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

Journal Article · · Nano Letters
DOI:https://doi.org/10.1021/nl504840b· OSTI ID:1346920

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.

Research Organization:
Cornell Univ., Ithaca, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0003935
OSTI ID:
1346920
Journal Information:
Nano Letters, Vol. 15, Issue 2; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

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High-Yield Synthesis of Au@Ag Right Bipyramids and Self-Assembly into Four-Leaf-Clover-like Structures journal June 2017
Simultaneous Characterization of Nanoparticle Size and Particle-Surface Interactions with Three-Dimensional Nanophotonic Force Microscopy journal September 2016
Trajectories, diffusion, and interactions of single ceria particles on a glass surface observed by evanescent wave microscopy journal January 2020
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Nanophotonic trapping: precise manipulation and measurement of biomolecular arrays: Nanophotonic trapping
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journal April 2017
Optical levitation and feedback cooling of a nanoparticle at subwavelength distances from a membrane text January 2018
Single-Dimer Formation Rate Reveals Heterogeneous Particle Surface Reactivity journal October 2019