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Title: Nanophotonic force microscopy: Characterizing particle–surface interactions using near-field photonics

Abstract

Direct measurements of particle–surface interactions are important for characterizing the stability and behavior of colloidal and nanoparticle suspensions. Current techniques are limited in their ability to measure pico-Newton scale interaction forces on submicrometer particles due to signal detection limits and thermal noise. In this paper, we present a new technique for making measurements in this regime, which we refer to as nanophotonic force microscopy. Using a photonic crystal resonator, we generate a strongly localized region of exponentially decaying, near-field light that allows us to confine small particles close to a surface. From the statistical distribution of the light intensity scattered by the particle we are able to map out the potential well of the trap and directly quantify the repulsive force between the nanoparticle and the surface. Finally, as shown in this Letter, our technique is not limited by thermal noise, and therefore, we are able to resolve interaction forces smaller than 1 pN on dielectric particles as small as 100 nm in diameter.

Authors:
 [1];  [1];  [1];  [1]
  1. Cornell Univ., Ithaca, NY (United States)
Publication Date:
Research Org.:
Cornell Univ., Ithaca, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1346920
Grant/Contract Number:
SC0003935
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nano Letters
Additional Journal Information:
Journal Volume: 15; Journal Issue: 2; Journal ID: ISSN 1530-6984
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; colloidal stability; force measurement; nanoparticle characterization; optical tweezers; photonic crystals; surface interactions

Citation Formats

Schein, Perry, Kang, Pilgyu, O’Dell, Dakota, and Erickson, David. Nanophotonic force microscopy: Characterizing particle–surface interactions using near-field photonics. United States: N. p., 2015. Web. doi:10.1021/nl504840b.
Schein, Perry, Kang, Pilgyu, O’Dell, Dakota, & Erickson, David. Nanophotonic force microscopy: Characterizing particle–surface interactions using near-field photonics. United States. doi:10.1021/nl504840b.
Schein, Perry, Kang, Pilgyu, O’Dell, Dakota, and Erickson, David. Tue . "Nanophotonic force microscopy: Characterizing particle–surface interactions using near-field photonics". United States. doi:10.1021/nl504840b. https://www.osti.gov/servlets/purl/1346920.
@article{osti_1346920,
title = {Nanophotonic force microscopy: Characterizing particle–surface interactions using near-field photonics},
author = {Schein, Perry and Kang, Pilgyu and O’Dell, Dakota and Erickson, David},
abstractNote = {Direct measurements of particle–surface interactions are important for characterizing the stability and behavior of colloidal and nanoparticle suspensions. Current techniques are limited in their ability to measure pico-Newton scale interaction forces on submicrometer particles due to signal detection limits and thermal noise. In this paper, we present a new technique for making measurements in this regime, which we refer to as nanophotonic force microscopy. Using a photonic crystal resonator, we generate a strongly localized region of exponentially decaying, near-field light that allows us to confine small particles close to a surface. From the statistical distribution of the light intensity scattered by the particle we are able to map out the potential well of the trap and directly quantify the repulsive force between the nanoparticle and the surface. Finally, as shown in this Letter, our technique is not limited by thermal noise, and therefore, we are able to resolve interaction forces smaller than 1 pN on dielectric particles as small as 100 nm in diameter.},
doi = {10.1021/nl504840b},
journal = {Nano Letters},
number = 2,
volume = 15,
place = {United States},
year = {Tue Jan 27 00:00:00 EST 2015},
month = {Tue Jan 27 00:00:00 EST 2015}
}

Journal Article:
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