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Hill RT, Kozek KM, Hucknall A, et al. Nanoparticle-Film Plasmon Ruler Interrogated with Transmission Visible Spectroscopy. ACS Photonics. 2014;1(10):974-984doi: 10.1021/ph500190q.
Hill, R. T., Kozek, K. M., Hucknall, A., Smith, D. R., & Chilkoti, A. (2014). Nanoparticle-Film Plasmon Ruler Interrogated with Transmission Visible Spectroscopy. ACS photonics, 1(10), 974-984. https://doi.org/10.1021/ph500190q
Hill, Ryan T, et al. "Nanoparticle-Film Plasmon Ruler Interrogated with Transmission Visible Spectroscopy." ACS photonics vol. 1,10 (2014): 974-984. doi: https://doi.org/10.1021/ph500190q
Hill RT, Kozek KM, Hucknall A, Smith DR, Chilkoti A. Nanoparticle-Film Plasmon Ruler Interrogated with Transmission Visible Spectroscopy. ACS Photonics. 2014 Oct 15;1(10):974-984. doi: 10.1021/ph500190q. Epub 2014 Sep 11. PMID: 25541618; PMCID: PMC4270419.
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ACS Photonics. 2014 Oct 15;1(10):974-984. doi: 10.1021/ph500190q. Epub 2014 Sep 11.

Nanoparticle-Film Plasmon Ruler Interrogated with Transmission Visible Spectroscopy.

ACS photonics

Ryan T Hill, Klaudia M Kozek, Angus Hucknall, David R Smith, Ashutosh Chilkoti

Affiliations

  1. Department of Biomedical Engineering, Department of Electrical and Computer Engineering, Center for Metamaterials and Integrated Plasmonics, and Center for Biologically Inspired Materials and Material Systems, Duke University , Durham, North Carolina 27708, United States.

PMID: 25541618 PMCID: PMC4270419 DOI: 10.1021/ph500190q

Abstract

The widespread use of plasmonic nanorulers (PNRs) in sensing platforms has been plagued by technical challenges associated with the development of methods to fabricate precisely controlled nanostructures with high yield and characterize them with high throughput. We have previously shown that creating PNRs in a nanoparticle-film (NP-film) format enables the fabrication of an extremely large population of uniform PNRs with 100% yield using a self-assembly approach, which facilitates high-throughput PNR characterization using ensemble spectroscopic measurements and eliminates the need for expensive microscopy systems required by many other PNR platforms. We expand upon this prior work herein, showing that the NP-film PNR can be made compatible with aqueous sensing studies by adapting it for use in a transmission localized surface plasmon resonance spectroscopy format, where the coupled NP-film resonance responsible for the PNR signal is directly probed using an extinction measurement from a standard spectrophotometer. We designed slide holders that fit inside standard spectrophotometer cuvettes and position NP-film samples so that the coupled NP-film resonance can be detected in a collinear optical configuration. Once the NP-film PNR samples are cuvette-compatible, it is straightforward to calibrate the PNR in aqueous solution and use it to characterize dynamic, angstrom-scale distance changes resulting from pH-induced swelling of polyelectrolyte (PE) spacer layers as thin as 1 PE layer and also of a self-assembled monolayer of an amine-terminated alkanethiol. This development is an important step toward making PNR sensors more user-friendly and encouraging their widespread use in various sensing schemes.

Keywords: 3D printing; localized surface plasmon resonance; plasmon coupling; plasmon ruler; plasmonics; sensor

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