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000639471 1001_ $$aGuo, Yingjian$$b0
000639471 245__ $$aBiopolymer‐Templated Hierarchical 3D‐Structured Gold Nanoparticle/Graphene Oxide Hybrid Materials for Ultrasensitive Surface‐Enhanced Raman Scattering
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000639471 520__ $$aSurface-enhanced Raman scattering (SERS) is a highly advantageous analytical technique for detecting trace biological and chemical compounds. However, significant challenges remain in the cost-effective fabrication of large-area and homogenous SERS substrates. A simple and scalable approach utilizing a layer-by-layer spray deposition followed by thermal annealing is proposed to fabricate cellulose nanofibril (CNF) films loaded with gold nanoparticles (Au NPs) and graphene oxide (GO) hybrids as SERS substrates. These hybrid 3D structures comprising CNF/Au NPs/GO significantly enhance SERS sensitivity by both electromagnetic enhancement and chemical enhancement. Incorporating CNF as a 3D network enables a more uniform distribution of Au NPs/GO. Thermal annealing further induces hotspots. For instance, the annealed CNF/Au NPs/GO hybrid thin films achieve a detection limit of 1.0 × 10$^{−13}$ m and a high enhancement factor of 4.97 × 1011 for Rhodamine 6G. Grazing incidence small-angle X-ray scattering combined with nano-Fourier-transform infrared spectroscopy is first used to confirm the combined Raman enhancement mechanism of localized surface plasmon resonance and interface charge transfer with high spatial resolution. Therefore, the proposed methodology establishes a robust framework for the scalable fabrication of ultrasensitive SERS substrates.
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000639471 7001_ $$0P:(DE-H253)PIP1101059$$aPan, Guangjiu$$b1
000639471 7001_ $$0P:(DE-H253)PIP1093243$$aTu, Suo$$b2
000639471 7001_ $$0P:(DE-H253)PIP1098114$$aBulut, Yusuf$$b3
000639471 7001_ $$0P:(DE-H253)PIP1097822$$aZhou, Jungui$$b4
000639471 7001_ $$0P:(DE-H253)PIP1084046$$aJeromin, Arno$$b5
000639471 7001_ $$0P:(DE-H253)PIP1019138$$aKeller, Thomas F.$$b6
000639471 7001_ $$0P:(DE-H253)PIP1012873$$aStierle, Andreas$$b7
000639471 7001_ $$0P:(DE-H253)PIP1101201$$aNemeth, Gergely$$b8
000639471 7001_ $$aBorondics, Ferenc$$b9
000639471 7001_ $$0P:(DE-H253)PIP1096609$$aSochor, Benedikt$$b10
000639471 7001_ $$0P:(DE-HGF)0$$aVayalil, Sarathlal Koyiloth$$b11
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000639471 7001_ $$0P:(DE-H253)PIP1007825$$aMüller-Buschbaum, Peter$$b13
000639471 7001_ $$0P:(DE-H253)PIP1003299$$aRoth, Stephan$$b14$$eCorresponding author$$udesy
000639471 773__ $$0PERI:(DE-600)2039420-2$$a10.1002/adfm.202515801$$gp. e15801$$n8$$pe15801$$tAdvanced functional materials$$v36$$x1616-301X$$y2025
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