11 research outputs found
Smooth and flexible filler-nanocellulose composite structure for printed electronics applications
Fabrication of micron scale metallic structures on photo paper substrates by low temperature photolithography for device applications
Properties and Printability of Inkjet and Screen-Printed Silver Patterns for RFID Antennas
Hierarchical Nanogaps within Bioscaffold Arrays as a High-Performance SERS Substrate for Animal Virus Biosensing
A three-dimensional (3D) biomimetic SERS substrate with hierarchical nanogaps was formed on the bioscaffold arrays of cicada wings by one-step and reagents-free ion-sputtering techniques. This approach requires a minimal fabrication effort and cost and offers Ag nanoislands and Ag nanoflowers with four types of nanogaps (<10 nm) on the chitin nanopillars to generate a high density of hotspots (similar to 2000/mu m(2)). The 3D biomimetic substrate shows a low detection limit to Rhodamine 6G (10(-13) M), high average enhancement factor (EF, 5.8 X 10(7)), excellent signal uniformity (5.4%), good stability, and suitability in biosensing. Furthermore, the finite-difference time-domain (FDTD) electric-field-distribution simulations illustrate that the 3D biomimetic SERS substrate provides the high-density hotspot area within a detection volumem, resulting in enormous SERS enhancement. In addition, the conspicuous far-field plasmon resonance peaks were not found to be a strong requirement for a high EF in 3D biomimetic substrates. Additionally, the novel substrate was applied in label-free animal virusesdetection and differentiation with small amounts (1.0 mu L) and low concentrations of analyte (1 x 10(3) PFU/mL), and it exhibited potential as an effective SERS platform for virus detection and sensing