Graphene-Based High-Efficiency Surface-Enhanced Raman Scattering-Active Platform for Sensitive and Multiplex DNA Detection

2012 ◽  
Vol 84 (10) ◽  
pp. 4622-4627 ◽  
Author(s):  
Shijiang He ◽  
Keng-Ku Liu ◽  
Shao Su ◽  
Juan Yan ◽  
Xiuhai Mao ◽  
...  
Keyword(s):  
Raman Scattering ◽  
High Efficiency ◽  
Dna Detection ◽  
Surface Enhanced Raman Scattering ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Three-Dimensional Surface-Enhanced Raman Scattering Substrate Fabricated Using Chemical Decoration of Silver Nanoparticles on Electrospun Polycarbonate Nanofibers

2016 ◽  
Vol 71 (5) ◽  
pp. 879-887 ◽  
Author(s):  
Murugesan Balamurugan ◽  
Jyisy Yang
Keyword(s):  
Silver Nanoparticles ◽  
Raman Scattering ◽  
High Efficiency ◽  
Three Dimensional ◽  
Surface Enhanced Raman Scattering ◽  
Simple Method ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

In this work, a simple method via decoration of silver nanoparticles (AgNPs) on electrospun polycarbonate nanofibers (PCNFs) was proposed to prepare highly sensitive three-dimensional (3D) substrates for surface-enhanced Raman scattering (SERS) measurements. The method proposed in this work gave a high sensitive Ag@PCNFs substrate, which resulted from a successful production of high surface area of PCNFs with a high efficiency in the decoration of AgNPs. To produce PCNFs suitable for SERS application, parameters in fabrication of PCNFs were systematically examined and correlated with their corresponding scanning electron microscope (SEM) images. Examined parameters included the concentration of PC solution, the solvent to form PC solution, the applied voltage, and the rotating speed of a drum collector. Using the optimized condition, the bead-free PCNFs with a diameter in the range of 200–400 nm were successfully produced. To increase the efficiency in decoration of AgNPs, the surface properties of PNCFs were altered with an organic solvent, which was selected experimentally with guidance of Hildebrand solubility parameter. Results indicated that methanol was the most suitable solvent to effectively decorate AgNPs on PCNFs. By probing with para-hydroxythiophenol (pHTP), prepared SERS substrates of Ag@PCNFs provided an enhancement factor to the order of 7, which is at least an order of magnitude larger than the reported values in the literature for SERS substrates prepared with the electrospinning technique.

Fabrication of copper substrates for surface-enhanced Raman scattering using the microscratching method

2016 ◽  
Vol 232 (7) ◽  
pp. 1310-1315 ◽  
Author(s):  
Jingran Zhang ◽  
Yongda Yan ◽  
Zhenjiang Hu ◽  
Xuesen Zhao
Keyword(s):  
Raman Scattering ◽  
High Efficiency ◽  
Normal Load ◽  
High Surface ◽  
Surface Enhanced Raman Scattering ◽  
Crystallographic Plane ◽  
Nano Structures ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

The method of a tip-based microscratching is used to fabricate micro/nano structures on single crystal copper (110) and (111) planes under room temperature. The surface-enhanced Raman scattering enhancement performance of the structured Cu surface has been studied by rhodamine 6G probe molecules. Such micro/nano structures can be machined by varying the scratching parameters such as the feed and the normal load. Experimental results show that the high surface-enhanced Raman scattering enhancement is attributed to the nanostructures formed by pile-ups between adjacent grooves and nanocracks at the bottom of the microsquare. In addition, the Raman intensity of the crystallographic plane (110) is stronger than that of the crystallographic plane (111). This work verifies that the microscratching method is a feasible way to machine active surface-enhanced Raman scattering substrates on Cu surfaces with low cost and high efficiency.

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