Read by QxMD icon Read

Flexible sensor

Yuzhong Li, Wenming Tang, Guixiong Liu
Compared to the conventional ultrasonic phased-array system, a large-element phased-array system employing the total focusing method (TFM) can yield improved image resolution and accuracy, providing more flexible scanning methods and image merging functionality. In order to meet various forms of ultrasonic multi-group scanning, an architecture for multi-group scan integration called the "asynchronous distributed ultrasonic TFM system" is proposed, and a novel scheduling algorithm called "the sum of start time and processing time adjacent (SSPA) algorithm" is presented...
2019: PloS One
Yi-Jie Tsai, Chang-Ming Wang, Ta-Sheng Chang, Sanjeeb Sutradhar, Che-Wei Chang, Chong-You Chen, Chia-Han Hsieh, Wei-Ssu Liao
Flexible pressure sensors have attracted increasing interest due to their potential application on wearable sensing devices for human-machine interface connections, but challenges regarding material cost, fabrication robustness, signal transduction, sensitivity improvement, detection range, and operation convenience still need to be overcome. Herein, with a simple, low-cost, and scalable approach, a flexible and wearable pressure sensing device fabricated by utilizing filter paper as solid support, poly(3,4-ethylenedioxythiophene) (PEDOT) to enhance conductivity, and silver nanoparticles (Ag NPs) to provide a rougher surface, is introduced...
February 14, 2019: ACS Applied Materials & Interfaces
Seiichi Takamatsu, Shintaro Goto, Michitaka Yamamoto, Takahiro Yamashita, Takeshi Kobayashi, Toshihiro Itoh
We developed a plastic-scale-model assembly of an ultrathin film piezoresistive microelectromechanical systems (MEMS) strain sensor with a conventional vacuum-suction chip mounter for the application to flexible and wearable strain sensors. A plastic-scale-model MEMS chip consists of 5-μm ultrathin piezoresistive strain sensor film, ultrathin disconnection parts, and a thick outer frame. The chip mounter applies pressure to the ultrathin piezoresistive strain sensor film and cuts the disconnection parts to separate the sensor film from the outer frame...
February 13, 2019: Scientific Reports
Jiale Jiang, Hengbiao Zheng, Xusheng Ji, Tao Cheng, Yongchao Tian, Yan Zhu, Weixing Cao, Reza Ehsani, Xia Yao
Unmanned aerial vehicle (UAV)-based multispectral sensors have great potential in crop monitoring due to their high flexibility, high spatial resolution, and ease of operation. Image preprocessing, however, is a prerequisite to make full use of the acquired high-quality data in practical applications. Most crop monitoring studies have focused on specific procedures or applications, and there has been little attempt to examine the accuracy of the data preprocessing steps. This study focuses on the preprocessing process of a six-band multispectral camera (Mini-MCA6) mounted on UAVs...
February 12, 2019: Sensors
Fang Li, Huifen Peng, Dan Xia, Jinzheng Yang, Kai Yang, Fuxing Yin, Wenjing Yuan
Highly sensitive, selective and room-temperature-performed gas sensors are always the pursuit in the sensing field for practical applications. However, the existing gas sensors can seldom satisfy the aforementioned requirements. Here, we integrate zero-dimensional Ag nanoparticles (AgNP), one-dimensional polymer fibers and two-dimensional aminoanthroquinone functioned reduced graphene oxide (AQRGO) sheets into a three-dimensional sensing scaffold (AgNP-3D-AQRGO) for high performance NO2 sensing. The AQ moieties and AgNP are decorated onto the RGO sheets through a wet chemical route...
February 13, 2019: ACS Applied Materials & Interfaces
Sungwoo Chun, Wonkyeong Son, Gwangyeob Lee, Shi Hyeong Kim, Jong Woo Park, Seon Jeong Kim, Changhyun Pang, Changsoon Choi
Applications in the field of portable and wearable electronics are becoming multifunctional, and the achievement of transparent electronics extensively expands the applications into devices such as wearable flexible displays or skin-attachable mobile computers. Moreover, the self-charging power system (SCPS) is the core technique for realizing portable and wearable electronics. Here, we propose a transparent and flexible multifunctional electronic system in which both an all-in-one SCPS and a touch sensor are combined...
February 13, 2019: ACS Applied Materials & Interfaces
Jia Zhu, Jake J Fox, Ning Yi, Huanyu Cheng
Wireless technology plays a critical role in the development of flexible and stretchable electronics due to the increasing demand for compactness, portability, and level of comfort. As an important candidate in wireless technology, microstrip antennas have recently been explored for flexible and stretchable electronics. However, the stretchable characteristics of the microstrip antenna typically come at a cost of reduced electrical conductivity and radiation efficiency. By utilizing a soft silicone substrate and the structural design of the conventional metallic materials for both patch and ground plane in the microstrip antennas, we have demonstrated two designs of stretchable microstrip antennas: "meshed microstrip antenna" and "arched microstrip antenna"...
February 13, 2019: ACS Applied Materials & Interfaces
Yen-Wei Jhou, Chun-Kai Yang, Siang-Yu Sie, Hsiang-Chih Chiu, Jyh-Shen Tsay
Investigations exploring the inherent mechanical properties of electronic materials have grown rapidly in recent years largely because they are important in developing flexible electronics, organic displays and sensors. However, our understanding of the mechanical properties of organic semiconductors with a thin-film form remains limited. We report herein on an investigation of the structures and related elastic moduli perpendicular to the surface of a rubrene thin film. A rubrene/Si(100) film typically has a cluster-type morphology mainly comprising crystalline nanodomains within the film...
February 13, 2019: Physical Chemistry Chemical Physics: PCCP
Nongnoot Wongkaew, Marcel Simsek, Palaniappan Arumugam, Arne Behrent, Sheela Berchmans, Antje J Baeumner
3D-porous carbon nanomaterials and their hybrids are ideal materials for energy storage and conversion, biomedical research, and wearable sensors, yet today's fabrication methods are too complicated and inefficient to implement into miniaturized systems. Instead, it is shown here that 3D-carbon nanofibrous electrodes of various designs, shapes and sizes, on flexible substrates, under ambient conditions and without complicated equipment and procedures can simply be "written" via a one-step laser-induced carbonization on electrospun nanofibers...
February 11, 2019: Nanoscale
Fereshteh Chekin, Vladyslav Myshin, Ran Ye, Sorin Melinte, Santosh K Singh, Sreekumar Kurungot, Rabah Boukherroub, Sabine Szunerits
Doxorubicin (DOX), an anthracycline molecule, is currently one of the most widely used anticancer drugs in clinics. Systematic treatment of patients with DOX is known to be accompanied by several unpleasant side effects due to the toxicity of the drug. Thus, monitoring of DOX concentration in serum samples has become increasingly important to avoid side effects and ensure therapeutic efficiency. In this study, we discuss the construction of a disposable electrochemical sensor for the direct monitoring of DOX in clinical blood samples...
February 9, 2019: Analytical and Bioanalytical Chemistry
Pedro J Rivero, Javier Goicoechea, Francisco J Arregui
The ability to tune the composition of nanostructured thin films is a hot topic for the design of functional coatings with advanced properties for sensing applications. The control of the structure at the nanoscale level enables an improvement of intrinsic properties (optical, chemical or physical) in comparison with the traditional bulk materials. In this sense, among all the known nanofabrication techniques, the layer-by-layer (LbL) nano-assembly method is a flexible, easily-scalable and versatile approach which makes possible precise control of the coating thickness, composition and structure...
February 7, 2019: Sensors
Edoardo Giusto, Filippo Gandino, Michele Luigi Greco, Michelangelo Grosso, Bartolomeo Montrucchio, Salvatore Rinaudo
Indoor thermal monitoring is a crucial requirement for home automation, which fits inside the ever-growing Internet of Things (IoT) paradigm. The IoT ecosystem aims at connecting every device exploiting specific functions, deployed in a particular place, in order to give the chance to the users to monitor and/or control some aspects of their life, or to demand this task to a proper software. In the thermal monitoring context, IoT provides new opportunities for a dense and/or large-scale distribution of sensors, which have to gather data in order to effectively control the Heating, Ventilation and Air Conditioning (HVAC) system...
February 6, 2019: Sensors
Roisin McMackin, Stefan Dukic, Michael Broderick, Parameswaran M Iyer, Marta Pinto-Grau, Kieran Mohr, Rangariroyashe Chipika, Amina Coffey, Teresa Buxo, Christina Schuster, Brighid Gavin, Mark Heverin, Peter Bede, Niall Pender, Edmund C Lalor, Muthuraman Muthuraman, Orla Hardiman, Bahman Nasseroleslami
OBJECTIVE: To localise and characterise changes in cognitive networks in Amyotrophic Lateral Sclerosis (ALS) using source analysis of mismatch negativity (MMN) waveforms. RATIONALE: The MMN waveform has an increased average delay in ALS. MMN has been attributed to change detection and involuntary attention switching. This therefore indicates pathological impairment of the neural network components which generate these functions. Source localisation can mitigate the poor spatial resolution of sensor-level EEG analysis by associating the sensor-level signals to the contributing brain sources...
February 2, 2019: NeuroImage: Clinical
Jung Han Kim, Tae-Jun Ko, Emmanuel Okogbue, Sang Sub Han, Mashiyat Sumaiya Shawkat, Md Golam Kaium, Kyu Hwan Oh, Hee-Suk Chung, Yeonwoong Jung
Two-dimensional (2D) transition metal dichalcogenide (2D TMD) layers present an unusually ideal combination of excellent opto-electrical properties and mechanical tolerance projecting high promise for a wide range of emerging applications, particularly in flexible and stretchable devices. The prerequisite for realizing such opportunities is to reliably integrate large-area 2D TMDs of well-defined dimensions on mechanically pliable materials with targeted functionalities by transferring them from rigid growth substrates...
February 7, 2019: Scientific Reports
Zhijian Li, Xiaohan Yang, Wei Li, Hanbin Liu
Cellulose paper derived from plants has served as a carrier of cultural inheritance since it was invented 2000 years ago. It attracted more and more attentions in recent years working as a versatile platform to develop functional materials because of its good flexibility, sustainability, biodegradability, low cost and great capability to be modified. Once be functionalized, such as modified with stimuli-responsive polymers, small molecules or inorganic particles, papers may be sensitive to external stimuli from environments and consequently find applications in wide ranges including protein separation, controlled drug release, switchable surfaces, sensoring devices and smart substrates with various colors, etc...
April 15, 2019: Carbohydrate Polymers
Minsu Jang, Jun Sik Kim, Soong Ho Um, Sungwook Yang, Jinseok Kim
Measuring high curvatures is essential in various applications such as structural engineering, medical treatment, and robotics. Herein, we present a novel ultra-high curvature sensor with an ultra-thin and highly flexible structure incorporating fiber Bragg gratings (FBGs). The sensor can measure curvature of bidirectional bending up to 200 m-1 . In addition, the multi-bend curvature sensor in conjunction with the proposed calibration scheme enables the accurate reconstruction of a curve with varying curvature...
February 4, 2019: Optics Express
Soonjae Pyo, Jungwook Choi, Jongbaeg Kim
The functionalization of graphene with organic molecules is beneficial for the realization of high-performance graphene sensors because functionalization can provide enhanced functionalities beyond the properties of pristine graphene. Although various types of sensors based on organic-graphene hybrids have been developed, the functionalization processes have poor thickness-controllability/reliability or require post-processing, and sensor applications rely on conventional, rigid substrates such as SiO2/Si. Here, a flexible and transparent metalloporphyrin (MPP)-graphene hybrid for sensitive UV detection and chemical sensing is demonstrated...
February 5, 2019: Nanotechnology
Sathish Chander Dhanabalan, Balaji Dhanabalan, Xing Chen, Joice Sophia Ponraj, Han Zhang
The journey of smart textile-based wearable technologies first started with the attachment of sensors to fabrics, followed by embedding sensors in apparels. Presently, garments themselves can be transformed into sensors, which demonstrates the tremendous growth in the field of smart textiles. Wearable applications demand flexible materials that can withstand deformation for their practical use on par with conventional textiles. To address this, we explore the potential reasons for the enhanced performance of wearable devices realized from the fabrication of carbon nanostructured fibers with the use of graphene, carbon nanotubes and other two-dimensional materials...
February 5, 2019: Nanoscale
Arushi Gupta, Sanjeev K Bhardwaj, Amit L Sharma, Ki-Hyun Kim, Akash Deep
Because of numerous merits (e.g., the possibility of their synthesis in 1-D, 2-D, and 3-D forms, large surface-to-volume ratio, and flexible framework functionality), metal-organic frameworks (MOFs) are envisaged as excellent media for the development of biosensors for diverse analytes present in environmental media. The present research work, for the first time, reports the development of a Cu-MOF based electrochemical biosensor for highly sensitive detection of E. coli bacteria. In order to realize an MOF-based electrochemically active platform, Cu3 (BTC)2 (BTC = 1,3,5-benzenetricarboxylic acid) was mixed with polyaniline (PANI)...
January 30, 2019: Environmental Research
Tatsuho Nagatomo, Norihisa Miki
Polymer-based flexible micro electro mechanical systems (MEMS) tactile sensors have been widely studied for a variety of applications, such as medical and robot fields. The small size and flexibility are of great advantage in terms of accurate measurement and safety. Polydimethylsiloxane (PDMS) is often used as the flexible structural material. However, the sensors are likely subject to large parasitic capacitance noise. The smaller dielectric constant leads to smaller influences of parasitic capacitance and a larger signal-to-noise ratio...
November 3, 2018: Micromachines
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"