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Nanocellulose-Assisted Thermally Induced Growth of Silver Nanoparticles for Optical Applications.

ABSTRACT: Optically responsive materials are present in everyday life, from screens to sensors. However, fabricating large-area, fossil-free materials for functional biocompatible applications is still a challenge today. Nanocelluloses from various sources, such as wood, can provide biocompatibility and are emerging candidates for templating organic optoelectronics. Silver (Ag) in its nanoscale form shows excellent optical properties. Herein, we combine both materials using thin-film large-area spray-coating to study the fabrication of optical response applications. We characterize the Ag nanoparticle formation by X-ray scattering and UV-vis spectroscopy in situ during growth on the nanocellulose template. The morphology and optical properties of the nanocellulose film are compared to the rigid reference surface SiO₂. Our results clearly show the potential to tailor the energy band gap of the resulting hybrid material.

SUBMITTER: Brett CJ

PROVIDER: S-EPMC8289233 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature

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Nanocellulose-Assisted Thermally Induced Growth of Silver Nanoparticles for Optical Applications.

Brett Calvin J CJ Ohm Wiebke W Fricke Björn B Alexakis Alexandros E AE Laarmann Tim T Körstgens Volker V Müller-Buschbaum Peter P Söderberg L Daniel LD Roth Stephan V SV

ACS applied materials & interfaces 20210607 23

Optically responsive materials are present in everyday life, from screens to sensors. However, fabricating large-area, fossil-free materials for functional biocompatible applications is still a challenge today. Nanocelluloses from various sources, such as wood, can provide biocompatibility and are emerging candidates for templating organic optoelectronics. Silver (Ag) in its nanoscale form shows excellent optical properties. Herein, we combine both materials using thin-film large-area spray-coat ...[more]

PMID: 34096698

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Project description:BackgroundIn recent years, bacterial nanocellulose (BNC) based nanocomposites have been developed to promote healing property and antibacterial activity of BNC wound dressing. Molecular study can help to better understanding about interaction of genes and pathways involved in healing progression.ObjectivesThe aim of this study was to prepare bacterial nanocellulose/silver (BNC/Ag) nanocomposite films as ecofriendly wound dressing in order to assess their physical, cytotoxicity and antimicrobial properties. The in vitro molecular study was performed to evaluate expression of genes involved in healing of wounds after treatment with BNC/Ag biofilms.Study design materials and methodsSilver nanoparticles were formed by using Citrullus colocynthis extract within new isolated bacterial nanocellulose (BNC) RM1. The nanocomposites were characterized using X-ray diffraction, Fourier transform infrared, and field emission scanning electron microscopy. Besides, swelling property and Ag release profile of the nanocomposites were studied. The ability of nanocomposites to promote wound healing of human dermal fibroblast cells in vitro was studied. Bioinformatics databases were used to identify genes with important healing effect. Key genes which interfered with healing were studied by quantitative real time PCR.ResultsSpherical silver nanoparticles with particle size ranging from 20 to 50 nm were synthesized and impregnated within the structure of BNC. The resulting nanocomposites showed significant antibacterial activities with inhibition zones ranging from 7±0.25 to 16.24±0.09 mm against skin pathogenic bacteria. Moreover, it was compatible with human fibroblast cells (HDF) and could promote in vitro wound healing after 48h. Based on bioinformatics databases, the genes of TGF-β1, MMP2, MMP9, CTNNB1, Wnt4, hsa-miR-29b-3p and hsa-miR-29c-3p played important role in wound healing. The nanocomposites had an effect in expression of the genes in healing. Thus, the BNC/Ag nanocomposite can be used to heal wound in a short period and simple manner.ConclusionThis eco-friendly nanocomposite with excellent antibacterial activities and healing property confirming its utility as potential wound dressings.

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Nanocellulose-Assisted Thermally Induced Growth of Silver Nanoparticles for Optical Applications.

Publications

Nanocellulose-Assisted Thermally Induced Growth of Silver Nanoparticles for Optical Applications.

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