Surface-enhanced Raman spectra of melamine and other chemicals using a 1550nm (retina-safe) laser
Many trace chemical analyses are being transitioned from the lab to the field, among which is surface-enhanced Raman spectroscopy. Although initial portable Raman analyzers primarily employ 785nm laser excitation, recent studies suggest longer wavelengths, with an appropriate surface-enhanced Raman-...
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| Veröffentlicht in: | Journal of Raman spectroscopy 2012-06, Vol.43 (6), p.701-705 |
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| container_issue | 6 |
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| container_title | Journal of Raman spectroscopy |
| container_volume | 43 |
| creator | Huang, Hermes Shende, Chetan Sengupta, Atanu Inscore, Frank Brouillette, Carl Smith, Wayne Farquharson, Stuart |
| description | Many trace chemical analyses are being transitioned from the lab to the field, among which is surface-enhanced Raman spectroscopy. Although initial portable Raman analyzers primarily employ 785nm laser excitation, recent studies suggest longer wavelengths, with an appropriate surface-enhanced Raman-active substrate, may provide equal sensitivity. Furthermore, 1550nm excitation may provide added safety for the user, in that permanent retina damage does not occur. Here, we show that a reasonable enhancement factor can be obtained for melamine using 1550nm laser excitation that is nearly equivalent to those obtained using 785 and 1064nm laser excitation. We also demonstrate that a number of other chemicals of interest can be measured by 1550nm surface-enhanced Raman scattering, albeit only modest sensitivity is achieved because of instrument limitations, not enhancement factors. Copyright © 2011 John Wiley & Sons, Ltd. [PUBLICATION ABSTRACT] |
| doi_str_mv | 10.1002/jrs.3079 |
| format | Article |
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Although initial portable Raman analyzers primarily employ 785nm laser excitation, recent studies suggest longer wavelengths, with an appropriate surface-enhanced Raman-active substrate, may provide equal sensitivity. Furthermore, 1550nm excitation may provide added safety for the user, in that permanent retina damage does not occur. Here, we show that a reasonable enhancement factor can be obtained for melamine using 1550nm laser excitation that is nearly equivalent to those obtained using 785 and 1064nm laser excitation. We also demonstrate that a number of other chemicals of interest can be measured by 1550nm surface-enhanced Raman scattering, albeit only modest sensitivity is achieved because of instrument limitations, not enhancement factors. Copyright © 2011 John Wiley & Sons, Ltd. 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Although initial portable Raman analyzers primarily employ 785nm laser excitation, recent studies suggest longer wavelengths, with an appropriate surface-enhanced Raman-active substrate, may provide equal sensitivity. Furthermore, 1550nm excitation may provide added safety for the user, in that permanent retina damage does not occur. Here, we show that a reasonable enhancement factor can be obtained for melamine using 1550nm laser excitation that is nearly equivalent to those obtained using 785 and 1064nm laser excitation. We also demonstrate that a number of other chemicals of interest can be measured by 1550nm surface-enhanced Raman scattering, albeit only modest sensitivity is achieved because of instrument limitations, not enhancement factors. Copyright © 2011 John Wiley & Sons, Ltd. [PUBLICATION ABSTRACT]</description><subject>Equivalence</subject><subject>Excitation</subject><subject>Lasers</subject><subject>Melamine</subject><subject>Raman scattering</subject><subject>Raman spectra</subject><subject>Raman spectroscopy</subject><subject>Spectra</subject><issn>0377-0486</issn><issn>1097-4555</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNpdzktLw0AUhuFBFKxV8CcMuKmL1HMyt2QpxRsUBC_rcjo5Y1OSSZ1J_r8FXbn6Ng8frxDXCEsEKO_2KS8VuPpEzBBqV2hjzKmYgXKuAF3Zc3GR8x4A6triTND7lAJ5LjjuKHpu5Bv1FGU-sB8TySHInjvq28iSYiOHccdJ-h33racuyym38UuSRGMg9nKReGwjFZkC38qOMqdLcRaOkq_-di4-Hx8-Vs_F-vXpZXW_Lg6ocCzQgqko1M5a52CLpSJjWPvGNFsbykorriCgUVBWtgFs6tKSJyAIBtCjmovF7-8hDd8T53HTt9lz11HkYcobNBq1BazKI735R_fDlOKx7qjQaVBaVeoH7ylhlg</recordid><startdate>20120601</startdate><enddate>20120601</enddate><creator>Huang, Hermes</creator><creator>Shende, Chetan</creator><creator>Sengupta, Atanu</creator><creator>Inscore, Frank</creator><creator>Brouillette, Carl</creator><creator>Smith, Wayne</creator><creator>Farquharson, Stuart</creator><general>Wiley Subscription Services, Inc</general><scope>7QF</scope><scope>7QO</scope><scope>7QQ</scope><scope>7SC</scope><scope>7SE</scope><scope>7SP</scope><scope>7SR</scope><scope>7TA</scope><scope>7TB</scope><scope>7U5</scope><scope>7U9</scope><scope>8BQ</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>H8D</scope><scope>H8G</scope><scope>H94</scope><scope>JG9</scope><scope>JQ2</scope><scope>KR7</scope><scope>L7M</scope><scope>L~C</scope><scope>L~D</scope><scope>P64</scope><scope>RC3</scope></search><sort><creationdate>20120601</creationdate><title>Surface-enhanced Raman spectra of melamine and other chemicals using a 1550nm (retina-safe) laser</title><author>Huang, Hermes ; 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| ispartof | Journal of Raman spectroscopy, 2012-06, Vol.43 (6), p.701-705 |
| issn | 0377-0486 1097-4555 |
| language | eng |
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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | Equivalence Excitation Lasers Melamine Raman scattering Raman spectra Raman spectroscopy Spectra |
| title | Surface-enhanced Raman spectra of melamine and other chemicals using a 1550nm (retina-safe) laser |
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