Fabrication and near-field visualization of a wafer-scale dense plasmonic nanostructured array

Jungheum Yun, Haemi Lee, Chaewon Mun, Junghoon Jahng, William A. Morrison, Derek B. Nowak, Jung Hwan Song, Dong-Kwon Lim, Tae Sung Bae, Hyung Min Kim, Nam Hoon Kim, Sang Hwan Nam, Jongwoo Kim, Min Kyo Seo, Dong Ho Kim, Sung Gyu Park, Yung Doug Suh

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Developing a sensor that identifies and quantifies trace amounts of analyte molecules is crucially important for widespread applications, especially in the areas of chemical and biological detection. By non-invasively identifying the vibrational signatures of the target molecules, surface-enhanced Raman scattering (SERS) has been widely employed as a tool for molecular detection. Here, we report on the reproducible fabrication of wafer-scale dense SERS arrays and single-nanogap level near-field imaging of these dense arrays under ambient conditions. Plasmonic nanogaps densely populated the spaces among globular Ag nanoparticles with an areal density of 120 particles per μm 2 upon application of a nanolithography-free simple process consisting of the Ar plasma treatment of a polyethylene terephthalate substrate and subsequent Ag sputter deposition. The compact nanogaps produced a high SERS enhancement factor of 3.3 × 10 7 and homogeneous (coefficient of variation of 8.1%) SERS response. The local near fields at these nanogaps were visualized using photo-induced force microscopy that simultaneously enabled near-field excitation and near-field force detection under ambient conditions. A high spatial resolution of 3.1 nm was achieved. Taken together, the generation of a large-area SERS array with dense plasmonic nanogaps and the subsequent single-nanogap level characterization of the local near field have profound implications in the nanoplasmonic imaging and sensing applications.

Original languageEnglish
Pages (from-to)6444-6451
Number of pages8
JournalRSC Advances
Volume8
Issue number12
DOIs
Publication statusPublished - 2018 Jan 1

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Raman scattering
Visualization
Fabrication
Nanolithography
Imaging techniques
Sputter deposition
Molecules
Polyethylene Terephthalates
Polyethylene terephthalates
Microscopic examination
Nanoparticles
Plasmas
Sensors
Substrates

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Yun, J., Lee, H., Mun, C., Jahng, J., Morrison, W. A., Nowak, D. B., ... Suh, Y. D. (2018). Fabrication and near-field visualization of a wafer-scale dense plasmonic nanostructured array. RSC Advances, 8(12), 6444-6451. https://doi.org/10.1039/c7ra13322g

Fabrication and near-field visualization of a wafer-scale dense plasmonic nanostructured array. / Yun, Jungheum; Lee, Haemi; Mun, Chaewon; Jahng, Junghoon; Morrison, William A.; Nowak, Derek B.; Song, Jung Hwan; Lim, Dong-Kwon; Bae, Tae Sung; Kim, Hyung Min; Kim, Nam Hoon; Nam, Sang Hwan; Kim, Jongwoo; Seo, Min Kyo; Kim, Dong Ho; Park, Sung Gyu; Suh, Yung Doug.

In: RSC Advances, Vol. 8, No. 12, 01.01.2018, p. 6444-6451.

Research output: Contribution to journalArticle

Yun, J, Lee, H, Mun, C, Jahng, J, Morrison, WA, Nowak, DB, Song, JH, Lim, D-K, Bae, TS, Kim, HM, Kim, NH, Nam, SH, Kim, J, Seo, MK, Kim, DH, Park, SG & Suh, YD 2018, 'Fabrication and near-field visualization of a wafer-scale dense plasmonic nanostructured array', RSC Advances, vol. 8, no. 12, pp. 6444-6451. https://doi.org/10.1039/c7ra13322g
Yun, Jungheum ; Lee, Haemi ; Mun, Chaewon ; Jahng, Junghoon ; Morrison, William A. ; Nowak, Derek B. ; Song, Jung Hwan ; Lim, Dong-Kwon ; Bae, Tae Sung ; Kim, Hyung Min ; Kim, Nam Hoon ; Nam, Sang Hwan ; Kim, Jongwoo ; Seo, Min Kyo ; Kim, Dong Ho ; Park, Sung Gyu ; Suh, Yung Doug. / Fabrication and near-field visualization of a wafer-scale dense plasmonic nanostructured array. In: RSC Advances. 2018 ; Vol. 8, No. 12. pp. 6444-6451.
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