Rapti Ghosh

ORCID: 0000-0002-0999-6217
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About
Contact & Profiles
Research Areas
  • 2D Materials and Applications
  • Perovskite Materials and Applications
  • Advanced Sensor and Energy Harvesting Materials
  • Quantum Dots Synthesis And Properties
  • Graphene research and applications
  • Nanowire Synthesis and Applications
  • Gas Sensing Nanomaterials and Sensors
  • Luminescence and Fluorescent Materials
  • MXene and MAX Phase Materials
  • Advanced Photocatalysis Techniques
  • Advanced Thermoelectric Materials and Devices
  • Solid State Laser Technologies
  • Plasmonic and Surface Plasmon Research
  • Nanoplatforms for cancer theranostics
  • Conducting polymers and applications
  • Advanced MEMS and NEMS Technologies
  • Advanced biosensing and bioanalysis techniques
  • Semiconductor Quantum Structures and Devices
  • Organic and Molecular Conductors Research
  • Thermal properties of materials
  • Carbon and Quantum Dots Applications
  • Thermal Radiation and Cooling Technologies
  • Advanced Materials and Mechanics
  • Semiconductor Lasers and Optical Devices
  • Electrochemical sensors and biosensors

Argonne National Laboratory
2024-2025

University of Chicago
2024-2025

National Taiwan University
2019-2023

Institute of Molecular Biology, Academia Sinica
2020-2023

Institute of Atomic and Molecular Sciences, Academia Sinica
2020-2023

National Central University
2019-2023

Academia Sinica
2021

National Center for Theoretical Sciences
2021

Chang Gung University
2021

2D materials' junctions have demonstrated capabilities as metal-free alternatives for the hydrogen evolution reaction (HER). To date, HER has been limited to heterojunctions of different compositions or band structures. Here, potential local strain modulation based on wrinkled heterostructures is demonstrated, which helps realize photoelectrocatalytically active junctions. By forming regions high and low tensile in WS2 monolayers, modification their structure internal electric field due...

10.1002/adma.202210746 article EN Advanced Materials 2023-02-09

The clean production of hydrogen from water using sunlight has emerged as a sustainable alternative toward large-scale energy generation and storage. However, designing photoactive semiconductors that are suitable for both light harvesting splitting is pivotal challenge. Atomically thin transition metal dichalcogenides (TMD) considered promising photocatalysts because their wide range available electronic properties compositional variability. trade-offs between carrier transport efficiency,...

10.1021/acsnano.1c10772 article EN ACS Nano 2022-04-04

This study highlights the versatile applications of inkjet-printed graphene/ethyl cellulose (EC) in various electronic devices. Key points include its p-type doping achieved through low-temperature annealing, use as a temperature sensor at higher annealing temperatures, and effectiveness electrochemical sensing, such phosphate detection. The precise tuning oxygen composition EC graphene via thermal was crucial to these capabilities. Electrical characterization showed consistent behavior...

10.1021/acsami.4c21469 article EN ACS Applied Materials & Interfaces 2025-02-11

Metal–organic frameworks (MOFs) are superior for multiple applications including drug delivery, sensing, and gas storage because of their tunable physiochemical properties fascinating architectures. Optoelectronic application MOFs is difficult porous geometry conductivity issues. Recently, a few optoelectronic devices have been fabricated by suitable design integrating with other materials. However, demonstration laser action arising from as intrinsic gain media still remains challenging,...

10.1021/acsami.0c07890 article EN ACS Applied Materials & Interfaces 2020-07-17

The recently emerged metal-halide hybrid perovskite (MHP) possesses superb optoelectronic features, which have obtained great attention in solid-state lighting, photodetection, and photovoltaic applications. Because of its excellent external quantum efficiency, MHP has promising potential for the manifestation ultralow threshold optically pumped laser. However, demonstration an electrically driven laser remains a challenge because vulnerable degradation perovskite, limited exciton binding...

10.1021/acsnano.2c09522 article EN ACS Nano 2023-03-10

Nanoscrolls are a class of nanostructures where atomic layers 2D materials stacked consecutively in coaxial manner to form 1D spiral topography. Self-assembly chemical vapor deposition grown WS2 monolayer into quasi-1D van der Waals scroll structure instigates plethora unique physiochemical properties significantly different from its counterparts. The physical such nanoscrolls can be greatly manipulated upon hybridizing them with high-quantum-yield colloidal quantum dots, forming 0D/2D...

10.1002/smll.202003944 article EN Small 2020-10-20

Two-dimensional (2D) material nanocomposites have emerged as a system for discovering new physical phenomena and developing novel devices. However, because of the low density states most two-dimensional materials such graphene, heterostructure suffers from an enhanced depletion region, which can greatly reduce efficiency charge carrier transfer deteriorate device performance. To circumvent this difficulty, here we propose alternative approach by inserting second 2D mediator with heavy...

10.1021/acsami.9b08294 article EN ACS Applied Materials & Interfaces 2019-07-08

Integrated wearable optoelectronic devices synchronously exhibit contradictory phenomena of exciton generation and recombination with their control by an external electric field, the mechanical strain associated this has widespread applications. However, a demonstration such single-miniaturized multifunctional optoelectronics remains daunting challenge. A versatile metal–organic framework (MOF) possesses tailorable outstanding optical properties through inherent multiple charge-transfer...

10.1021/acsaelm.2c00173 article EN ACS Applied Electronic Materials 2022-05-11

Control of the precursor transport through oxygen dosing yields increased MoS 2 coverage and connectivity between crystalline domains.

10.1039/d1ra06933k article EN cc-by RSC Advances 2022-01-01

Flexible, stretchable, and bendable electronics optoelectronics have a great potential for wide applications in smart life. An environmentally friendly, cost effective wide-angle emission laser is indispensable the emerging technology. In this work, circumvent challenge issue, cavity-free stretchable white light lasers based on all carbon materials been demonstrated by integration of fluorescent quantum dots (CQDs) crumpled graphene. The typical spectrum all-carbon has CIE chromaticity...

10.1364/oe.457921 article EN cc-by Optics Express 2022-05-18

Roll-up technology provides a feasible approach to transform patterned planar membranes into three-dimensional (3D) tubular microstructures. The geometry enables the confinement of local electromagnetic field and strengthens photon–matter interaction inside structure. By applying roll-up method, we fabricated 3D photodetectors from graphene/quantum dots (QDs) embedded polymer around an optical fiber. These exhibit 5 times higher photoresponsivity compared their counterparts. enhanced...

10.1021/acsaelm.2c00871 article EN ACS Applied Electronic Materials 2022-10-27

Two-dimensional (2D) materials promise advances in electronic devices beyond Moore’s scaling law through extended functionality, such as non-monotonic dependence of device parameters on input parameters. However, the robustness and performance effects like negative differential resistance (NDR) anti-ambipolar behavior have been limited scale by relying atomic defects complex heterojunctions. In this paper, we introduce a novel concept that utilizes quantum capacitance junctions between 2D...

10.3390/nano14110972 article EN cc-by Nanomaterials 2024-06-03

Upon laser irradiation, the sensitivity gets enhanced up to 22 times by insertion of two-dimensional materials having a large density state due speeding carrier dissociation at heterojunction interface.

10.1364/fio.2020.jm6a.6 article EN Frontiers in Optics + Laser Science 2021 2020-01-01

This publisher's note contains corrections to [Opt. Express30, 20213 (2022)10.1364/OE.457921].

10.1364/oe.465976 article EN cc-by Optics Express 2022-06-09

Abstract Recently emerged metal-halide hybrid perovskite (MHP) possesses superb optoelectronic features, which have great attention in solid-state lighting, photodetection, and photovoltaic applications. Because of its excellent external quantum efficiency, MHP acquires enormous potential for manifestation ultra-low threshold optically pumped laser. However, demonstration electrical-driven laser remains a challenge because vulnerable degradation perovskite, limited exciton binding energy,...

10.21203/rs.3.rs-1121122/v1 preprint EN cc-by Research Square (Research Square) 2021-12-13

The spirally rolled 2D material based light-trapping nanocavity structure with QDs as scattering centers achieves unprecedently low lasing threshold (~0.008 kW cm -2 ) and 12 fold brighter parallel-polarized luminescence than that of the perpendicular one.(/p)(p)Twisting morphology atomically thin layer materials introduces some striking physio- chemical phenomena which are significantly absent in their bulk well sheet counterpart. By exploiting flexural strength, these (eg. MoS 2 , WS can...

10.1364/fio.2021.fm3c.2 article EN Frontiers in Optics + Laser Science 2021 2021-01-01
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