Shuvra Mondal | ETRI, South Korea (original) (raw)

Papers by Shuvra Mondal

Research paper thumbnail of A Research on New-Concept Graphene Devices with Atom-Level Property Controls

ETRI Project Report, 2017

Research paper thumbnail of Tailoring 2D Materials by Structural Engineering for Flexible Pressure-Temperature and Humidity Sensing Devices

Research paper thumbnail of Development of Basic Technologies for 3D Photo-Electronics

Research paper thumbnail of Mutifunctional EMI Shielding and Sensing Applications based on Low-dimensional Nanomaterials

Research paper thumbnail of Assessment of the 50 % and 95 % effective paratracheal forces for occluding the esophagus in anesthetized patients

Journal of Clinical Monitoring and Computing, 2021

This study aimed to evaluate the 50% and 95% effective paratracheal forces for occluding the esop... more This study aimed to evaluate the 50% and 95% effective paratracheal forces for occluding the esophagus in anesthetized patients. In 46 anesthetized patients, the upper esophagus was examined using ultrasonography, and the lower paratracheal area over the esophagus just above the clavicle was marked. Manual paratracheal force was applied over that area using a novel pressure sensing device set-up. In the first patient, a 20 N paratracheal force was applied, and the patency of the esophagus was assessed by advancing the esophageal stethoscope. Unsuccessful advancement of the esophageal stethoscope was considered an effective paratracheal force. If advancement of the esophageal stethoscope was successful, the paratracheal force was increased by 2 N for the next patient, and if it was unsuccessful, the force was decreased by 2 N for the next patient. These sequential tests were performed using 12- and 18-Fr esophageal stethoscopes, respectively. According to Dixon and Mood method, the 50% effective paratracheal force (confidence interval) was 18.4 (17.5‒19.3) N with the use of a 12-Fr esophageal stethoscope and 12.8 (11.0‒14.6) N with the use of an 18-Fr esophageal stethoscope. Using probit regression analysis, the 50% and 95% effective paratracheal forces were 18.4 (16.8‒19.6) N and 20.6 (19.4‒27.9) N, respectively, with the use of a 12-Fr esophageal stethoscope, and 12.4 (8.3‒14.4) N and 16.9 (14.7‒37.3) N, respectively, with the use of an 18-Fr esophageal stethoscope. Our findings suggest a guide for applying paratracheal force during rapid sequence induction and tracheal intubation.

Research paper thumbnail of {"__content__"=>"Highly sensitive and flexible strain-pressure sensor with cracked paddy shaped MoS/graphene foam/Ecoflex hybrid nanostructures.", "sub"=>{"__content__"=>"2"}}

ACS applied materials & interfaces, Jan 27, 2018

Three-dimensional graphene porous networks (GPNs) have received considerable attention as a nano-... more Three-dimensional graphene porous networks (GPNs) have received considerable attention as a nano-material for wearable touch sensor applications due to their outstanding electrical conductivity and mechanical stability. Herein, we demonstrate a strain-pressure sensor with high sensitivity and durability by combining molybdenum disulfide (MoS2) and Ecoflex with a GPN. The planar sheets of MoS2 bonded to the GPN were conformally arranged with a crack-paddy shape, and the MoS2 nano-flakes were formed on the planar sheet. The size and density of the MoS2 nano-flakes was gradually increased by raising the concentration of (NH4)2MoS4. We found that this conformal nanostructure of MoS2 on the GPN surface can produce improved the resistance variation against external strain and pressure. Consequently, our MoS2/GPN/Ecoflex sensor exhibited noticeably improved sensitivity compared to previously reported GPN/PDMS sensors in a pressure test due to the existence of the conformal planar sheet of ...

Research paper thumbnail of Gamma‐Ray Tolerant Flexible Pressure–Temperature Sensor for Nuclear Radiation Environment

Advanced Materials Technologies, 2021

Research paper thumbnail of Bandgap Tuned WS 2 Thin‐Film Photodetector by Strain Gradient in van der Waals Effective Homojunctions

Advanced Optical Materials

Research paper thumbnail of Honeycomb-like MoS2 Nanotube Array-Based Wearable Sensors for Noninvasive Detection of Human Skin Moisture

Research paper thumbnail of Highly Sensitive and Fast Responsive Humidity Sensor based on 2D PtSe 2 with Gamma Radiation Tolerance

Advanced Materials Technologies

Research paper thumbnail of High Durability and Waterproofing rGO/SWCNT-Fabric-Based Multifunctional Sensors for Human-Motion Detection

ACS applied materials & interfaces, Jan 31, 2018

Wearable strain-pressure sensors for detecting electrical signals generated by human activities a... more Wearable strain-pressure sensors for detecting electrical signals generated by human activities are being widely investigated because of their diverse potential applications, from observing human motion to health monitoring. In this study, we fabricated reduced graphene oxide (rGO)/single-wall carbon nanotube (SWCNT) hybrid fabric-based strain-pressure sensors using a simple solution process. The structural and chemical properties of the rGO/SWCNT fabrics were characterized using scanning electron microscopy (SEM), Raman, and X-ray photoelectron spectroscopy (XPS). Complex networks containing rGO and SWCNTs were homogeneously formed on the cotton fabric. The sensing performance of the devices was evaluated by measuring the effects of bending strain and pressure. When the CNT content was increased, the change in relative resistance decreased, while durability was significantly improved. The rGO/SWCNT (0.04 wt %) fabric sensor showed particularly high mechanical stability and flexibil...

Research paper thumbnail of A Research on New-Concept Graphene Devices with Atom-Level Property Controls

ETRI Project Report, 2017

Research paper thumbnail of Tailoring 2D Materials by Structural Engineering for Flexible Pressure-Temperature and Humidity Sensing Devices

Research paper thumbnail of Development of Basic Technologies for 3D Photo-Electronics

Research paper thumbnail of Mutifunctional EMI Shielding and Sensing Applications based on Low-dimensional Nanomaterials

Research paper thumbnail of Assessment of the 50 % and 95 % effective paratracheal forces for occluding the esophagus in anesthetized patients

Journal of Clinical Monitoring and Computing, 2021

This study aimed to evaluate the 50% and 95% effective paratracheal forces for occluding the esop... more This study aimed to evaluate the 50% and 95% effective paratracheal forces for occluding the esophagus in anesthetized patients. In 46 anesthetized patients, the upper esophagus was examined using ultrasonography, and the lower paratracheal area over the esophagus just above the clavicle was marked. Manual paratracheal force was applied over that area using a novel pressure sensing device set-up. In the first patient, a 20 N paratracheal force was applied, and the patency of the esophagus was assessed by advancing the esophageal stethoscope. Unsuccessful advancement of the esophageal stethoscope was considered an effective paratracheal force. If advancement of the esophageal stethoscope was successful, the paratracheal force was increased by 2 N for the next patient, and if it was unsuccessful, the force was decreased by 2 N for the next patient. These sequential tests were performed using 12- and 18-Fr esophageal stethoscopes, respectively. According to Dixon and Mood method, the 50% effective paratracheal force (confidence interval) was 18.4 (17.5‒19.3) N with the use of a 12-Fr esophageal stethoscope and 12.8 (11.0‒14.6) N with the use of an 18-Fr esophageal stethoscope. Using probit regression analysis, the 50% and 95% effective paratracheal forces were 18.4 (16.8‒19.6) N and 20.6 (19.4‒27.9) N, respectively, with the use of a 12-Fr esophageal stethoscope, and 12.4 (8.3‒14.4) N and 16.9 (14.7‒37.3) N, respectively, with the use of an 18-Fr esophageal stethoscope. Our findings suggest a guide for applying paratracheal force during rapid sequence induction and tracheal intubation.

Research paper thumbnail of {"__content__"=>"Highly sensitive and flexible strain-pressure sensor with cracked paddy shaped MoS/graphene foam/Ecoflex hybrid nanostructures.", "sub"=>{"__content__"=>"2"}}

ACS applied materials & interfaces, Jan 27, 2018

Three-dimensional graphene porous networks (GPNs) have received considerable attention as a nano-... more Three-dimensional graphene porous networks (GPNs) have received considerable attention as a nano-material for wearable touch sensor applications due to their outstanding electrical conductivity and mechanical stability. Herein, we demonstrate a strain-pressure sensor with high sensitivity and durability by combining molybdenum disulfide (MoS2) and Ecoflex with a GPN. The planar sheets of MoS2 bonded to the GPN were conformally arranged with a crack-paddy shape, and the MoS2 nano-flakes were formed on the planar sheet. The size and density of the MoS2 nano-flakes was gradually increased by raising the concentration of (NH4)2MoS4. We found that this conformal nanostructure of MoS2 on the GPN surface can produce improved the resistance variation against external strain and pressure. Consequently, our MoS2/GPN/Ecoflex sensor exhibited noticeably improved sensitivity compared to previously reported GPN/PDMS sensors in a pressure test due to the existence of the conformal planar sheet of ...

Research paper thumbnail of Gamma‐Ray Tolerant Flexible Pressure–Temperature Sensor for Nuclear Radiation Environment

Advanced Materials Technologies, 2021

Research paper thumbnail of Bandgap Tuned WS 2 Thin‐Film Photodetector by Strain Gradient in van der Waals Effective Homojunctions

Advanced Optical Materials

Research paper thumbnail of Honeycomb-like MoS2 Nanotube Array-Based Wearable Sensors for Noninvasive Detection of Human Skin Moisture

Research paper thumbnail of Highly Sensitive and Fast Responsive Humidity Sensor based on 2D PtSe 2 with Gamma Radiation Tolerance

Advanced Materials Technologies

Research paper thumbnail of High Durability and Waterproofing rGO/SWCNT-Fabric-Based Multifunctional Sensors for Human-Motion Detection

ACS applied materials & interfaces, Jan 31, 2018

Wearable strain-pressure sensors for detecting electrical signals generated by human activities a... more Wearable strain-pressure sensors for detecting electrical signals generated by human activities are being widely investigated because of their diverse potential applications, from observing human motion to health monitoring. In this study, we fabricated reduced graphene oxide (rGO)/single-wall carbon nanotube (SWCNT) hybrid fabric-based strain-pressure sensors using a simple solution process. The structural and chemical properties of the rGO/SWCNT fabrics were characterized using scanning electron microscopy (SEM), Raman, and X-ray photoelectron spectroscopy (XPS). Complex networks containing rGO and SWCNTs were homogeneously formed on the cotton fabric. The sensing performance of the devices was evaluated by measuring the effects of bending strain and pressure. When the CNT content was increased, the change in relative resistance decreased, while durability was significantly improved. The rGO/SWCNT (0.04 wt %) fabric sensor showed particularly high mechanical stability and flexibil...