Flexible Sensors for Biomedical Application

Gupta, Ankur; Pal, Pramod

doi:10.1007/978-981-10-7751-7_13

Cited by 9 publications

(11 citation statements)

References 40 publications

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“…The rapid progress in the field of miniaturization and integration of portable devices, such as micro/nano-generators [1], micro/nano-actuators, flexible sensors [2], microfluidics devices [3], [4] etc., leads to increase in the heat dissipation issues [5], [6]. Polymer materials have the ability to be used in such fields because of their outstanding versatility and ease of fabrication along with the excellent overall efficiency, good biocompatibility, inertness to various chemicals, thermal stability, adhesion capacity towards other materials.…”

Section: Introductionmentioning

confidence: 99%

Enhanced thermal and mechanical properties of hydrophobic graphite-embedded polydimethylsiloxane composite

et al. 2021

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This work reports the facile fabrication of graphite embedded polydimethylsiloxane (PDMS) composites using in-situ polymerization and investigates the impact of graphite fillers on their mechanical and thermal characteristics. The extensive characterization is performed using scanning electron microscopy (SEM), contact angle measurement system, thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). The mechanical properties of the prepared composites are investigated by compression test which explores the possibility of manipulating the PDMS properties by unswervingly modifying the concentration of conductive graphite filler which improves filler dispersion in the PDMS and increases its interaction with graphite fillers, thereby enhancing the mechanical and thermal characteristics of the manufactured composites. The current study confirms the hydrophobicity (contact angle ~112°) of the fabricated composites and investigates the impact of graphite concentrations ranging from 2.5%-20% on the mechanical properties of pure PDMS polymer during compression testing. Furthermore, the thermal conductivity, thermal diffusivity, and specific heat of graphite-embedded PDMS were around 82%, 505% and 1040% higher than that of the pure PDMS, respectively, while the mechanical properties for the compressive module ranged from 3.2 MPa to 4.9 MPa with the elastic behavior up to 40% strain.

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Section: Introductionmentioning

confidence: 99%

Enhanced thermal and mechanical properties of hydrophobic graphite-embedded polydimethylsiloxane composite

et al. 2021

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“…These sensors can be wearable, self-powering, self-healing, and self-sensing depending upon the materials used and the sensing mechanism involved . For biomedical applications, flexible sensors are generally noninvasive, and the infection or its corresponding signals can be detected by analyzing the composition, insufficiency, or profusion of certain components in the subject under consideration like skin, blood and blood pressure, saliva, urine, tears, neural activity, and several other things. − Flexible sensors possess great potential for health monitoring systems by early diagnosis of different health concerns such as heart failure, stroke, cardiovascular disease, and hypertension. The significant properties of flexible sensors like biocompatibility, softness, transparency, light weight, cost-effectiveness, and easy processability, along with their multipurpose sensing systems, are thus transforming and reconstructing the sensor field as well as the advancements in healthcare. − Several review papers presenting different outlooks of wearable and flexible sensors for health monitoring and biomedical applications have been published in the past few years. ,− However, there is no review article available that solely discusses the role of flexible sensors for a particular healthcare application such as cardiovascular monitoring and surveillance.…”

Section: Flexible Pressure Sensorsmentioning

confidence: 99%

Functionality of Flexible Pressure Sensors in Cardiovascular Health Monitoring: A Review

Mishra

Mohanty

2022

ACS Sens.

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As the highest percentage of global mortality is caused by several cardiovascular diseases (CVD), maintenance and monitoring of a healthy cardiovascular condition have become the primary concern of each and every individual. Simultaneously, recent progress and advances in wearable pressure sensor technology have provided many pathways to monitor and detect underlying cardiovascular illness in terms of irregularities in heart rate, blood pressure, and blood oxygen saturation. These pressure sensors can be comfortably attached onto human skin or can be implanted on the surface of vascular grafts for uninterrupted monitoring of arterial blood pressure. While the traditional monitoring systems are timeconsuming, expensive, and not user-friendly, flexible sensor technology has emerged as a promising and dynamic practice to collect important health information at a comparatively low cost in a reliable and user-friendly way. This Review explores the importance and necessity of cardiovascular health monitoring while emphasizing the role of flexible pressure sensors in monitoring patients' health conditions to avoid adverse effects. A comprehensive discussion on the current research progress along with the real-time impact and accessibility of pressure sensors developed for cardiovascular health monitoring applications has been provided.

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“…From a few decades, researchers have explored various kinds of substrate materials for the fabrication of MEMS device namely, silicon (Si)/ polysilicon, silicon oxide (SiOx), glass & quartz substrate, silicon on insulator [70], silicon carbide (SiC) [71], diamond, shape memory alloys, GaAs and other group III & IV compound semiconductors. Some flexible substrate materials for the application of Bio-sensors and Bio-MEMS can be categorized into polymer, polyamide and paper based substrate, PET and PEN based plastic substrate, PDMS, polycarbonate and many more [72]. Single-crystalline material shows high level intrinsic Q-factors which enable its excellent resonating properties such as higher resolution, better accuracy and high repeatability.…”

Section: Materials Selectionmentioning

confidence: 99%

Si-based MEMS resonant sensor: A review from microfabrication perspective

Verma

Mondal

Gupta

2021

Microelectronics Journal

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With the technological advancement in micro-electro-mechanical systems (MEMS), microfabrication processes along with digital electronics together have opened novel avenues to the development of small-scale smart sensing devices capable of improved sensitivity with a lower cost of fabrication and relatively small power consumption. This article aims to provide the overview of the recent work carried out on the fabrication methodologies adopted to develop silicon based resonant sensors. A detailed discussion has been carried out to understand critical steps involved in the fabrication of the silicon-based MEMS resonator. Some challenges starting from the materials selection to the final phase of obtaining a compact MEMS resonator device for its fabrication have also been explored critically.

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Flexible Sensors for Biomedical Application

Cited by 9 publications

References 40 publications

Enhanced thermal and mechanical properties of hydrophobic graphite-embedded polydimethylsiloxane composite

Enhanced thermal and mechanical properties of hydrophobic graphite-embedded polydimethylsiloxane composite

Functionality of Flexible Pressure Sensors in Cardiovascular Health Monitoring: A Review

Si-based MEMS resonant sensor: A review from microfabrication perspective

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