A Novel Bio-Inspired Ag/3D-TiO2/Si SERS Substrate with Ordered Moth-like Structure

This paper reports a novel method to fabricate a bio-inspired SERS substrate with low reflectivity, ultra-sensitivity, excellent uniformity, and recyclability. First, double layers of polystyrene spheres with different particle sizes were assembled on the surface of a silicon wafer to act as a moth-like template. Second, through the template sacrifice method, the TiO2 film with a three-dimensional moth-like eye structure was induced by the double-layer polystyrene spheres in the previous step, and its microscopic morphology showed a high degree of order. Finally, Ag nanoparticles were assembled on the TiO2 film to form a bio-inspired SERS substrate. This ordered bio-inspired structure can not only reduce reflection, but also reinforce the uniformity of hotspot density, which helps to improve the sensitivity and uniformity of the Raman signal. This bio-inspired SERS substrate can detect R6G molecules at a concentration as low as 1.0 × 10−10 mol/L, and its enhancement factor (EF) can reach 6.56 × 106. In addition, the composite of Ag and TiO2 can realize the photocatalytic degradation of R6G and then realize the recyclability of the SERS substrate.

[1]  Tyler J. Dill,et al.  Metasurface-Enhanced Raman Spectroscopy (mSERS) for Oriented Molecular Sensing. , 2022, ACS applied materials & interfaces.

[2]  J. Aizpurua,et al.  Molecular Optomechanics Approach to Surface-Enhanced Raman Scattering , 2022, Accounts of chemical research.

[3]  Bilu Liu,et al.  Femtomolar‐Level Molecular Sensing of Monolayer Tungsten Diselenide Induced by Heteroatom Doping with Long‐Term Stability , 2022, Advanced Functional Materials.

[4]  Feng Liang,et al.  Probing the Intermediates of Catalyzed Dehydration Reactions of Primary Amide to Nitrile in Plasmonic Junctions , 2022, ACS Catalysis.

[5]  G. Tumcharern,et al.  Reduced graphene oxide on silver nanoparticle layers-decorated titanium dioxide nanotube arrays as SERS-based sensor for glyphosate direct detection in environmental water and soil. , 2022, Journal of hazardous materials.

[6]  Shi Xuan Leong,et al.  Inducing ring complexation for efficient capturing and detection of small gaseous molecules using SERS for environmental surveillance. , 2022, Angewandte Chemie.

[7]  G. Sotiriou,et al.  SERS Hotspot Engineering by Aerosol Self‐Assembly of Plasmonic Ag Nanoaggregates with Tunable Interparticle Distance , 2022, Advanced science.

[8]  Geoffrey I N Waterhouse,et al.  A molecularly-imprinted SERS sensor based on a TiO2@Ag substrate for the selective capture and sensitive detection of tryptamine in foods. , 2022, Food chemistry.

[9]  Wei Wang,et al.  Surface-enhanced Raman spectroscopy enabled evaluation of bacterial inactivation. , 2022, Water research.

[10]  Faiz Ullah Shah,et al.  Phosphonium-Based Ionic Liquid Significantly Enhances SERS of Cytochrome c on TiO2 Nanotube Arrays , 2022, ACS applied materials & interfaces.

[11]  Yongqiang Dong,et al.  Hybridizing Silver Nanoparticles in Hydrogel for High-Performance Flexible SERS Chips. , 2022, ACS applied materials & interfaces.

[12]  H. Pei,et al.  Perovskite Mediated Vibronic Coupling of Semiconducting SERS for Biosensing , 2022, Advanced Functional Materials.

[13]  A. Agrawal,et al.  Broadband Nanoscale Surface‐Enhanced Raman Spectroscopy by Multiresonant Nanolaminate Plasmonic Nanocavities on Vertical Nanopillars , 2022, Advanced Functional Materials.

[14]  Chunyuan Song,et al.  DNA walker-powered ratiometric SERS cytosensor of circulating tumor cells with single-cell sensitivity. , 2022, Biosensors & bioelectronics.

[15]  Gou-Jen Wang,et al.  Surface plasmon-enhanced fluorescence and surface-enhanced Raman scattering dual-readout chip constructed with silver nanowires: Label-free clinical detection of direct-bilirubin. , 2022, Biosensors & bioelectronics.

[16]  T. Kang,et al.  Sensitive and reproducible detection of SARS-CoV-2 using SERS-based microdroplet sensor , 2022, Chemical Engineering Journal.

[17]  Pinghui Wu,et al.  Thermal tuning of terahertz metamaterial absorber properties based on VO2. , 2022, Physical chemistry chemical physics : PCCP.

[18]  Hui Huang,et al.  Dielectric Walls/Layers Modulated 3D Periodically Structured SERS Chips: Design, Batch Fabrication, and Applications , 2022, Advanced science.

[19]  Zhezhe Wang,et al.  Si/TiO2/Ag Multistorey Structures with Interfacial Charge Transfer for a Recyclable Surface-Enhanced Raman Scattering Substrate. , 2022, ACS applied materials & interfaces.

[20]  Bo Dai,et al.  Multi-mode surface plasmon resonance absorber based on dart-type single-layer graphene , 2022, RSC advances.

[21]  Gang Shi,et al.  A Simple Polypyrrole/Polyvinylidene Fluoride Membrane with Hydrophobic and Self-Floating Ability for Solar Water Evaporation , 2022, Nanomaterials.

[22]  Wei Zhou,et al.  Microporous Multiresonant Plasmonic Meshes by Hierarchical Micro-Nanoimprinting for Bio-Interfaced SERS Imaging and Nonlinear Nano-Optics. , 2022, Small.

[23]  Wenxing Yang,et al.  Realization of 18.97% theoretical efficiency of 0.9 μm thick c-Si/ZnO heterojunction ultrathin-film solar cells via surface plasmon resonance enhancement. , 2022, Physical chemistry chemical physics : PCCP.

[24]  I. Ford,et al.  Positively Charged Additives Facilitate Incorporation in Inorganic Single Crystals , 2022, Chemistry of materials : a publication of the American Chemical Society.

[25]  G. Shi,et al.  A hierarchical SiPN/CN/MoSx photocathode with low internal resistance and strong light-absorption for solar hydrogen production , 2022, Applied Catalysis B: Environmental.

[26]  Jiao Yang,et al.  Improved SERS sensitivity of TiO2 nanorod films by annealing in vacuum , 2021, Vacuum.

[27]  Zhimin Liu,et al.  Ultra-wideband and wide-angle perfect solar energy absorber based on Ti nanorings surface plasmon resonance. , 2021, Physical chemistry chemical physics : PCCP.

[28]  G. Shi,et al.  A novel photothermal, self-healing and anti-reflection water evaporation membrane. , 2021, Soft matter.

[29]  Lei Feng,et al.  Noncontact Metal–Spiropyran–Metal Nanostructured Substrates with Ag and Au@SiO2 Nanoparticles Deposited in Nanohole Arrays for Surface-Enhanced Fluorescence and Trace Detection of Metal Ions , 2021 .

[30]  Zhikun Wu,et al.  Unravelling the Structure of a Medium-Sized Metalloid Gold Nanocluster and its Filming Property. , 2021, Angewandte Chemie.

[31]  Yandong Wang,et al.  Light-Trapping SERS Substrate with Regular Bioinspired Arrays for Detecting Trace Dyes. , 2021, ACS applied materials & interfaces.

[32]  Pinghui Wu,et al.  A switchable terahertz device combining ultra-wideband absorption and ultra-wideband complete reflection. , 2022, Physical chemistry chemical physics : PCCP.

[33]  Pinghui Wu,et al.  A four-band and polarization-independent BDS-based tunable absorber with high refractive index sensitivity. , 2021, Physical chemistry chemical physics : PCCP.

[34]  G. Shi,et al.  Fabrication of a Three-Dimensional Bionic Si/TiO2/MoS2 Photoelectrode for Efficient Solar Water Splitting , 2020, ACS Applied Energy Materials.

[35]  Dianpeng Qi,et al.  Fabrication of an insect-like compound-eye SERS substrate with 3D Ag nano-bowls and its application in optical sensor , 2020 .

[36]  X. W. Sun,et al.  Irreversible accumulated SERS behavior of the molecule-linked silver and silver-doped titanium dioxide hybrid system , 2020, Nature Communications.

[37]  Chao Zhang,et al.  Graphene-Ag nanoparticles-cicada wings hybrid system for obvious SERS performance and DNA molecular detection. , 2019, Optics express.

[38]  Gang Zhang,et al.  Plasmonic Nanochemistry Based on Nanohole Array. , 2017, ACS nano.

[39]  Liping Zhang,et al.  Fabrication of 3D biomimetic composite coating with broadband antireflection, superhydrophilicity, and double p-n heterojunctions , 2017, Nano Research.

[40]  Ke-wei Xu,et al.  Green in Situ Synthesis of Clean 3D Chestnutlike Ag/WO3-x Nanostructures for Highly Efficient, Recyclable and Sensitive SERS Sensing. , 2017, ACS applied materials & interfaces.

[41]  Hui Wu,et al.  High-Performance Real-Time SERS Detection with Recyclable Ag Nanorods@HfO2 Substrates. , 2016, ACS applied materials & interfaces.

[42]  Q. Yan,et al.  Thermal annealing of colloidal monolayer at the air/water interface: a facile approach to transferrable colloidal masks with tunable interstice size for nanosphere lithography , 2012 .

[43]  J. Ketterson,et al.  Silver-coated inverse opals formed from polystyrene spheres for surface-enhanced Raman scattering , 2011 .

[44]  L. Chi,et al.  Fabrication of TiO2 arrays using solvent-assisted soft lithography. , 2009, Langmuir : the ACS journal of surfaces and colloids.

[45]  Yoshio Kobayashi,et al.  Deposition of Silver Nanoparticles on Silica Spheres by Pretreatment Steps in Electroless Plating , 2001 .