Shailabh Kumar
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View article: Nucleic Acid Amplification‐Based Technologies (NAAT)—Toward Accessible, Autonomous, and Mobile Diagnostics
Nucleic Acid Amplification‐Based Technologies (NAAT)—Toward Accessible, Autonomous, and Mobile Diagnostics Open
The ongoing pandemic and increasing frequency of infectious disease outbreaks due to climate change, urbanization, and global human migration have put great focus on nucleic acid amplification‐based diagnostic technologies (NAAT). These me…
View article: All-optical control of high-purity trions in nanoscale waveguide
All-optical control of high-purity trions in nanoscale waveguide Open
The generation of high-purity localized trions, dynamic exciton–trion interconversion, and their spatial modulation in 2D semiconductors are building blocks for the realization of trion-based optoelectronic devices. Here, we present a meth…
View article: Low cost centrifugal melt spinning for distributed manufacturing of non-woven media
Low cost centrifugal melt spinning for distributed manufacturing of non-woven media Open
Centralized manufacturing and global supply chains have emerged as an efficient strategy for large-scale production of goods throughout the 20th century. However, while this system of production is highly efficient, it is not resilient. Th…
View article: Drift-dominant exciton funneling and trion conversion in 2D semiconductors on the nanogap
Drift-dominant exciton funneling and trion conversion in 2D semiconductors on the nanogap Open
Understanding and controlling the nanoscale transport of excitonic quasiparticles in atomically thin two-dimensional (2D) semiconductors are crucial to produce highly efficient nano-excitonic devices. Here, we present a nanogap device to s…
View article: Applying heat and humidity using stove boiled water for decontamination of N95 respirators in low resource settings
Applying heat and humidity using stove boiled water for decontamination of N95 respirators in low resource settings Open
Global shortages of N95 respirators have led to an urgent need of N95 decontamination and reuse methods that are scientifically validated and available world-wide. Although several large scale decontamination methods have been proposed (hy…
View article: Low-threshold exciton transport and control in atomically thin semiconductors
Low-threshold exciton transport and control in atomically thin semiconductors Open
Understanding and controlling the nanoscale transport of excitonic quasiparticles in atomically thin 2D semiconductors is crucial to produce highly efficient nano-excitonic devices. Here, we present a nano-gap device to selectively confine…
View article: Droplet tilings for rapid exploration of spatially constrained many-body systems
Droplet tilings for rapid exploration of spatially constrained many-body systems Open
Significance Advances in material fabrication have made it possible to produce materials with an increasing range of geometries, including those with no precedent in nature. However, the relationships between geometry and state or the dyna…
View article: Review of the Breathability and Filtration Efficiency of Common Household Materials for Face Masks
Review of the Breathability and Filtration Efficiency of Common Household Materials for Face Masks Open
The World Health Organization and the United States Centers for Disease Control have recommended universal face masking by the general public to slow the spread of COVID-19. A number of recent studies have evaluated the filtration efficien…
View article: Máscaras do Bem: An analysis of face-mask performance from a volunteer mask-making initiative in Ribeirão Preto, Brazil
Máscaras do Bem: An analysis of face-mask performance from a volunteer mask-making initiative in Ribeirão Preto, Brazil Open
While performance was inferior to standard comparators, the masks investigated in this study afforded a level of protection in the absence of alternatives, especially in non-aerosol generating contexts. The findings of this study are usefu…
View article: Vectorchip: Microfluidic platform for highly parallel bite by bite profiling of mosquito-borne pathogen transmission
Vectorchip: Microfluidic platform for highly parallel bite by bite profiling of mosquito-borne pathogen transmission Open
Mosquito bites transmit a number of human pathogens resulting in potentially fatal diseases including malaria, dengue, chikungunya, West Nile encephalitis, and Zika. Although female mosquitoes transmit pathogens via salivary droplets depos…
View article: Evaporative self-assembly of motile droplets
Evaporative self-assembly of motile droplets Open
Self-assembly is the underlying building principle of biological systems and represents a promising approach for the future of manufacturing, but the yields are often limited by undesirable metastable states. Meanwhile, annealing methods h…
View article: Overcoming evanescent field decay using 3D-tapered nanocavities for on-chip targeted molecular analysis
Overcoming evanescent field decay using 3D-tapered nanocavities for on-chip targeted molecular analysis Open
Enhancement of optical emission on plasmonic nanostructures is intrinsically limited by the distance between the emitter and nanostructure surface, owing to a tightly-confined and exponentially-decaying electromagnetic field. This fundamen…
View article: Applying Heat and Humidity using Stove Boiled Water for Decontamination of N95 Respirators in Low Resource Settings
Applying Heat and Humidity using Stove Boiled Water for Decontamination of N95 Respirators in Low Resource Settings Open
Global shortages of N95 respirators have led to an urgent need of N95 decontamination and reuse methods that are scientifically validated and available world-wide. Although several large scale decontamination methods have been proposed (hy…
View article: Project 1000 x 1000: Centrifugal melt spinning for distributed manufacturing of N95 filtering facepiece respirators
Project 1000 x 1000: Centrifugal melt spinning for distributed manufacturing of N95 filtering facepiece respirators Open
The COVID-19 pandemic has caused a global shortage of personal protective equipment. While existing supply chains are struggling to meet the surge in demand, the limited supply of N95 filtering facepiece respirators (FFRs) has placed healt…
View article: Numerical Investigation of Pressure Drop for Various Models of Catalytic Converter to Capture CO2 Emission using Activated Carbon
Numerical Investigation of Pressure Drop for Various Models of Catalytic Converter to Capture CO2 Emission using Activated Carbon Open
Internal combustion engines are found to be extensively used in both mobile and stationary applications. The major drawbacks in diesel engines are the release of harmful gases like HC, CO, NOx and PM into atmosphere. There is several pre c…
View article: High-performance flexible metal-on-silicon thermocouple
High-performance flexible metal-on-silicon thermocouple Open
We have demonstrated metal-on-silicon thermocouples with a noticeably high Seebeck coefficient and an excellent temperature-sensing resolution. Fabrication of the thermocouples involved only simple photolithography and metal-liftoff proced…
View article: BIOINSPIRED MULTIFUNCTIONAL NANOSTRUCTURES FOR MICRO-OPTICAL IMPLANTS
BIOINSPIRED MULTIFUNCTIONAL NANOSTRUCTURES FOR MICRO-OPTICAL IMPLANTS Open
We have demonstrated, for the first time, the use of multifunctional biophotonic nanostructures on an implantable medical device to improve its optical readout performance and anti-biofouling properties.Inspired by the unique transmissive …
View article: Template-Stripped Multifunctional Wedge and Pyramid Arrays for Magnetic Nanofocusing and Optical Sensing
Template-Stripped Multifunctional Wedge and Pyramid Arrays for Magnetic Nanofocusing and Optical Sensing Open
We present large-scale reproducible fabrication of multifunctional ultrasharp metallic structures on planar substrates with capabilities including magnetic field nanofocusing and plasmonic sensing. Objects with sharp tips such as wedges an…