Effect of Pore Size and Film Thickness on Gold-Coated Nanoporous Anodic Aluminum Oxide Substrates for Surface-Enhanced Raman Scattering Sensor
A sensitive surface enhanced Raman scattering chemical sensor is demonstrated by using inexpensive gold-coated nanoporous anodic aluminum oxide substrates. To optimize the performance of the substrates for sensing by the Surface-enhanced Raman scattering (SERS) technique, the size of the nanopores i...
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| Format: | Article |
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MDPI AG
2015-11-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/15/12/29778 |
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| author | Aschalew Kassu Carlton Farley Anup Sharma Wonkyu Kim Junpeng Guo |
| author_facet | Aschalew Kassu Carlton Farley Anup Sharma Wonkyu Kim Junpeng Guo |
| author_sort | Aschalew Kassu |
| collection | DOAJ |
| description | A sensitive surface enhanced Raman scattering chemical sensor is demonstrated by using inexpensive gold-coated nanoporous anodic aluminum oxide substrates. To optimize the performance of the substrates for sensing by the Surface-enhanced Raman scattering (SERS) technique, the size of the nanopores is varied from 18 nm to 150 nm and the gold film thickness is varied from 30 nm to 120 nm. The sensitivity of gold-coated nanoporous surface enhanced Raman scattering sensor is characterized by detecting low concentrations of Rhodamine 6G laser dye molecules. The morphology of the SERS substrates is characterized by atomic force microscopy. Optical properties of the nanoporous SERS substrates including transmittance, reflectance, and absorbance are also investigated. Relative signal enhancement is plotted for a range of substrate parameters and a detection limit of 10−6 M is established. |
| first_indexed | 2024-04-11T20:46:28Z |
| format | Article |
| id | doaj.art-8a330e83d1c941d68f24c8f42746620b |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T20:46:28Z |
| publishDate | 2015-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-8a330e83d1c941d68f24c8f42746620b2022-12-22T04:04:00ZengMDPI AGSensors1424-82202015-11-011512299242993710.3390/s151229778s151229778Effect of Pore Size and Film Thickness on Gold-Coated Nanoporous Anodic Aluminum Oxide Substrates for Surface-Enhanced Raman Scattering SensorAschalew Kassu0Carlton Farley1Anup Sharma2Wonkyu Kim3Junpeng Guo4Department of Engineering, Construction Management & Ind. Tech., Alabama A & M University, 4900 Meridian Street, Normal, AL 35762, USADepartment of Physics, Chemistry and Mathematics, Alabama A & M University, 4900 Meridian Street, Normal, AL 35762, USADepartment of Physics, Chemistry and Mathematics, Alabama A & M University, 4900 Meridian Street, Normal, AL 35762, USADepartment of Electrical and Computer Engineering, University of Alabama in Huntsville, 301 Sparkman Dr., Huntsville, AL 35899, USADepartment of Electrical and Computer Engineering, University of Alabama in Huntsville, 301 Sparkman Dr., Huntsville, AL 35899, USAA sensitive surface enhanced Raman scattering chemical sensor is demonstrated by using inexpensive gold-coated nanoporous anodic aluminum oxide substrates. To optimize the performance of the substrates for sensing by the Surface-enhanced Raman scattering (SERS) technique, the size of the nanopores is varied from 18 nm to 150 nm and the gold film thickness is varied from 30 nm to 120 nm. The sensitivity of gold-coated nanoporous surface enhanced Raman scattering sensor is characterized by detecting low concentrations of Rhodamine 6G laser dye molecules. The morphology of the SERS substrates is characterized by atomic force microscopy. Optical properties of the nanoporous SERS substrates including transmittance, reflectance, and absorbance are also investigated. Relative signal enhancement is plotted for a range of substrate parameters and a detection limit of 10−6 M is established.http://www.mdpi.com/1424-8220/15/12/29778surface enhanced Raman scatteringsensingnanoporous substratesanodic aluminum oxidechemical sensoroptical sensorceramic membranes |
| spellingShingle | Aschalew Kassu Carlton Farley Anup Sharma Wonkyu Kim Junpeng Guo Effect of Pore Size and Film Thickness on Gold-Coated Nanoporous Anodic Aluminum Oxide Substrates for Surface-Enhanced Raman Scattering Sensor Sensors surface enhanced Raman scattering sensing nanoporous substrates anodic aluminum oxide chemical sensor optical sensor ceramic membranes |
| title | Effect of Pore Size and Film Thickness on Gold-Coated Nanoporous Anodic Aluminum Oxide Substrates for Surface-Enhanced Raman Scattering Sensor |
| title_full | Effect of Pore Size and Film Thickness on Gold-Coated Nanoporous Anodic Aluminum Oxide Substrates for Surface-Enhanced Raman Scattering Sensor |
| title_fullStr | Effect of Pore Size and Film Thickness on Gold-Coated Nanoporous Anodic Aluminum Oxide Substrates for Surface-Enhanced Raman Scattering Sensor |
| title_full_unstemmed | Effect of Pore Size and Film Thickness on Gold-Coated Nanoporous Anodic Aluminum Oxide Substrates for Surface-Enhanced Raman Scattering Sensor |
| title_short | Effect of Pore Size and Film Thickness on Gold-Coated Nanoporous Anodic Aluminum Oxide Substrates for Surface-Enhanced Raman Scattering Sensor |
| title_sort | effect of pore size and film thickness on gold coated nanoporous anodic aluminum oxide substrates for surface enhanced raman scattering sensor |
| topic | surface enhanced Raman scattering sensing nanoporous substrates anodic aluminum oxide chemical sensor optical sensor ceramic membranes |
| url | http://www.mdpi.com/1424-8220/15/12/29778 |
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