scholarly journals Facile Synthesis of Sprayed CNTs Layer-Embedded Stretchable Sensors with Controllable Sensitivity

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 311 ◽  
Author(s):  
Hammad R. Khalid ◽  
Iqra Choudhry ◽  
Daeik Jang ◽  
Nadir Abbas ◽  
M. Salman Haider ◽  
...  
Keyword(s):  
Electrical Resistance ◽  
Electronic Devices ◽  
Polymer Layer ◽  
Facile Synthesis ◽  
Optical Images ◽  
Significant Interest ◽  
Potential Applications ◽  
Facile Fabrication ◽  
Stretchable Sensors ◽  
Solution Volume

Flexible electronic devices have gained significant interest due to their different potential applications. Herein, we report highly flexible, stretchable, and sensitive sensors made of sprayed CNT layer, sandwiched between two polymer layers. A facile fabrication process was employed in which the CNT solution was directly sprayed onto a patterned bottom polymer layer, above which a second polymer layer was casted to get a sandwiched composite structure. Varying amounts of CNT solution (i.e., 10, 25, 40, 70, and 100 mL) were sprayed to get conductive CNT layers of different thicknesses/densities. The physical characteristics of the conductive CNT layers were studied through SEM and optical images. The starting electrical resistance values (without strain) as well as the changes in electrical resistance against human body motions were monitored. The synthesized samples exhibited good response against finger and wrist bending. The conductivity of the samples increased with increase of CNT solution volume while the sensitivity followed the inverse relation, suggesting that the sensors with controlled sensitivity could be fabricated for targeted strain ranges using the proposed method.

scholarly journals SnSe Nanosheets: From Facile Synthesis to Applications in Broadband Photodetections

Nanomaterials ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 49
Author(s):  
Xiangyang Li ◽  
Zongpeng Song ◽  
Huancheng Zhao ◽  
Wenfei Zhang ◽  
Zhenhua Sun ◽  
...  
Keyword(s):  
Transient Absorption ◽  
Ultrafast Optics ◽  
Light Response ◽  
Transient Absorption Spectroscopy ◽  
Monolayer Graphene ◽  
Proof Of Concept ◽  
Facile Synthesis ◽  
Femtosecond Transient Absorption ◽  
Potential Applications ◽  
Promising Area

In recent years, using two-dimensional (2D) materials to realize broadband photodetection has become a promising area in optoelectronic devices. Here, we successfully synthesized SnSe nanosheets (NSs) by a facile tip ultra-sonication method in water-ethanol solvent which was eco-friendly. The carrier dynamics of SnSe NSs was systematically investigated via a femtosecond transient absorption spectroscopy in the visible wavelength regime and three decay components were clarified with delay time of τ1 = 0.77 ps, τ2 = 8.3 ps, and τ3 = 316.5 ps, respectively, indicating their potential applications in ultrafast optics and optoelectronics. As a proof-of-concept, the photodetectors, which integrated SnSe NSs with monolayer graphene, show high photoresponsivities and excellent response speeds for different incident lasers. The maximum photo-responsivities for 405, 532, and 785 nm were 1.75 × 104 A/W, 4.63 × 103 A/W, and 1.52 × 103 A/W, respectively. The photoresponse times were ~22.6 ms, 11.6 ms, and 9.7 ms. This behavior was due to the broadband light response of SnSe NSs and fast transportation of photocarriers between the monolayer graphene and SnSe NSs.

Photo-induced negative differential resistance and carrier-transport mechanisms in Bi2FeCrO6 resistive switching memory devices

2021 ◽  
Vol 9 (39) ◽  
pp. 13755-13760
Author(s):  
Songcheng Hu ◽  
Zhenhua Tang ◽  
Li Zhang ◽  
Dijie Yao ◽  
Zhigang Liu ◽  
...  
Keyword(s):  
Resistive Switching ◽  
Negative Differential Resistance ◽  
Carrier Transport ◽  
Electronic Devices ◽  
Differential Resistance ◽  
Memory Devices ◽  
Transport Mechanisms ◽  
Resistive Switching Memory ◽  
Potential Applications ◽  
Switching Memory

The new effects induced by light in materials have important potential applications in optoelectronic multifunctional electronic devices.

Structure and Electrical Properties of an Assembly of Au Nanoclusters

2001 ◽  
Vol 635 ◽  
Author(s):  
G. Muralidharan ◽  
L. Maya ◽  
T. Thundat
Keyword(s):  
Threshold Voltage ◽  
Specific Reference ◽  
Low Molecular Weight ◽  
Electrical Measurements ◽  
Monolayer Films ◽  
Au Nanoclusters ◽  
Fundamental Physics ◽  
Au Clusters ◽  
Significant Interest ◽  
Potential Applications

AbstractConduction through an assembly of nanosized clusters coupled by tunneling barriers is of significant interest both for understanding the fundamental physics involved and for potential applications. In this study, we describe a technique for preparing relatively large (dimensions of a few 100 µm to a few mm in size) monolayer films consisting of 3 nm diameter Au clusters coated with mercaptododecanoic acid, using low molecular weight-polymers as coupling agents. Electrical measurements of the assembly show non-linear characteristics. Below a certain threshold voltage, the current does not vary with an increase in voltage. Above this threshold voltage, current increases with voltage and can be described by a power-law relationship with an exponent close to unity. These characteristics of the I-V curve are discussed with specific reference to theoretical studies on conduction through an array of capacitance-coupled metallic islands and previous experimental results in similar systems.

Cancer theranosis using mono-disperse, mesoporous gold nanoparticles obtained via a robust, high-yield synthetic methodology

RSC Advances ◽  
2016 ◽  
Vol 6 (16) ◽  
pp. 13554-13561 ◽  
Author(s):  
Taeksu Lee ◽  
Doyeon Bang ◽  
Yong Wook Chang ◽  
Yuna Choi ◽  
Kwang Yeol Park ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
High Yield ◽  
Synthetic Methodology ◽  
Facile Synthesis ◽  
Potential Applications

Here, we introduce the facile synthesis of scalable, mono-disperse, mesoporous gold nanoparticles (MPGNs) with an acidic emulsification method, which exhibit many attractive nanoplasmonic features for potential applications in many fields.

Electrical Resistive Spiking of Fungi

2021 ◽  
pp. 1-7 ◽  
Author(s):  
Andrew Adamatzky ◽  
Alessandro Chiolerio ◽  
Georgios Sirakoulis
Keyword(s):  
Electrical Resistance ◽  
Electronic Devices ◽  
Low Frequency ◽  
High Amplitude ◽  
Average Amplitude ◽  
Average Width ◽  
C 23 ◽  
C 30 ◽  
Low Amplitude

We study long-term electrical resistance dynamics in mycelium and fruit bodies of oyster fungi P. ostreatus. A nearly homogeneous sheet of mycelium on the surface of a growth substrate exhibits trains of resistance spikes. The average width of spikes is c. 23[Formula: see text]min and the average amplitude is c. 1[Formula: see text]k[Formula: see text]. The distance between neighboring spikes in a train of spikes is c. 30[Formula: see text]min. Typically, there are 4–6 spikes in a train of spikes. Two types of electrical resistance spikes trains are found in fruit bodies: low frequency and high amplitude (28[Formula: see text]min spike width, 1.6[Formula: see text]k[Formula: see text] amplitude, 57[Formula: see text]min distance between spikes) and high frequency and low amplitude (10[Formula: see text]min width, 0.6[Formula: see text]k[Formula: see text] amplitude, 44[Formula: see text]min distance between spikes). The findings could be applied in monitoring of physiological states of fungi and future development of living electronic devices and sensors.

Fluctuation Microscopy Studies of Amorphous Diamond-Like Carbon Films

2000 ◽  
Vol 6 (S2) ◽  
pp. 432-433
Author(s):  
X. Chen ◽  
J. M. Gibson ◽  
J. Sullivan
Keyword(s):  
Electronic Devices ◽  
High Hardness ◽  
Carbon Films ◽  
Optical Coatings ◽  
Diamond Like Carbon ◽  
Electron Loss ◽  
Negative Electron Affinity ◽  
Chemical Inertness ◽  
Potential Applications ◽  
Key Questions

Hydrogen-free amorphous diamond-like carbon films have stimulated great interest because of their useful properties, such as high hardness, chemical inertness, thermal stability, wide optical gap, and negative electron affinity[l]. Consequently, they may have various potential applications in mechanical and optical coatings, MEMS systems, chemical sensors and electronic devices. Amorphous diamond-like carbon films often contains significant amounts of four-fold or sp3 bonded carbon, in contrast to amorphous carbon films prepared by evaporation or sputtering which consist mostly of three-fold or sp2 bonded carbon. The ratio and the structure configurations of these three-fold and four-fold carbon atoms certainly decide the properties of these amorphous diamond-carbon films. Although the ratio of three-fold and four-fold carbon has been studied with Raman spectroscopy and electron-loss-energy spectroscopy, very little has been understood regarding key questions such as how the three-fold and the four-fold carbon atoms are integrated in the film, and what structures those three-fold carbon atoms take.

scholarly journals Electrical, Structural, Optical, and Adhesive Characteristics of Aluminum-Doped Tin Oxide Thin Films for Transparent Flexible Thin-Film Transistor Applications

Materials ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 137 ◽  
Author(s):  
Seung-Hun Lee ◽  
Kihwan Kwon ◽  
Kwanoh Kim ◽  
Jae Sung Yoon ◽  
Doo-Sun Choi ◽  
...  
Keyword(s):  
Thin Film ◽  
Tin Oxide ◽  
Thin Film Transistors ◽  
Thin Film Transistor ◽  
Electronic Devices ◽  
Optical Transmittance ◽  
Plastic Substrate ◽  
Current Ratio ◽  
Vacancy Defects ◽  
Potential Applications

The properties of Al-doped SnOx films deposited via reactive co-sputtering were examined in terms of their potential applications for the fabrication of transparent and flexible electronic devices. Al 2.2-atom %-doped SnOx thin-film transistors (TFTs) exhibit improved semiconductor characteristics compared to non-doped films, with a lower sub-threshold swing of ~0.68 Vdec−1, increased on/off current ratio of ~8 × 107, threshold voltage (Vth) near 0 V, and markedly reduced (by 81%) Vth instability in air, attributable to the decrease in oxygen vacancy defects induced by the strong oxidizing potential of Al. Al-doped SnOx films maintain amorphous crystallinity, an optical transmittance of ~97%, and an adhesive strength (to a plastic substrate) of over 0.7 kgf/mm; such films are thus promising semiconductor candidates for fabrication of transparent flexible TFTs.

A Novel Solution of Monitoring Incontinence Status by Conductive Yarn and Advanced Seamless Knitting Techniques

2012 ◽  
Vol 7 (4) ◽  
pp. 155892501200700 ◽  
Author(s):  
Rong Liu ◽  
Shuxiao Wang ◽  
Terence T. Lao
Keyword(s):  
Care Provider ◽  
Electrical Resistance ◽  
Conductive Yarns ◽  
Wet Processing ◽  
Potential Applications ◽  
Stable Performance ◽  
Seamless Knitting ◽  
Intelligent Healthcare ◽  
Conductive Yarn ◽  
Product Dimension

This paper presents a novel solution for monitoring incontinence status through the design and development of the intelligent incontinence pants by the use of conductive yarns and incorporating advanced circular seamless knitting technology. The produced textile incorporates wire and electrodes by conductive yarn working with a siren system which can monitor, sense and alert the wearer and care provider on the incontinence status in real time so as to reduce the need for manual checking and minimize patient care workload. The engineered stitches, yarn materials, and unique seamless knitting techniques provide soft handling, special fabric mechanisms, and tactile comfort of the resulting product. The electrical resistance of knitted conductive yarn demonstrated a stable performance in wet processing. Fitting body trials were conducted to estimate product dimension and configuration. This study allows us to explore further the potential applications of conductive yarn and seamless knitting technology in bio-functional and intelligent healthcare products and solutions through integrating multidisciplinary knowledge and techniques.

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