High Density Periodic Metal Nanopyramids for Surface Enhanced Raman Spectroscopy

Mingliang Jin

    Research output: ThesisPhD Thesis - Research UT, graduation UT

    59 Downloads (Pure)

    Abstract

    The work presented in this thesis is focused on two areas. First, a new type of nanotextured noble-metal surface has been developed. The new nanotextured surface is demonstrated to enhance inelastic (Raman) scattering, called surface enhanced Raman scattering (SERS), from molecules adsorbed on the metal surface due to large electromagnetic fields generated in nanoscale gaps by an external laser excitation source. By detecting the enhanced Raman scattered photons, the molecular bond information can be analyzed using methods from conventional Raman spectroscopy. Raman spectroscopy is very powerful analytical method in chemistry, biology and other scientific areas, since it provides molecular vibrational information, which is considered a fingerprint for a particular molecule. Raman spectroscopy is less commonly used compared to other analytical methods, such as infrared spectroscopy, due to its extremely weak signal. For example, a typical molecule excited with ~1 mW laser excitation will scatter ~10-6 photons s-1 molecule-1 1, which requires a large number of molecules
    Original languageEnglish
    Awarding Institution
    • University of Twente
    Supervisors/Advisors
    • van den Berg, Albert , Supervisor
    • Carlen, Edwin, Advisor
    Award date19 Jan 2012
    Place of PublicationZutphen
    Publisher
    Print ISBNs978-90-365-3322-5
    DOIs
    Publication statusPublished - 19 Jan 2012

    Fingerprint

    Raman spectroscopy
    Metals
    Molecules
    Raman scattering
    Inelastic scattering
    Laser excitation
    Precious metals
    Electromagnetic fields
    Infrared spectroscopy
    Photons
    Spectroscopy

    Keywords

    • METIS-290405
    • EWI-22749
    • IR-79373
    • MEMSLand project

    Cite this

    Jin, Mingliang. / High Density Periodic Metal Nanopyramids for Surface Enhanced Raman Spectroscopy. Zutphen : University of Twente, 2012. 147 p.
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    High Density Periodic Metal Nanopyramids for Surface Enhanced Raman Spectroscopy. / Jin, Mingliang.

    Zutphen : University of Twente, 2012. 147 p.

    Research output: ThesisPhD Thesis - Research UT, graduation UT

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    T1 - High Density Periodic Metal Nanopyramids for Surface Enhanced Raman Spectroscopy

    AU - Jin, Mingliang

    PY - 2012/1/19

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    AB - The work presented in this thesis is focused on two areas. First, a new type of nanotextured noble-metal surface has been developed. The new nanotextured surface is demonstrated to enhance inelastic (Raman) scattering, called surface enhanced Raman scattering (SERS), from molecules adsorbed on the metal surface due to large electromagnetic fields generated in nanoscale gaps by an external laser excitation source. By detecting the enhanced Raman scattered photons, the molecular bond information can be analyzed using methods from conventional Raman spectroscopy. Raman spectroscopy is very powerful analytical method in chemistry, biology and other scientific areas, since it provides molecular vibrational information, which is considered a fingerprint for a particular molecule. Raman spectroscopy is less commonly used compared to other analytical methods, such as infrared spectroscopy, due to its extremely weak signal. For example, a typical molecule excited with ~1 mW laser excitation will scatter ~10-6 photons s-1 molecule-1 1, which requires a large number of molecules

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