scholarly journals Flexible piezocapacitive sensors based on wrinkled microstructures: toward low-cost fabrication of pressure sensors over large areas

RSC Advances ◽  
2017 ◽  
Vol 7 (63) ◽  
pp. 39420-39426 ◽  
Author(s):  
Seolhee Baek ◽  
Hayeong Jang ◽  
So Young Kim ◽  
Heejeong Jeong ◽  
Singu Han ◽  
...  
Keyword(s):  
Low Cost ◽  
Pressure Sensors ◽  
Large Area ◽  
Highly Sensitive

Wrinkled elastomeric templates prepared by stretching and releasing are utilized for demonstrating highly sensitive, simple, and low-cost piezocapacitive pressure sensors over large area.

scholarly journals Highly Sensitive Electromechanical Piezoresistive Pressure Sensors Based on Large-Area Layered PtSe2 Films

Nano Letters ◽  
2018 ◽  
Vol 18 (6) ◽  
pp. 3738-3745 ◽  
Author(s):  
Stefan Wagner ◽  
Chanyoung Yim ◽  
Niall McEvoy ◽  
Satender Kataria ◽  
Volkan Yokaribas ◽  
...  
Keyword(s):  
Pressure Sensors ◽  
Large Area ◽  
Highly Sensitive ◽  
Piezoresistive Pressure Sensors

scholarly journals Sensitive capacitive pressure sensors based on graphene membrane arrays

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Makars Šiškins ◽  
Martin Lee ◽  
Dominique Wehenkel ◽  
Richard van Rijn ◽  
Tijmen W. de Jong ◽  
...  
Keyword(s):  
Low Cost ◽  
Pressure Sensors ◽  
Small Diameter ◽  
Circuit Board ◽  
High Temperature Annealing ◽  
Layer Graphene ◽  
Graphene Membrane ◽  
Highly Sensitive ◽  
High Flexibility ◽  
Graphene Membranes

AbstractThe high flexibility, impermeability and strength of graphene membranes are key properties that can enable the next generation of nanomechanical sensors. However, for capacitive pressure sensors, the sensitivity offered by a single suspended graphene membrane is too small to compete with commercial sensors. Here, we realize highly sensitive capacitive pressure sensors consisting of arrays of nearly ten thousand small, freestanding double-layer graphene membranes. We fabricate large arrays of small-diameter membranes using a procedure that maintains the superior material and mechanical properties of graphene, even after high-temperature annealing. These sensors are readout using a low-cost battery-powered circuit board, with a responsivity of up to $$47.8$$ 47.8  aF Pa−1 mm−2, thereby outperforming the commercial sensors.

scholarly journals A Flexible and Highly Sensitive Pressure Sensor Based on AgNWs/NRLF for Hand Motion Monitoring

Nanomaterials ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 945 ◽  
Author(s):  
Yi Sun ◽  
Zhaoqun Du
Keyword(s):  
Silver Nanowires ◽  
Low Cost ◽  
Three Dimensional ◽  
Pressure Sensors ◽  
Natural Rubber Latex ◽  
Dip Coating ◽  
Electrical Signal ◽  
Environmental Friendliness ◽  
Hand Motion ◽  
Highly Sensitive

Flexible, highly sensitive, easy fabricating process, low-cost pressure sensors are the trend for flexible electronic devices. Inspired by the softness, comfortable, environmental friendliness and harmless of natural latex mattress, herein, we report an agile approach of constructing a flexible 3D-architectured conductive network by dip-coating silver nanowires (AgNWs) on the natural rubber latex foam (NRLF) substrate that provide the 3D micro-network structure as the skeleton. The variation of the contact transformed into the electrical signal among the conductive three-dimensional random networks during compressive deformation is the piezoresistive effect of AgNWs/NRLF pressure sensors. The resulting AgNWs/NRLF pressure sensors exhibit desirable electrical conductivity (0.45–0.50 S/m), excellent flexibility (58.57 kPa at 80% strain), good hydrophobicity (~128° at 5th dip-coated times) and outstanding repeatability. The AgNWs/NRLF sensors can be assembled on a glove to detect hand motion sensitively such as bending, touching and holding, show potential application such as artificial skin, human prostheses and health monitoring in multifunctional pressure sensors.

scholarly journals Fabrication of Novel 2D NiO Nanosheet Branched on 1D-ZnO Nanorod Arrays for Gas Sensor Application

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Le Thuy Hoa ◽  
Huynh Ngoc Tien ◽  
Seung Hyun Hur
Keyword(s):  
Carrier Transport ◽  
Gas Adsorption ◽  
Low Cost ◽  
Zno Nanorods ◽  
Hydrothermal Process ◽  
Large Area ◽  
Highly Sensitive ◽  
P Type ◽  
Reducing Gases ◽  
Nio Nanosheets

Fabrication of 3D structures composed of 1D n-type ZnO nanorods (NRs) and 2D p-type NiO nanosheets (NSs) by a low-cost, low-temperature, and large-area scalable hydrothermal process and its use in highly sensitive NO2gas sensors were studied. The p-n heterojunctions formed by NiO-ZnO interfaces as well as large area two-dimensional NiO NSs themselves increased the adsorption of NO2. Moreover, the charge transfer between NiO and ZnO enhanced the responsivity and sensitivity of NO2sensing even at a concentration of 1 ppm. The 30-min NiO NS growth on ZnO NRs in the hybrid sensor showed the highest sensitivity due to the formation of optimum p-n heterojunctions between ZnO NRs and NiO NSs for gas adsorption and carrier transport. Low responsivity toward reducing gases was also observed.

Fabrication of Low-Cost and Highly Sensitive Graphene-Based Pressure Sensors by Direct Laser Scribing Polydimethylsiloxane

2019 ◽  
Vol 11 (6) ◽  
pp. 6195-6200 ◽  
Author(s):  
Yunsong Zhu ◽  
Hongbing Cai ◽  
Huaiyi Ding ◽  
Nan Pan ◽  
Xiaoping Wang
Keyword(s):  
Low Cost ◽  
Pressure Sensors ◽  
Laser Scribing ◽  
Highly Sensitive ◽  
Direct Laser

scholarly journals Large Area and Low-Cost Pressure Sensors based on Flexible Printing Electronics for Applications in Neurorehabilitation Scenarios

2012 ◽  
Vol 47 ◽  
pp. 41-43 ◽  
Author(s):  
J. Herrán ◽  
I. Fernández ◽  
E. Ochoteco ◽  
G. Cabañero ◽  
H. Grande
Keyword(s):  
Low Cost ◽  
Pressure Sensors ◽  
Large Area

Computer simulation study about the dependence of amorphous silicon photonic waveguides efficiency on the material quality

2020 ◽  
Vol 90 (3) ◽  
pp. 30502
Author(s):  
Alessandro Fantoni ◽  
João Costa ◽  
Paulo Lourenço ◽  
Manuela Vieira
Keyword(s):  
Amorphous Silicon ◽  
High Throughput Screening ◽  
Simulation Analysis ◽  
Low Cost ◽  
Deposition Process ◽  
Large Area ◽  
Sidewall Roughness ◽  
Sensing Applications ◽  
Fabrication Defects ◽  
The Impact

Amorphous silicon PECVD photonic integrated devices are promising candidates for low cost sensing applications. This manuscript reports a simulation analysis about the impact on the overall efficiency caused by the lithography imperfections in the deposition process. The tolerance to the fabrication defects of a photonic sensor based on surface plasmonic resonance is analysed. The simulations are performed with FDTD and BPM algorithms. The device is a plasmonic interferometer composed by an a-Si:H waveguide covered by a thin gold layer. The sensing analysis is performed by equally splitting the input light into two arms, allowing the sensor to be calibrated by its reference arm. Two different 1 × 2 power splitter configurations are presented: a directional coupler and a multimode interference splitter. The waveguide sidewall roughness is considered as the major negative effect caused by deposition imperfections. The simulation results show that plasmonic effects can be excited in the interferometric waveguide structure, allowing a sensing device with enough sensitivity to support the functioning of a bio sensor for high throughput screening. In addition, the good tolerance to the waveguide wall roughness, points out the PECVD deposition technique as reliable method for the overall sensor system to be produced in a low-cost system. The large area deposition of photonics structures, allowed by the PECVD method, can be explored to design a multiplexed system for analysis of multiple biomarkers to further increase the tolerance to fabrication defects.

A novel low cost texturization method for large area commercial mono-crystalline silicon solar cells

2006 ◽  
Vol 90 (20) ◽  
pp. 3557-3567 ◽  
Author(s):  
U. Gangopadhyay ◽  
K.H. Kim ◽  
S.K. Dhungel ◽  
U. Manna ◽  
P.K. Basu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Crystalline Silicon ◽  
Low Cost ◽  
Silicon Solar Cells ◽  
Large Area ◽  
Crystalline Silicon Solar Cells

scholarly journals A rapid, accurate, scalable, and portable testing system for COVID-19 diagnosis

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Guanhua Xun ◽  
Stephan Thomas Lane ◽  
Vassily Andrew Petrov ◽  
Brandon Elliott Pepa ◽  
Huimin Zhao
Keyword(s):  
Limit Of Detection ◽  
Low Cost ◽  
High Volume ◽  
N Gene ◽  
Testing System ◽  
Target Sequence ◽  
One Pot ◽  
Sequence Detection ◽  
Highly Sensitive ◽  
Speed Accuracy

AbstractThe need for rapid, accurate, and scalable testing systems for COVID-19 diagnosis is clear and urgent. Here, we report a rapid Scalable and Portable Testing (SPOT) system consisting of a rapid, highly sensitive, and accurate assay and a battery-powered portable device for COVID-19 diagnosis. The SPOT assay comprises a one-pot reverse transcriptase-loop-mediated isothermal amplification (RT-LAMP) followed by PfAgo-based target sequence detection. It is capable of detecting the N gene and E gene in a multiplexed reaction with the limit of detection (LoD) of 0.44 copies/μL and 1.09 copies/μL, respectively, in SARS-CoV-2 virus-spiked saliva samples within 30 min. Moreover, the SPOT system is used to analyze 104 clinical saliva samples and identified 28/30 (93.3% sensitivity) SARS-CoV-2 positive samples (100% sensitivity if LoD is considered) and 73/74 (98.6% specificity) SARS-CoV-2 negative samples. This combination of speed, accuracy, sensitivity, and portability will enable high-volume, low-cost access to areas in need of urgent COVID-19 testing capabilities.

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