scholarly journals A Composite Microfiber for Biodegradable Stretchable Electronics

Micromachines ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 1036
Author(s):  
Adeela Hanif ◽  
Gargi Ghosh ◽  
Montri Meeseepong ◽  
Hamna Haq Chouhdry ◽  
Atanu Bag ◽  
...  
Keyword(s):  
Au Nanoparticles ◽  
Electronic Devices ◽  
Strain Sensor ◽  
High Strength ◽  
Implantable Devices ◽  
Stretchable Electronics ◽  
Current Response ◽  
Environmental Footprint ◽  
Device Applications ◽  
Stable Current

Biodegradable stretchable electronics have demonstrated great potential for future applications in stretchable electronics and can be resorbed, dissolved, and disintegrated in the environment. Most biodegradable electronic devices have used flexible biodegradable materials, which have limited conformality in wearable and implantable devices. Here, we report a biodegradable, biocompatible, and stretchable composite microfiber of poly(glycerol sebacate) (PGS) and polyvinyl alcohol (PVA) for transient stretchable device applications. Compositing high-strength PVA with stretchable and biodegradable PGS with poor processability, formability, and mechanical strength overcomes the limits of pure PGS. As an application, the stretchable microfiber-based strain sensor developed by the incorporation of Au nanoparticles (AuNPs) into a composite microfiber showed stable current response under cyclic and dynamic stretching at 30% strain. The sensor also showed the ability to monitor the strain produced by tapping, bending, and stretching of the finger, knee, and esophagus. The biodegradable and stretchable composite materials of PGS with additive PVA have great potential for use in transient and environmentally friendly stretchable electronics with reduced environmental footprint.

scholarly journals Highly stretchable large area woven, knitted and robust braided textile based interconnection for stretchable electronics

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Min Ju Yun ◽  
Yeon Hyang Sim ◽  
Dong Yoon Lee ◽  
Seung I. Cha
Keyword(s):  
High Performance ◽  
Liquid Metals ◽  
Rapid Development ◽  
Electronic Devices ◽  
High Strength ◽  
Stretchable Electronics ◽  
Large Area ◽  
Wearable Technologies ◽  
Highly Stretchable ◽  
Commercial Applications

AbstractWith the rapid development of stretchable and wearable technologies, stretchable interconnection technology also demanded along it. Stretchable interconnections should have high stretchability and stable conductivity for use as an electrode. In addition, to develop to commercialization scale from research scale, a simple fabrication process that can be scaled up, and the stretchable interconnection should be able to be electrically connected to devices or modules directly. To date, printable conductor inks, liquid metals and stretchable structured interconnections have been reported for stretchable interconnections. These approaches have demonstrated high stretchability and conductivity, but in aspect of scale, it is appropriate to apply in micro-scale devices. For requirements of stretchability, conductivity and direct integration into meso- or centimeter-scale electronic devices or modules, here we introduce stretchable interconnections with a textile structure composed of metal fibers. The stretchable woven and knitted textiles show 67% strain and stable conductivity, and the cylindrical textile shows more than 700% strain with high strength. The stretchable textiles were fabricated using a weaving, knitting and braiding machine that can be used to produce textiles without any limit to length or area. These textiles exhibit high and stable conductivity even under deformation, and can be directly integrated into devices or modules by soldering. These high-performance stretchable textiles have great potential for commercial applications.

Abstract 15829: Temporal Characteristics of Intra-thoracic Impedance Before and After Heart Failure Hospitalizations in a Large Real-world Population of Patients With Cardiovascular Implanted Electronic Devices

Circulation ◽  
2020 ◽  
Vol 142 (Suppl_3) ◽  
Author(s):  
Shantanu Sarkar ◽  
Jodi L Koehler ◽  
Eddy Warman
Keyword(s):  
Real World ◽  
Electronic Devices ◽  
Primary Diagnosis ◽  
Implantable Devices ◽  
World Population ◽  
Inclusion Criteria ◽  
Temporal Characteristics ◽  
Before And After ◽  
Intrathoracic Impedance

Introduction: Intrathoracic impedance (IMP), measured in ICD/CRTD implantable devices, is a measure of intravascular blood volume and have been shown to correlate with intracardiac pressures. We investigated the temporal characteristics of IMP before and after HF events (HFE) in a large real-world cohort of patients (pts) with ICD/CRTD devices. Methods: We linked Optum© deidentified EHR dataset during the period from 2007-2017 to the Medtronic CareLink data warehouse. Pts with ICD/CRTD implants with IMP measurements were included. HFE was defined as an inpatient, ED, or observation unit stay with primary diagnosis of HF and IV diuretics administration. Temporal average of IMP measurement across all pts in the 60 days pre and post HFE were compared for HFE with and without readmission for HF within 60 days and in pts with no HFE. Results: A total of 17,886 pts with 1.8±1.2 years of follow-up met inclusion criteria. The average age was 66.6 ±12.3 years, with 72% being males, and 51% with ICD devices. A total of 1174 pts had 1425 HFE with no readmission and 282 pts had 295 HFE which were followed by readmission. A total of 17,839 pts had no HFE over 86,858 follow-up months. The average IMP during HFE, with and without readmission, and in pts with no HFE are shown in Fig. IMP decreases over a period of time prior to HFE and recovers due to treatment during HFE. The average IMP across all patients was lower on all 60 days pre and post HFE with readmission compared to HFE with no readmission (p<0.001) and both were lower compared to follow-up period with no HFE (p<0.001). The IMP recovers less often after HF events which are followed by readmission within 60 days compared to HF events with no readmission. Conclusions: In a large real-world population of pts with ICD/CRTD devices, on an average IMP reduces prior to and recovers during HFE. IMP was lower before and after HFE with readmission compared to HFE with no readmission. Readmission is more likely in pts with smaller impedance recovery after HF events.

A stretchable and self-healable organosilicon conductive nanocomposite for a reliable and sensitive strain sensor

2020 ◽  
Vol 8 (48) ◽  
pp. 17277-17288
Author(s):  
Kaiming Zhang ◽  
Chengxin Song ◽  
Zhe Wang ◽  
Chuanhui Gao ◽  
Yumin Wu ◽  
...  
Keyword(s):  
Human Activity ◽  
Electronic Devices ◽  
Strain Sensor ◽  
Activity Monitoring ◽  
Strain Sensors ◽  
Sensitive Strain ◽  
Soft Robots ◽  
Conductive Nanocomposites

Stretchable conductive nanocomposites can be further used as strain sensors, which are extensively applied in bionic electronic devices, human activity monitoring and soft robots.

TWO-DIMENSIONAL ELECTRONS IN FIELD EFFECT TRANSISTORS

1998 ◽  
Vol 09 (01) ◽  
pp. 65-99 ◽  
Author(s):  
MICHAEL S. SHUR ◽  
MICHEL DYAKONOV
Keyword(s):  
Field Effect Transistors ◽  
Electronic Devices ◽  
Deep Submicron ◽  
Electron Mass ◽  
Two Dimensional ◽  
Silicon Devices ◽  
Plasma Effects ◽  
Device Applications ◽  
Space Dependence ◽  
Large Sheet

In deep submicron silicon MOSFETs, GaAs-based HEMTs, and in new emerging heterostructure systems, such as AlGaN/GaN, electrons forming a two-dimensional (2D) conducting channel exhibit new interesting effects that might find important device applications. Some of these effects are related to the space dependence of the electron mass. Other effects are linked to a large sheet electron concentration, when electrons behave not as a 2D gas but rather as a 2D electron electron fluid. We consider plasma effects in this fluid and discuss plasma wave electronic devices that rely on these effects. We also discuss the properties of 2D electrons in silicon devices, where plasma effects might also play an important role in deep submicron MOSFETs.

Nanoionics and its device applications

2017 ◽  
Author(s):  
T. Hasegawa ◽  
K. Terabe ◽  
T. Sakamoto ◽  
M. Aono
Keyword(s):  
Solid Electrolytes ◽  
Current Flow ◽  
Electrochemical Reaction ◽  
Electronic Devices ◽  
Low Power Consumption ◽  
Ionic Conductors ◽  
Conductive Materials ◽  
Device Applications ◽  
Metal Filament ◽  
Atomic Switch

This article discusses nanoionics phenomena and their applications for making new types of electronic devices. It begins with an overview of ionic conductive materials, which are classified into two categories in terms of the charged particles: solid electrolytes in which only ions contribute to the current flow, and mixed electronic and ionic conductors in which bothelectrons and ions contribute to the current flow. It then describes the solid electrochemical reaction that controls metal-filament growth and shrinkage in an atomic switch, along with the fundamentals of an atomic switch. It also considers new types of atomic switches and several applications of atomic switches. Finally, it highlights some novel characteristics of the atomic switch such as small size, low power consumption, non-volatility, and low on-resistance. These characteristics enable us to improve the performance of present-day electronic devices.

Top-Hole Technology Overcomes Challenging Sand-Based Seabed Conditions and Enables Record Drilling Performance in an Offshore Exploration Well

2021 ◽  
Author(s):  
Camilo Cardenas ◽  
Hans Erik Hansen ◽  
Sigvald Hanssen ◽  
Harald Blikra ◽  
Wolfgang Mathis ◽  
...  
Keyword(s):  
Positive Impact ◽  
Health And Safety ◽  
High Strength ◽  
Cost Comparison ◽  
Environmental Footprint ◽  
Dense Sand ◽  
The North ◽  
Drilling Performance ◽  
Well Design ◽  
Exploration Well

Abstract Top hole construction is a critical part of any well design, especially for subsea wells. It is considered to be the foundation for the well, and it is crucial for ensuring well integrity. Uncertainties and conditions of the seabed and top layers could compromise the stability of the chosen solution. This paper describes the first implementation of the conductor anchor node (CAN®) technology in sand-based conditions and demonstrates its positive impact on the drilling performance for an offshore exploration well in the North Sea. The main challenges identified in the top-hole design for this well were the presence of boulders down to 65 m below the seabed, and hard soil that consisted mainly of very dense sand and high strength sandy-clay layers. Different solutions were evaluated using a risk-based approach, looking to optimize operational performance and decrease the environmental footprint. A technology which consists of a pre-installed short conductor within a CAN was chosen. This solution enabled the operator to establish a competent well foundation above the boulder interval and increase operational efficiency by reducing the critical rig time. However, the CAN technology had not been deployed in this type of soil previously. Thus, the feasibility of its installation became one of the main milestones of the project. This was made possible due to a set of contingencies and modifications that were the result of a strategic collaboration among the parties involved. The CAN was successfully installed by a crane vessel before the rig arrived at location, and the set of contingencies and modifications mentioned in this paper were decisive to ensure it reached the required penetration depth. Furthermore, this paper demonstrates that the CAN technology was crucial for the project to achieve top performance results and become one of the fastest exploration wells drilled in the Norwegian basin. This solution reduced uncertainties related to the conductor cementing, load and fatigue capacities, and deep surface casing cement. Improvement in the drilling performance is determined by estimating the decrease in drilling time, materials and consumables. Those results are then used to perform a cost comparison which demonstrates that the CAN technology reduced the top-hole construction cost significantly on this offshore well. In addition, the reduction in the well environmental footprint is quantified, and its contributions to the projects health and safety goals are highlighted.

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