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Papers by bongsoo kim
SiO2ACHTUNGTRENUNG(300 nm)/Si substrate was investigated by depositing Au nanoparticles using thermal evaporation. This provideda maximum enhancement of 120
times for single-layer graphene at 633 nm excitation. SERS spectra andscan images of single-layer and fewlayer graphene were acquired. Singlelayer graphene provides much larger SERS enhancement compared to fewlayergraphene, while in single-layer graphene the enhancement of the G
band was larger than that of the 2D band. Furthermore, the D bands were identified in the SERS spectra; these bands were not observed in a normal Raman spectrum without Au deposition. Appearance of the D band is ascribed to the considerable SERS enhancement and not to an Au deposition- induced defect. Lastly, SERS enhancement of graphene on a transparent glass substrate was compared with
that on the SiO2ACHTUNGTRENUNG(300 nm)/Si substrate to exclude enhancement by multiple reflections between the Si substrate and deposited Au nanoparticles. The contribution of multiple reflections to total enhancement on the SiO2- ACHTUNGTRENUNG(300 nm)/Si substrate was 1.6 times outof average SERS enhancement factor, 71 times.
over a considerable amount of time and reusable after simple treatment. Since this SNOF sensor is composed of
a single Au NW on a film, development of a multiplex sensor would be possible by employing NWs modified by multiple
kinds of aptamers.
SiO2ACHTUNGTRENUNG(300 nm)/Si substrate was investigated by depositing Au nanoparticles using thermal evaporation. This provideda maximum enhancement of 120
times for single-layer graphene at 633 nm excitation. SERS spectra andscan images of single-layer and fewlayer graphene were acquired. Singlelayer graphene provides much larger SERS enhancement compared to fewlayergraphene, while in single-layer graphene the enhancement of the G
band was larger than that of the 2D band. Furthermore, the D bands were identified in the SERS spectra; these bands were not observed in a normal Raman spectrum without Au deposition. Appearance of the D band is ascribed to the considerable SERS enhancement and not to an Au deposition- induced defect. Lastly, SERS enhancement of graphene on a transparent glass substrate was compared with
that on the SiO2ACHTUNGTRENUNG(300 nm)/Si substrate to exclude enhancement by multiple reflections between the Si substrate and deposited Au nanoparticles. The contribution of multiple reflections to total enhancement on the SiO2- ACHTUNGTRENUNG(300 nm)/Si substrate was 1.6 times outof average SERS enhancement factor, 71 times.
over a considerable amount of time and reusable after simple treatment. Since this SNOF sensor is composed of
a single Au NW on a film, development of a multiplex sensor would be possible by employing NWs modified by multiple
kinds of aptamers.