A5049338090- Microfluidic and Bio-sensing Technologies
- Microfluidic and Capillary Electrophoresis Applications
- Surface Modification and Superhydrophobicity
- Fluid Dynamics and Heat Transfer
- Internet Traffic Analysis and Secure E-voting
- Electrowetting and Microfluidic Technologies
- Privacy-Preserving Technologies in Data
- Electrohydrodynamics and Fluid Dynamics
- Cryptography and Data Security
- Fluid dynamics and aerodynamics studies
- Privacy, Security, and Data Protection
- Icing and De-icing Technologies
- Aerosol Filtration and Electrostatic Precipitation
- Nanopore and Nanochannel Transport Studies
- Cellular transport and secretion
- Lipid Membrane Structure and Behavior
- Granular flow and fluidized beds
- Spacecraft and Cryogenic Technologies
- Micro and Nano Robotics
- RNA and protein synthesis mechanisms
- Wind Energy Research and Development
- Orthopedic Infections and Treatments
- Heat Transfer and Optimization
- Supramolecular Self-Assembly in Materials
- Adhesion, Friction, and Surface Interactions
Indian Institute of Technology Delhi
2023-2024
Northumbria University
2018-2024
Apollo Hospitals
2024
Ashoka University
2023-2024
University of Michigan
2023-2024
IITB-Monash Research Academy
2013-2022
Indian Institute of Technology Bombay
2013-2022
Indian Institute of Science Bangalore
2020
National Institute of Technology Rourkela
2020
Iowa State University
2016-2018
Superhydrophobic coatings and slippery liquid-infused porous surfaces (SLIPS) have shown their potentials in self-cleaning, anti-icing, anti-erosion, antibiofouling applications. Various studies been done on controlling the droplet impact such using passive methods as modifying lubricant layer thickness SLIPS. Despite effectiveness, lack on-demand control over dynamics of droplets. This paper introduces a new method to actively onto superhydrophobic SLIPS surface acoustic waves (SAWs). In...
Icing, fogging, and frosting cause safety hazards, reduced energy efficiency, operation difficulties in various sectors including aerospace renewable energy. Traditional methods for mitigating these hazards are often based on active transducers that either inconvenient, intensive, or utilizing chemicals detrimental to the environment lacking long-term stability. To tackle challenges of situ monitoring fogging icing structural surfaces, we explored an integrated platform by combining...
Fusion of biological membranes is mediated by distinct integral membrane proteins, e.g., soluble N -ethylmaleimide-sensitive factor attachment protein receptors and viral fusion proteins. Previous work has indicated that the transmembrane segments (TMSs) such proteins play an important role in fusion. Furthermore, peptide mimics part can drive liposomes, evidence had been obtained fusogenicity depends on their conformational flexibility. To test this hypothesis, we present a series unnatural...
The prospect of thermal energy harvesting in extreme environments, such as space or at microscales, offers unique opportunities and challenges for the development alternate conversion technologies. At microscales mechanical friction presents a challenge form losses wear, while presence high temperature differences locally available resources inspire new types heat engines planetary exploration. Recently, levitation using thin-film boiling, via Leidenfrost effect, has been explored to convert...
Ice nucleation and accretion on structural surfaces are sources of major safety operational concerns in many industries including aviation renewable energy. Common methods for tackling these active ones such as heating, ultrasound, chemicals or passive surface coatings. In this study, we explored the ice adhesion properties slippery coated substrates by measuring shear forces required to remove a glaze block substrates. Among studied nanostructured nanoscale [i.e., superhydrophobic coating,...
Droplet impact behavior on a solid surface is critical for many industrial applications such as spray coating, food production, printing, and agriculture. For all of these applications, common challenge to modify control the regime contact time droplets. This becomes more non-Newtonian liquids with complex rheology. In this research, we explored dynamics (by adding different concentrations Xanthan into water) superhydrophobic surfaces. Our experimental results show that by increasing...
Overcoming friction while generating useful torque is a challenge for micro engines. Here we report the development of microscale engine that utilizes transition boiling as mode propulsion and Leidenfrost effect friction-less bearing. The shows significantly improved performance compared to engine, which uses vapor entrainment mechanism (up 3 orders magnitude higher efficiency). We characterize with temperature develop an analytical model compare experimental observations. Our results...
Ice accretion on economically valuable and strategically important surfaces poses significant challenges. Current anti-/de-icing techniques often have critical issues regarding their efficiency, convenience, long-term stability, or sustainability. As an emerging ice mitigation strategy, the thin-film surface acoustic wave (SAW) has great potentials due to its high energy efficiency effective integration structural surfaces. However, processes activated by SAWs involve complex interfacial...
The Leidenfrost phenomenon (as when a bead of water skates atop trapped steam across hot griddle) receives much interest for transporting droplets with low friction. While linear motion is eased by friction, changing direction becomes difficult, without constraint walls. authors use the concept negative feedback design substrate structure to achieve transport along complex pathways, These paths furthermore allow control droplet's position, while maintaining speed and intrinsic self-centering...
Overcoming friction between moving components is important for reducing energy losses and component wear. Hydrodynamic lubrication via thin-film boiling provides an opportunity reduced mass transport. A common example of such the Leidenfrost effect, where a liquid droplet levitates on cushion its own vapor surface heated to temperatures above liquid's point. An asymmetry in this flow, self-propels due viscous drag, converting thermal mechanical motion, like heat engine. Although levitation...
Manipulation of particles suspended in a fluid can be achieved using low frequency vibrations an open volume. The collection at the solid-liquid (lower) interface is attributed to generation resonant capillary waves liquid-air (upper) interface. resulting periodic flow field points hydrodynamic focusing mechanism which collects over multiple cycles. This process demonstrated by modelling produced rectangular chamber undergoing horizontal oscillation. A particle tracing algorithm then used...
The Leidenfrost effect allows droplets to be transported on a virtually frictionless layer of vapor above superheated substrate. substrates are normally topographically structured using subtractive techniques produce saw-tooth, herringbone, and other patterns bulk heated, leading significant challenges in energy consumption controlled operation. Here, we propose planar lithographic approach levitate propel temperature profiles, which can spatially patterned time. We show that micro-patterned...
The micropump is an integral part of any microfluidic system, for applications in diagnostics, bioengineering, drug delivery, and lab-on-chip devices. Plant leaves provide natural inspiration designing evaporation-based passive micropumps, but development such bioinspired pumps limited by fabrication challenges plus a lack understanding the details pumping leaves. This study uses simple yet scalable method to fabricate leaf-mimicking structure from readily available materials. A model...
Manipulating small particles in a liquid is the basis of lab-on-a chip technology, but principle scale flows that smaller particle, more it tends to follow ambient flow, and difficult concentrate or control. The authors here apply second-order acoustic fields (so-called streaming fields) at low frequencies, find theoretically by combining with capillary waves, very can be collected. They confirm experimentally as 50 nm diameter collected using this approach.
Particle movement in vibration assisted microfluidic systems is significantly affected by time-averaged streaming flows. These flows can demonstrate either particle collection or dispersion characteristics, depending on the parameters used and system specifics. Here we investigate within vertically actuated open rectangular chambers at frequencies range of 100 Hz. Capillary waves, created water-air interface under action low frequency vibration, generate fields liquid bulk. In addition,...
This paper is concerned with designing and numerically implementing a V2X (Vehicle-to-Vehicle Vehicle-to-Infrastructure) control system architecture for platoon of autonomous vehicles. The integrates the well-known Intelligent Driver Model (IDM) Autonomous Driving Vehicles (ADVs) Vehicle-to-Infrastructure (V2I) Communication. main aim to address practical implementation issues such as well safety security concerns traffic environments. To this end, we first investigated channel estimation...