Abhay Kotnala
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View article: Microfluidic nano-plasmonic imaging platform for purification- and label-free single small extracellular vesicle characterization
Microfluidic nano-plasmonic imaging platform for purification- and label-free single small extracellular vesicle characterization Open
View article: Microfluidic Nano-Plasmonic Imaging Platform for Purification- and Label-Free Single Small Extracellular Vesicle Counting
Microfluidic Nano-Plasmonic Imaging Platform for Purification- and Label-Free Single Small Extracellular Vesicle Counting Open
Tumor-derived circulating small extracellular vesicles (sEVs) is a promising non-invasive biomarker for disease diagnosis. However, their quantitative detection remains challenging due to their small size and the complexity of blood plasma…
View article: Opto-hydrodynamic tweezers
Opto-hydrodynamic tweezers Open
The manuscript unveils a portable optofluidic device for precise trapping, manipulation, and sorting of single cells/particles using a single standard unmodified optical fiber in a microfluidic channel—a notable advance in optofluidic tech…
View article: Universal optothermal micro/nanoscale rotors
Universal optothermal micro/nanoscale rotors Open
Rotation of micro/nano-objects is important for micro/nanorobotics, three-dimensional imaging, and lab-on-a-chip systems. Optical rotation techniques are especially attractive because of their fuel-free and remote operation. However, curre…
View article: Plasmonic Nanotweezers and Nanosensors for Point‐of‐Care Applications (Advanced Optical Materials 13/2021)
Plasmonic Nanotweezers and Nanosensors for Point‐of‐Care Applications (Advanced Optical Materials 13/2021) Open
In article number 2100050, Yuebing Zheng and co-workers review the progress in developments and applications of plasmonic nanotweezers and nanosensors where the plasmon-enhanced light–matter interactions at the nanoscale improve the optica…
View article: Enhancing Single-Molecule Fluorescence Spectroscopy with Simple and Robust Hybrid Nanoapertures
Enhancing Single-Molecule Fluorescence Spectroscopy with Simple and Robust Hybrid Nanoapertures Open
Plasmonic nanoapertures have found exciting applications in optical sensing, spectroscopy, imaging, and nanomanipulation. The subdiffraction optical field localization, reduced detection volume (~attoliters), and background-free operation …
View article: Plasmonic Nanotweezers and Nanosensors for Point‐of‐Care Applications
Plasmonic Nanotweezers and Nanosensors for Point‐of‐Care Applications Open
The capabilities of manipulating and analyzing biological cells, bacteria, viruses, deoxyribonucleic acids (DNAs), and proteins at high resolution are significant in understanding biology and enabling early disease diagnosis. The progress …
View article: Universal Light-Driven Micro/Nanoscale Rotors
Universal Light-Driven Micro/Nanoscale Rotors Open
The capability of rotating micro/nanoscale particles and structures is important for micro/nanorobotics, three-dimensional particle imaging, and lab-on-a-chip systems. Light-driven rotors are especially attractive due to the fuel-free and …
View article: Opto-thermoelectric speckle tweezers
Opto-thermoelectric speckle tweezers Open
Opto-thermoelectric tweezers present a new paradigm for optical trapping and manipulation of particles using low-power and simple optics. New real-life applications of opto-thermoelectric tweezers in areas such as biophysics, microfluidics…
View article: Opto-thermoelectric pulling of light-absorbing particles
Opto-thermoelectric pulling of light-absorbing particles Open
View article: Overcoming Diffusion-Limited Trapping in Nanoaperture Tweezers Using Opto-Thermal-Induced Flow
Overcoming Diffusion-Limited Trapping in Nanoaperture Tweezers Using Opto-Thermal-Induced Flow Open
Nanoaperture-based plasmonic tweezers have shown tremendous potential in trapping, sensing, and spectroscopic analysis of nano-objects with single-molecule sensitivity. However, the trapping process is often diffusion-limited and therefore…
View article: Digital Assembly of Colloidal Particles for Nanoscale Manufacturing
Digital Assembly of Colloidal Particles for Nanoscale Manufacturing Open
From unravelling the most fundamental phenomena to enabling applications that impact our everyday lives, the nanoscale world holds great promise for science, technology, and medicine. However, the extent of its practical realization relies…
View article: Opto-thermophoretic fiber tweezers
Opto-thermophoretic fiber tweezers Open
Recent advances in opto-thermophoretic tweezers open new avenues for low-power trapping and manipulation of nanoparticles with potential applications in colloidal assembly, nanomanufacturing, life sciences, and nanomedicine. However, to fu…
View article: Back-focal-plane interferometric detection of nanoparticles in spatially confined microfluidic channels
Back-focal-plane interferometric detection of nanoparticles in spatially confined microfluidic channels Open
Nanoparticles are important in several areas of modern biomedical research. However, detection and characterization of nanoparticles is challenging due to their small size. Back-focal-plane interferometry (BFPI) is a highly sensitive techn…
View article: Microfluidic-based high-throughput optical trapping of nanoparticles
Microfluidic-based high-throughput optical trapping of nanoparticles Open
Engineering of a microfluidic channel leads to a substantial increase in the throughput for the optical trapping of nanoparticles.
View article: Wedge and gap plasmonic resonances in double nanoholes
Wedge and gap plasmonic resonances in double nanoholes Open
We study the plasmonic resonances of double nanoholes (DNHs) in metal films. These apertures exhibit the usual gap-mode Fabry-Pérot resonances, where the zeroth order resonance is determined by the waveguide cut-off and the first order res…