7-50094
• Naslov: Piezofotonski kompoziti na osnovi dvodimenzionalnih materialov za ultrazvočno stimulacijo v bioloških sistemih (2D-UltraS)

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: P2-0392
• Naslov: Optodinamika