Ritu Gupta

About Ritu Gupta

Ritu Gupta, With an exceptional h-index of 24 and a recent h-index of 19 (since 2020), a distinguished researcher at Indian Institute of Technology Jodhpur, specializes in the field of Sensors, energy storage systems, Nanomaterials, Flexible Electronics.

His recent articles reflect a diverse array of research interests and contributions to the field:

Deciphering the influence of fluorine on the electrochemical performance of MAX and derived MXene by selective electrophilic fluorination

Scalable Supercapacitors

Porous SnO2 Nanosheets for Room Temperature Ammonia Sensing in Extreme Humidity

Nano-inks for supercapacitors

Detection of DMF and NH3 at Room Temperature Using a Sensor Based on a MoS2/Single-Walled Carbon Nanotube Composite

Spin‐controlled helical quantum sieve chiral spectrometer

Visibly Transparent Supercapacitors

Room Temperature Humidity Tolerant Xylene Sensor Using a Sn-SnO2 Nanocomposite

Ritu Gupta Information

University

Indian Institute of Technology Jodhpur

Position

Assistant Professor Department of Chemistry India

Citations(all)

2064

Citations(since 2020)

1195

Cited By

1377

hIndex(all)

24

hIndex(since 2020)

19

i10Index(all)

47

i10Index(since 2020)

41

Email

University Profile Page

Indian Institute of Technology Jodhpur

Ritu Gupta Skills & Research Interests

Sensors

energy storage systems

Nanomaterials

Flexible Electronics

Top articles of Ritu Gupta

Deciphering the influence of fluorine on the electrochemical performance of MAX and derived MXene by selective electrophilic fluorination

Authors

Gaurav Bahuguna,Snehraj Gaur,Avit Patel,Mohit Verma,S Kiruthika,Ritu Gupta

Journal

Materials Research Bulletin

Published Date

2024/1/1

The emerging class of MAX phases and corresponding MXenes offers a unique advantage of tunable surface functionalities, such as -O, -OH, and -F, which endow them with excellent electrochemical activity. This study focuses on the fluorination of the MAX phases and corresponding MXenes using an electrophilic fluorinating agent, Selectfluor (SF). The fluorination process was carried out to selectively fluorinate the MAX phase while minimizing etching effects, showcasing the distinct role of the electrophilic fluorine precursor over the conventional nucleophilic fluorinating agents. Intriguingly, the fluorinated MAX phase, with a fluorine content of 3.21 at%, demonstrated significantly enhanced electrochemical performance, exhibiting a two-fold increase in the specific capacitance compared to pristine MAX. Moreover, selective fluorination is further extended to MXene derivatives prepared through the conventional …

Scalable Supercapacitors

Authors

S Gaur,A. B. Urgunde,G Bahuguna,S Kiruthika,Ritu Gupta

Published Date

2023

In the past few decades, energyEnergy-storage technology has evolved rapidly as dependence on renewable energyRenewable energy sources have increased due to drastic changes in energyEnergy demands. A supercapacitorSupercapacitor finds many applicationsApplications that need high peak powerPower and energyEnergy boosts, such as wireless sensorSensor networks, regenerative braking in vehicles, IoT applicationsApplications, RF transmissions, backup powerPower supply, transport sector, energyEnergy harvesting systems, industrial and consumer electronics. Though the lab-scale supercapacitorsSupercapacitor perform well, there is considerable scope of improvement for commercially scalable supercapacitorsSupercapacitor. Low-cost, simple-processing, and high-performancePerformance material provides a possible solution for large-scale industrial efficient energyEnergy storage systems …

Porous SnO2 Nanosheets for Room Temperature Ammonia Sensing in Extreme Humidity

Authors

M. Verma,G. Bahuguna,Hossam Haick and Ritu Gupta Sukhwinder,Ankita Kumari,Dibyajyoti Ghosh

Journal

Materials Horizon

Published Date

2023/10/31

Gas sensors based on tin dioxide (SnO2) for the detection of ammonia (NH3) have become commercially available for environmental monitoring due to their reactive qualities when exposed to different gaseous pollutants. Nevertheless, their implementation in the medical field has been hindered by certain inherent drawbacks, such as needing to operate at high temperatures, lack of selectivity, unreliable operation under high-humidity conditions, and a lower detection limit. To counter these issues, this study created 2D nanosheets of SnO2 through an optimized solvothermal method. It was found that tuning the precursor solution's pH to either neutral or 14 led to aggregated or distributed, uniform-size nanosheets with a higher crystallinity, respectively. Remarkably, the SnO2 nanosheet sensor (SNS-14) displayed a much lower response to water molecules and specific reactivity to ammonia even when subjected to …

Nano-inks for supercapacitors

Authors

Snehraj Gaur,Ajay B Urgunde,S Kiruthika,Ritu Gupta

Published Date

2023/1/1

Supercapacitors (SCs) are energy storage devices applied in low–input power, flexible, and on-chip devices. In this chapter, the challenges and advantages of printed SCs are discussed, as well as nano-ink formulations, different printing methods, common issues in printing, materials for printing, and unique and novel device architectures of SCs enabled by nano-inks. Moreover, the future of printing SCs using nano-inks is discussed.

Detection of DMF and NH3 at Room Temperature Using a Sensor Based on a MoS2/Single-Walled Carbon Nanotube Composite

Authors

Sukhwinder Singh,Imtej Singh Saggu,Sukhjinder Singh,Nitish Kumar,Kaiwen Chen,Zhengxi Xuan,Ritu Gupta,Mark T Swihart,Sandeep Sharma

Journal

ACS Applied Nano Materials

Published Date

2023/6/13

Two-dimensional molybdenum disulfide (MoS2) with high surface area and layered structure has received substantial attention for its potential use in detecting volatile organic compounds (VOCs) and trace gases with good relative response and selectivity at room temperature. However, two of the long-standing challenges to broader use of MoS2 are its poor recovery kinetics and susceptibility to oxidation in a humid environment. To address these issues, we present a chemiresistive sensor based on a MoS2/SWCNTs composite as a sensing material for the dual detection of N,N-dimethylformamide (DMF) and ammonia (NH3) at room temperature. MoS2 supports SWCNTs by providing a superhydrophobic surface and imparting environmental stability along with an increased specific surface area. The composite-based sensor with 4 wt % SWCNTs enabled dual detection of DMF and NH3 down to 0.1 and 1 ppm …

Spin‐controlled helical quantum sieve chiral spectrometer

Authors

Arnab Maity,Yael Hershkovitz‐Pollak,Ritu Gupta,Weiwei Wu,Hossam Haick

Journal

Advanced Materials

Published Date

2023/6

This article reports on a molecular‐spin‐sensitive‐antenna (MSSA) that is based on stacked layers of organically functionalized graphene on a fibrous helical cellulose network for carrying out spatiotemporal identification of chiral enantiomers. The MSSA structures combine three complementary features: (i) chiral separation via a helical quantum sieve for chiral trapping, (ii) chiral recognition by a synthetically implanted spin‐sensitive center in a graphitic lattice; and (iii) chiral selectivity by a chirality‐induced‐spin mechanism that polarizes the local electronic band‐structure in graphene through chiral‐activated Rashba spin–orbit interaction field. Combining the MSSA structures with decision‐making principles based on neuromorphic artificial intelligence shows fast, portable, and wearable spectrometry for the detection and classification of pure and a mixture of chiral molecules, such as butanol (S and R), limonene …

Visibly Transparent Supercapacitors

Authors

S Kiruthika,Sneha Namuni,Ritu Gupta

Journal

Journal of Materials Chemistry A

Published Date

2023

Supercapacitors with novel functionalities such as transparency and flexibility are gaining attention to meet the increasing demand for intelligent and smart electronics. Transparent supercapacitors (TSCs) find application in modern appliances such as portable electronics and are especially inevitable for fully integrated transparent devices, thanks to their high-power density, fast charging and discharging ability, and longer life. Transparency is generally achieved by preparing thin films of active electrode material or by adopting lithographic methods for nanostructured electrodes that control the thickness and fill factor without significantly affecting intrinsic conductivity and capacitance. This review discusses all such approaches with a focus on the choice of electrode materials and their design and fabrication for achieving visible transparency in supercapacitors for advanced multifunctional devices. Additionally, it …

Room Temperature Humidity Tolerant Xylene Sensor Using a Sn-SnO2 Nanocomposite

Authors

Mohit Verma,Gaurav Bahuguna,Arpit Saharan,Snehraj Gaur,Hossam Haick,Ritu Gupta

Journal

ACS Applied Materials & Interfaces

Published Date

2023/1/18

Xylene is one of the representative indoor pollutants, even in ppb levels, that affect human health directly. Due to the non-polar and less reactive nature of xylene, its room temperature detection is challenging. This work demonstrates a metallic tin-doped Sn-SnO2 nanocomposite under controlled pH conditions via a simple solvothermal route. The Sn nanoparticles are uniformly distributed inside the SnO2 nanospheres of ∼70 nm with a high specific surface area of 118.8 m2/g. The surface of the Sn-SnO2 nanocomposite exhibits strong affinity toward benzene, toluene, ethylbenzene, and xylene (BTEX) compared to other polar volatile organic compounds (VOCs) such as ethanol, acetone, isopropyl alcohol, formaldehyde, and chloroform tested in this study. The sensor’s response is highest for xylene among BTEX molecules. Under ambient room temperature conditions, the sensor exhibits a linear response to …

SnO2 Nanoparticle-Reduced Graphene Oxide Hybrids for Highly Selective and Sensitive NO2 Sensors Fabricated Using a Component Combinatorial Approach

Authors

Mohit Verma,Gaurav Bahuguna,Shubhendra Shukla,Ritu Gupta

Journal

ACS Applied Nano Materials

Published Date

2022/12/15

The combinatorial design of sensors has been demonstrated as an effective strategy for rapidly screening sensing materials and optimizing functional parameters for high-performance sensors. In this work, we report the development of room-temperature NO2 sensors based on a SnO2–rGO composite following a componential combination approach. SnO2–rGO is synthesized via a single-step solvothermal technique, and the resulting product is separated into different layers using the Differential Centrifugation technique. Different components were used for fabricating individual chemiresistive devices and studied together by a combinatorial approach using a 2 × 2 sensor array. Among all the devices, the L1-based nanohybrid device exhibited a significant response of ∼3 to a low concentration of 80 ppm NO2 at room-temperature operation and fluctuating humidity (20–50% RH) at much faster speeds ∼5.6 s and …

2D materials: increscent quantum flatland with immense potential for applications

Authors

Pranay Ranjan*,Snehraj Gaur,Himanshu Yadav,Ajay B. Urgunde,Vikas Singh,Avit Patel,Kusum Vishwakarma,Deepak Kalirawana,Ritu Gupta*,Prashant Kumar*

Journal

Nano Convergence

Published Date

2022/6

Quantum flatland i.e., the family of two dimensional (2D) quantum materials has become increscent and has already encompassed elemental atomic sheets (Xenes), 2D transition metal dichalcogenides (TMDCs), 2D metal nitrides/carbides/carbonitrides (MXenes), 2D metal oxides, 2D metal phosphides, 2D metal halides, 2D mixed oxides, etc. and still new members are being explored. Owing to the occurrence of various structural phases of each 2D material and each exhibiting a unique electronic structure; bestows distinct physical and chemical properties. In the early years, world record electronic mobility and fractional quantum Hall effect of graphene attracted attention. Thanks to excellent electronic mobility, and extreme sensitivity of their electronic structures towards the adjacent environment, 2D materials have been employed as various ultrafast precision sensors such as gas/fire/light/strain sensors and in …

Scalable Production of Nickel Cobaltite Nanoplates using Solution-Processed Inks for OER Electrocatalysis

Authors

Ajay B. Urgunde,Gaurav Bahuguna,Anandita Dhamija,Vipin Kamboj,Ritu Gupta

Journal

Materials Research Bulletien

Published Date

2021/5

The large-scale fabrication of non-precious metal oxide electrocatalysts with reasonable control over catalytic active surface sites is critical for oxygen evolution reaction (OER). Herein, we report an industrially scalable, dip-coating method for the fabrication of 3D electrodes using Co and Ni thiolate hybrid inks. The solventless thermolysis of Co hexadecane thiolate in Ni butane thiolate (4:1) mixture results in 2D nanoplates of Ni-Co oxide (NCO) with spinel structure and superparamagnetic nature. The NCO acts as an electrocatalyst exhibiting excellent OER performance in alkaline media with low overpotential values of 310 mV and long-term stability. XPS studies reveal that Ni3+ and Co3+ species on the surface of NCO-20 nanoplates enhance the OER activity. The superparamagnetic NCO-20 shows enhancement in OER with the external magnetic field due to electron spin polarization. Thus, the present study is of …

Chemical Insights into Electrophilic Fluorination of Tin Oxide Layer for Photoelectrochemical Applications

Authors

Gaurav Bahuguna,Mohit Verma,Ritu Gupta

Journal

Journal of Materials Chemistry A

Published Date

2021

Recently, there has been substantial interest in the fluorination of nanomaterials-based thin films used in various optoelectronic devices for optimum charge transport across semiconducting layers. The discovery of electrophilic fluorinating agents such as Selectfluor® (F-TEDA) has led to the development of novel methods for fluorination of metal oxides such as tin oxide (SnO2) in this work. Herein, we elucidate the fluorination of SnO2 thin films using X-ray photoelectron spectroscopy (XPS) depth profiling. The interaction of the F-TEDA molecule with the SnO2 surface occurs via N–F bonds. Fluorine is found to occupy interstices and substitutional sites in the SnO2 lattice. The interstitial fluorine (1.21 at%) decays off by a depth of 61 nm in the SnO2 film. The substitutional fluorine (1.28 at%) in SnO2 results in remarkable changes in its electronic structure due to the lowering of oxygen defects by ∼80%. The electrical …

Nickel Cobaltite Nanoplates based Electrochemical Sensing Platform from Printable Inks for Simultaneous Detection of Dopamine and Uric Acid

Authors

A. B. Urgunde,Anandita. Dhamija,Ritu Gupta

Journal

Chemistry- An Asian Journal

Published Date

2021/10/28

2D metal oxide‐based nanomaterials have emerged as an exciting area of research owing to their rich electrochemical properties and diverse applications, including biosensors. In this work, we have synthesized ultra‐thin Co3O4, NiO, and NiCo2O4 nanostructures supported on a carbon cloth and printed graphite/Kapton substrates following thermal reduction of self‐assembled metal alkanethiolates. These nanostructures act as a sensing platform for simultaneous detection of dopamine (DA) and uric acid (UA), important biological molecules in physiological and pathological tests. The ultrathin 2D nanoplates of NiCo2O4 spinel formed in this study exhibit high electrochemical activity than pristine NiO and Co3O4. The electrochemical characterization studies indicate that NiCo2O4 possesses a high potential for DA and UA with a peak separation of ∼140 mV, high sensitivity, and excellent selectivity. The low‐cost …

Composition, substrates and methods thereof

Published Date

2020/4/21

The present disclosure provides compositions comprising colloidal matter in solvent, employed for crackle formation when exposed to surface of a substrate. The said compositions crackle spontaneously without any external stimuli when exposed to the substrate surface as a film. The present disclosure also relates to substrates having a film by exposure to said composition and a method of preparing said substrate. The present disclosure also relates to patterned substrates fabricated with material or energy inputs deposited in template formed by crackling of the film and a method of preparing said patterned substrate and a kit for obtaining such substrates. The present disclosure also relates to using the said substrates for various applications specifically in the field of electronics or optoelectronics.

Ultrasensitive Organic Humidity Sensor with High Specificity for Healthcare Applications

Authors

G Bahuguna,V Adhikary,R. K. Sharma,Ritu Gupta

Journal

Electroanalysis

Published Date

2020

Humidity sensors have gained immense importance as non‐invasive, wearable healthcare devices for personal care as well as disease diagnostics. However, non‐specificity, poor stability at extreme conditions, and low sensitivity of the humidity sensor inhibit its usage as a health monitoring device. In the present study, N−F containing organic molecule, SelectfluorTM (F‐TEDA) based humidity sensors with ∼1–2 mm long needle‐shaped crystals is fabricated on interdigitated electrodes resulting in excellent performance. The unidirectional growth of crystals led to the formation of a conduction pathway for water molecules across the crystal, which otherwise are non‐conducting. The as‐fabricated humidity sensor at an operational voltage of 0.8 V displays a sensitivity of six orders in magnitude, best reported so far. The sensor does not exhibit any response upon exposure to various volatile organic compounds …

Scalable Fabrication of Scratch-Proof Transparent Al/F–SnO2 Hybrid Electrodes with Unusual Thermal and Environmental Stability

Authors

Indrajit Mondal,Gaurav Bahuguna,Mukhesh K Ganesha,Mohit Verma,Ritu Gupta,Ashutosh K Singh,Giridhar U Kulkarni

Journal

ACS Applied Materials & Interfaces

Published Date

2020/11/18

Fabrication protocols of transparent conducting electrodes (TCEs), including those which produce TCEs of high values of figure of merit, often fail to address issues of scalability, stability, and cost. When it comes to working with high-temperature stable electrodes, one is left with only one and that too, an expensive choice, namely, fluorine-doped SnO2 (FTO). It is rather difficult to replace FTO with a low-cost TCE due to stability issues. In the present work, we have shown that an Al nanomesh fabricated employing the crack template method exhibits extreme thermal stability in air even at 500 °C, compared with that of FTO. In order to fill in the non-conducting island regions present in between the mesh wires, a moderately conducting material SnO2 layer was found adequate. The innovative step employed in the present work relates to the SnO2 deposition without damaging the underneath Al, which is a challenge in …

Ni ink-catalyzed conversion of a waste polystyrene–sugar composite to graphitic carbon for electric double-layer supercapacitors

Authors

Ajay B Urgunde,Gaurav Bahuguna,Anandita Dhamija,Parijat P Das,Ritu Gupta

Journal

ACS Applied Electronic Materials

Published Date

2020/9/7

The disposal of organic waste materials such as polymers is a serious problem to natural ecosystems as some of them can be non-biodegradable and potentially toxic. Thus, there is immense interest in developing processes that convert waste polystyrene into useable carbon. In this work, we developed a unique approach for obtaining graphitic carbon from waste polystyrene as a raw carbon source. The conversion process is catalyzed using the Ni-butanethiolate ink in ultralow quantities under an optimized temperature (800 °C) in the presence of 5% hydrogen in nitrogen. Interestingly, macroporous sugar cubes are used as a soft template to hold polystyrene and the catalyst together during decomposition, eliminating the need for a high-pressure source for retaining carbon for graphitization at high temperatures. An additional step of hydrogen annealing for pyrolyzed carbon nullifies the surface effects and …

Innovative Approach to Photo-Chemiresistive Sensing Technology: Surface-Fluorinated SnO2 for VOC Detection

Authors

Gaurav Bahuguna,Indrajit Mondal,Mohit Verma,Manish Kumar,Saswata Bhattacharya,Ritu Gupta,Giridhar U Kulkarni

Journal

ACS applied materials & interfaces

Published Date

2020/7/25

Transparent electronics continues to revolutionize the way we perceive futuristic devices to be. In this work, we propose a technologically advanced volatile organic compound (VOC) sensor in the form of a thin-film transparent display fabricated using fluorinated SnO2 films. A solution-processed method for surface fluorination of SnO2 films using Selectfluor as a fluorinating agent has been developed. The doped fluorine was optimized to be <1%, resulting in a significant increase in conductivity and reduction in persistent photoconductivity accompanied by a faster decay of the photogenerated charge carriers. A combination of these modified properties, together with the intrinsic sensing ability of SnO2, was exploited in designing a transparent display sensor for ppm-level detection of VOCs at an operating temperature of merely 150 °C. Even a transparent metal mesh heater is integrated with the sensor for ease of …

See List of Professors in Ritu Gupta University(Indian Institute of Technology Jodhpur)

Ritu Gupta FAQs

What is Ritu Gupta's h-index at Indian Institute of Technology Jodhpur?

The h-index of Ritu Gupta has been 19 since 2020 and 24 in total.

What are Ritu Gupta's top articles?

The articles with the titles of

Deciphering the influence of fluorine on the electrochemical performance of MAX and derived MXene by selective electrophilic fluorination

Scalable Supercapacitors

Porous SnO2 Nanosheets for Room Temperature Ammonia Sensing in Extreme Humidity

Nano-inks for supercapacitors

Detection of DMF and NH3 at Room Temperature Using a Sensor Based on a MoS2/Single-Walled Carbon Nanotube Composite

Spin‐controlled helical quantum sieve chiral spectrometer

Visibly Transparent Supercapacitors

Room Temperature Humidity Tolerant Xylene Sensor Using a Sn-SnO2 Nanocomposite

...

are the top articles of Ritu Gupta at Indian Institute of Technology Jodhpur.

What are Ritu Gupta's research interests?

The research interests of Ritu Gupta are: Sensors, energy storage systems, Nanomaterials, Flexible Electronics

What is Ritu Gupta's total number of citations?

Ritu Gupta has 2,064 citations in total.

What are the co-authors of Ritu Gupta?

The co-authors of Ritu Gupta are Mikkel Jørgensen, Timothy S Fisher, Mukundan Thelakkat, Giridhar U Kulkarni, Markus Hösel, Amy Marconnet.

    Co-Authors

    H-index: 72
    Mikkel Jørgensen

    Mikkel Jørgensen

    Danmarks Tekniske Universitet

    H-index: 68
    Timothy S Fisher

    Timothy S Fisher

    University of California, Los Angeles

    H-index: 68
    Mukundan Thelakkat

    Mukundan Thelakkat

    Universität Bayreuth

    H-index: 59
    Giridhar U Kulkarni

    Giridhar U Kulkarni

    Jawaharlal Nehru Centre for Advanced Scientific Research

    H-index: 38
    Markus Hösel

    Markus Hösel

    Danmarks Tekniske Universitet

    H-index: 27
    Amy Marconnet

    Amy Marconnet

    Purdue University

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