Near‐Field Optical Tweezers for Chemistry and Biology

Abstract

Near‐field optical tweezer techniques have been essential for the development for manipulation and identification of micro‐ and nanoparticles (NPs) in lab‐on‐a‐chip systems. Optical waveguide, which has been exploited as a fascinating manipulation approach, provides valuable insights into the biology of the specific type of cells and potential for enhanced Raman spectroscopy. Specific waveguides and its own structures in near‐field optical techniques can be used to trap, transport, sort, levitate, and deform a micro‐ or NP in colloid chemistry and pharmaceutical biology. Given the precise manipulation and trapping stiffness with low light power, a diverse range of micro/nanostructured optical fiber, silicon‐on‐insulator resonator, photonic crystal cavity, and plasmonic waveguide have been proposed in many theoretical models and experimental observations, including polystyrene bead, silica bead, metal particle, erythrocyte, virus, and DNA. Considering the optical pressure fundamental, fabrication process, and structure categorization, this review describes recent mainstream developments and future perspectives of near‐field optical tweezers for chemical and biological applications.

60 Years of physica status solidi

“…The articles raising the most attention in the form of citations within the year of appearance 2020 are listed below. [1][2][3][4][5][6] Looking to the future, projects in the pipeline for 2021 include Let us conclude this year's Editorial with our take on the global health crisis: We recognize that the COVID-19 pandemic is affecting everyone's daily lives and the research community in unprecedented ways. Although some research activities are slowly resuming, many institutions remain closed, with researchers working from home under unusual circumstances.…”

60 Years of physica status solidi

“…The articles raising the most attention in the form of citations within the year of appearance 2020 are listed below. [1][2][3][4][5][6] Looking to the future, projects in the pipeline for 2021 include Radiation and Emission in Materials in pss (a)'s first issue, and soon after, Compound Semiconductors, while pss (b) proudly presents Topological Insulators: Materials -Fundamental Properties -Devices in collaboration with DFG-funded priority program 1666. In pss (RRL), look out for Hybrid Photovoltaics and Semiconductors and Emerging Fluorite-and Wurtzite-Type Ferroelectrics: From (Hf,Zr)O 2 to AlN and Related Materials.…”

Genetic Material Manipulation and Modification by Optical Trapping and Nanosurgery-A Perspective

“…Optical trapping becomes less robust when approaching target sizes below 100-200 nm (Bradac, 2018). Plasmonics can help with this issue as the phenomenon greatly amplifies electric fields (from the OT, for example) precisely at the < 100 nm scale (Boulais et al, 2013;Hu et al, 2020). This can enhance trapping forces and nanoablation at the nanometric scale, while still employing optical excitation (Csaki et al, 2007;Boulais et al, 2013).…”