Plasmonic Nanotweezers and Nanosensors for Point-of-Care Applications.

Adv Opt Mater

Materials Science & Engineering Program and Texas Materials Institute, The University of Texas at Austin, Austin, TX 78712, USA.

Published: July 2021

AI Article Synopsis

  • The ability to manipulate and analyze biological components like cells, DNAs, and proteins at high resolution is crucial for understanding biology and enabling early disease diagnosis.
  • Progress in plasmonic nanotweezers and nanosensors leverages plasmon-enhanced light-matter interactions for better optical manipulation and analysis at the nanoscale.
  • The combination of these technologies with microfluidics in plasmofluidics opens new possibilities for point-of-care (POC) applications, though challenges remain in their development and implementation.

Article Abstract

The capabilities of manipulating and analyzing biological cells, bacteria, viruses, DNAs, and proteins at high resolution are significant in understanding biology and enabling early disease diagnosis. We discuss progress in developments and applications of plasmonic nanotweezers and nanosensors where the plasmon-enhanced light-matter interactions at the nanoscale improve the optical manipulation and analysis of biological objects. Selected examples are presented to illustrate their design and working principles. In the context of plasmofluidics, which merges plasmonics and fluidics, the integration of plasmonic nanotweezers and nanosensors with microfluidic systems for point-of-care (POC) applications is envisioned. We provide our perspectives on the challenges and opportunities in further developing and applying the plasmofluidic POC devices.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8382230PMC
http://dx.doi.org/10.1002/adom.202100050DOI Listing

Publication Analysis

Top Keywords

plasmonic nanotweezers
12
nanotweezers nanosensors
12
nanosensors point-of-care
4
point-of-care applications
4
applications capabilities
4
capabilities manipulating
4
manipulating analyzing
4
analyzing biological
4
biological cells
4
cells bacteria
4

Similar Publications

Recent Advancements in Nanophotonics for Optofluidics.

Adv Phys X

October 2024

Department of Electrical and Computer Engineering, Vanderbilt University, Nashville, Tennessee 37235, USA.

Optofluidics is dedicated to achieving integrated control of particle and fluid motion, particularly on the micrometer scale, by utilizing light to direct fluid flow and particle motion. The field has seen significant growth recently, driven by the concerted efforts of researchers across various scientific disciplines, notably for its successful applications in biomedical science. In this review, we explore a range of optofluidic architectures developed over the past decade, with a primary focus on mechanisms for precise control of micro and nanoscale biological objects and their applications in sensing.

View Article and Find Full Text PDF
Article Synopsis
  • Micro and nano-scale manipulation of living matter is important for diagnosing diseases, drug development, and identifying biomarkers, but trapping biological nanoparticles has been challenging.* -
  • The study introduces a new inverted hybrid dielectric-plasmonic nanobowtie that addresses issues of high cost and complex manufacturing in current systems while allowing for stable trapping of biological samples with minimal damage.* -
  • Numerical simulations show this innovative design can trap 100 nm viruses with a strong optical force and improved energy confinement, while preserving the biological sample's integrity.*
View Article and Find Full Text PDF

This paper showcases an experimental demonstration of near-field optical trapping and dynamic manipulation of an individual extracellular vesicle. This is accomplished through the utilization of a plasmonic dielectric nanoantenna designed to support an optical anapole state-a non-radiating optical state resulting from the destructive interference between electric and toroidal dipoles in the far-field, leading to robust near-field enhancement. To further enhance the field intensity associated with the optical anapole state, a plasmonic mirror is incorporated, thereby boosting trapping capabilities.

View Article and Find Full Text PDF

Mirror-Enhanced Plasmonic Nanoaperture for Ultrahigh Optical Force Generation with Minimal Heat Generation.

Nano Lett

December 2023

Department of Electrical and Computer Engineering, Vanderbilt University, Nashville, Tennessee 37235, United States.

Article Synopsis
  • Researchers introduced an innovative Double Nanohole Plasmonic Tweezers (DNH) design with a reflector layer to allow on-resonance illumination, minimizing heating effects while enhancing optical forces.
  • This new design effectively dissipates heat and redistributes electromagnetic hotspots, improving accessibility for trapping nanoscale particles.
  • The study showcases low-power trapping of small extracellular vesicles, paving the way for advancements in applications like Surface Enhanced Raman Spectroscopy (SERS) and enhanced imaging techniques that require strong light-matter interactions.
View Article and Find Full Text PDF

This paper introduces an ultracompact lab-on-a-chip device with a size of [Formula: see text] for surface-enhanced coherent anti-Stokes Raman scattering. This device comprises of a unique hybrid plasmonic-photonic vertical coupler, for light-coupling between the device and a light source, and a heptamer plasmonic nanotweezer for trapping and manipulation of nanoparticles. The coupler with its nanoscale size of [Formula: see text] offers maximum coupling efficiency and directivity of -4.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!