Synthesis of Ag-decorated SrTiO3-based nanocomposites via solvothermal method using Uncaria gambir Roxb. leaf extract as a bioreductor with enhanced electrical conductivity

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects Pub Date : 2025-02-01 DOI:10.1016/j.nanoso.2025.101447

Yulia Eka Putri , Puji Vajrian Pertiwi , Jumadil Khairani , Halimah Tusadiah-Z. , Diana Vanda Wellia , Dedi Satria , Tio Putra Wendari

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Abstract

The green synthesis of silver-SrTiO₃ (Ag-STO) nanocomposites mediated by gambir (Uncaria gambir Roxb.) leaf extract successfully produced Ag nanoparticles decorated on the surface of SrTiO₃. The extract functions as a bioreductor, facilitating the formation of silver nanoparticles by reducing Ag(I) ions to Ag metal during solvothermal synthesis. Structural analysis confirmed the presence of Ag metal and morphological observations showed that the SrTiO₃ particles are below 50 nm in size and, with their surfaces decorated by Ag particles of about 7 nm in size. Fourier transform infrared spectroscopy spectrum emphasized the vibrational characteristics of the interactions between functional groups on cetyl trimethyl ammonium bromide (CTAB), serving as a capping agent, and tert-butylamine (TBA) as a mineralizer with the SrTiO₃ surface. The optical response measurement confirmed that both Ag and SrTiO₃ display their distinct absorption characteristics, indicating that the band gap energy of the resulting Ag-STO nanocomposite remains unchanged. The electrical conductivity value of Ag-STO nanocomposite reached up to 29 times higher than that of the SrTiO₃ at high temperatures.

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来源期刊

Nano-Structures & Nano-Objects Physics and Astronomy-Condensed Matter Physics

CiteScore

9.20

自引率

0.00%

发文量

审稿时长

22 days

期刊介绍： Nano-Structures & Nano-Objects is a new journal devoted to all aspects of the synthesis and the properties of this new flourishing domain. The journal is devoted to novel architectures at the nano-level with an emphasis on new synthesis and characterization methods. The journal is focused on the objects rather than on their applications. However, the research for new applications of original nano-structures & nano-objects in various fields such as nano-electronics, energy conversion, catalysis, drug delivery and nano-medicine is also welcome. The scope of Nano-Structures & Nano-Objects involves: -Metal and alloy nanoparticles with complex nanostructures such as shape control, core-shell and dumbells -Oxide nanoparticles and nanostructures, with complex oxide/metal, oxide/surface and oxide /organic interfaces -Inorganic semi-conducting nanoparticles (quantum dots) with an emphasis on new phases, structures, shapes and complexity -Nanostructures involving molecular inorganic species such as nanoparticles of coordination compounds, molecular magnets, spin transition nanoparticles etc. or organic nano-objects, in particular for molecular electronics -Nanostructured materials such as nano-MOFs and nano-zeolites -Hetero-junctions between molecules and nano-objects, between different nano-objects & nanostructures or between nano-objects & nanostructures and surfaces -Methods of characterization specific of the nano size or adapted for the nano size such as X-ray and neutron scattering, light scattering, NMR, Raman, Plasmonics, near field microscopies, various TEM and SEM techniques, magnetic studies, etc .