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Expertise in Research Field

  • Organic Electronics

  • Device Physics (Diode and Thin Film Transistors)

  • Sensors and Detectors

  • Energy Harvesting Device

  • Nanotechnology (Nanostructure, Nanomaterial, Nanogaps)

  • Flexible and Wearable Device

Key Achievements

                                                                                          PhD​

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  • Gained expertise in organic electronic devices and developed a novel sensing approach using the dielectric layer of OFETs as the sensing medium without compromising low operating voltage; demonstrated highly responsive sensing to heat, humidity, and light, with tunability via high gate electric fields.

  • Designed and validated moisture-induced energy harvesting devices with integrated functionality as self-biased humidity sensors.

  • Developed silver nanorod-based strain sensors for advanced biomedical applications, including blood profile monitoring and robotic skin.

Pictures of Sensors Developed During PhD

A spirometer based on this temperature sensor is currently undergoing clinical trials in India

                                                                                           Post PhD 

  • At University College London (UCL), I developed high-k polymer nanocomposites for cost-effective, high-resolution display technologies by introducing a novel concept of functionalized hetero-phase filler-based composites to enhance dielectric properties and achieve a high dielectric constant.

  • Gained expertise in functional chemistry by modifying nanoparticles using self-assembled monolayers (SAMs).

UCL_edited.jpg

  • At KAUST, observed a phenomenon in organic semiconductors known as the oxygen doping and hydrogen de-doping cycle, and leveraged it to develop a highly responsive, selective, and fast organic hydrogen sensor.

  • Developed ultra-fast humidity sensors using biopolymers as the active sensing layer in nanogap-based devices, fabricated through a scalable adhesion lithography method, and demonstrated their application in non-contact switches and respiratory monitoring.

  • Exploring polarization effects in OFET dielectric materials to improve device performance for memory and logic circuit applications.

Organic Hydrogen Sensor and Sensing Mechanism

H2_edited.jpg

Demonstrations of Organic Hydrogen Sensor

Process steps for adhesion lithography-based nanogap fabrication

Nanogap based ultra-fast Organic humidity Sensor

Demonstration of applications of the ultra-fast humidity sensor

Research Laboratory Setup

PhD (2014-2020)

  • Organic Molecular Beam Deposition System: Installed and optimised for precise thin-film growth of organic semiconducting materials such as Pentacene, Copper Phthalocyanine, Cobalt Phthalocyanine, DNTT, and C8BTBT through controlled sublimation.

  • Physical Vapour Deposition (PVD) System: Configured for the fabrication of organic nanowires and nanorods using thermal sublimation techniques with various organic semiconductors.

  • Anodization Setup: Developed and integrated for controlled electrochemical oxidation processes used in dielectric layer formation and surface treatment.

  • OFET Characterisation Platform: Established a measurement setup using probe stations and Source Measurement Units (SMUs) for electrical characterisation of organic field-effect transistors.

  • Dielectric Property Measurement System: Set up using a Capacitance Measurement Unit (CMU) to evaluate the dielectric constant, loss tangent, and frequency-dependent behaviour of insulating materials.

  • Custom Humidity Sensing Setup: Designed and fabricated an environmental control chamber with integrated sensors and data acquisition for accurate humidity response studies.

  • Strain Sensing Measurement Setup: Constructed a platform to test and calibrate strain sensors under various mechanical deformations, suitable for wearable and flexible electronics research.

Post-PhD (2020-2025)​​

  • Dielectric Measurement Setup at UCL:  Developed a system to characterise high-k polymer nanocomposites for dielectric property evaluation.

  • Humidity Sensing Setup at KAUST: Designed and built a controlled humidity sensing system integrated with a MATLAB interface for real-time data acquisition and analysis.

  • Hydrogen Sensing Setup at KAUST: Developed a custom hydrogen sensing platform with precise gas flow control and a MATLAB-based interface for testing under various environmental conditions.

  • Porous Film Fabrication Setup: Implemented the Breath Figure Method to fabricate porous thin films with controllable morphology for sensor applications.

  • CMOS Circuit Measurement Setup: Characterised organic CMOS inverters under diverse environmental and electrical conditions.

Experience: Gained hands-on experience in using the synchrotron facility at the Indian Beamline (BL18B), Photon Factory, KEK, Japan.

Hands on Experience during PhD work

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