Bio-molecular applications of recent developments in optical tweezers

D Choudhary, A Mossa, M Jadhav, C Cecconi - Biomolecules, 2019 - mdpi.com
In the past three decades, the ability to optically manipulate biomolecules has spurred a new
era of medical and biophysical research. Optical tweezers (OT) have enabled experimenters …

[HTML][HTML] A review of single-cell microrobots: classification, driving methods and applications

Y Wang, J Chen, G Su, J Mei, J Li - Micromachines, 2023 - mdpi.com
Single-cell microrobots are new microartificial devices that use a combination of single cells
and artificial devices, with the advantages of small size, easy degradation and ease of …

Optical trap** of nanoparticles by ultrashort laser pulses

A Usman, WY Chiang, H Masuhara - Science progress, 2013 - journals.sagepub.com
Optical trap** with continuous-wave lasers has been a fascinating field in the optical
manipulation. It has become a powerful tool for manipulating micrometer-sized objects, and …

Femtosecond pulse-width dependent trap** and directional ejection dynamics of dielectric nanoparticles

WY Chiang, A Usman, H Masuhara - The Journal of Physical …, 2013 - ACS Publications
We demonstrate that laser pulse duration, which determines its impulsive peak power, is an
effective parameter to control the number of optically trapped dielectric nanoparticles, their …

Forces due to pulsed beams in optical tweezers: linear effects

N Preez-Wilkinson, AB Stilgoe, T Alzaidi… - Optics …, 2015 - opg.optica.org
We present a method for the precise calculation of optical forces due to a tightly-focused
pulsed laser beam using generalized Lorenz–Mie theory or the T-matrix method. This …

Precise Nanoparticle Manipulation Using Femtosecond Laser Trap**

KK Singh, D Kumar, A Singh… - The Journal of Physical …, 2024 - ACS Publications
Optical tweezers use strongly focused light for trap**, characterizing, and manipulating
objects in the microscopic and nanoscopic regimes. However, fully understanding optical …

Bidirectional polymorphic conversion by focused femtosecond laser irradiation

CS Wu, HY Yoshikawa… - Japanese Journal of …, 2020 - iopscience.iop.org
We present bidirectional polymorphic conversion of L-phenylalanine by focused
femtosecond laser irradiation. When the femtosecond laser beam is focused at an …

Picosecond motional relaxation of nanoparticles in femtosecond laser trap**

M Muramatsu, TF Shen, WY Chiang… - The Journal of …, 2016 - ACS Publications
Repetitive drag and release dynamics by impulsive force is characteristic of optical trap**
by femtosecond laser pulses. We studied the dynamics utilizing double pulse train and …

Comparative study of femtosecond and conventional optical tweezers

A Singh, KK Singh, D Kumar, D Goswami - Applied Physics B, 2025 - Springer
We present a comparative study of continuous-wave (CW) and pulsed optical tweezers for
trap** polystyrene beads with radii of 250 nm, 500 nm, and 1 μm, using five different laser …

Femtosecond laser trap** dynamics of nanoparticles: a single transient assembly formation leading to their directional ejection

WY Chiang, A Usman, T Sugiyama… - The Journal of …, 2017 - ACS Publications
We investigated femtosecond laser trap** dynamics of silica nanoparticles with different
hydrophobic surface properties. We demonstrated that the hydrophobic surface on the silica …