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https://www.readbyqxmd.com/read/29786723/a-highly-sensitive-and-fast-graphene-nanoribbon-cspbbr-3-quantum-dot-phototransistor-with-enhanced-vertical-metal-oxide-heterostructures
#1
Xiang Liu, Wenjian Kuang, Haibing Ni, Zhi Tao, Qianqian Huang, Jing Chen, Qingquan Liu, Jianhua Chang, Wei Lei
Although recent breakthroughs in reported graphene-based phototransistors with embedded quantum dots (QDs) have definitely been astonishing, there are still some obstacles in their practical use with regard to their electrical and optical performances. We show that through optimization of the vertical graphene nanoribbon (GNR)/QD/IGZO heterostructure and the ultrahigh efficiency of CsPbBr3 QDs, it is possible to significantly increase the on/off ratio (>103), the subthreshold slope (S.S., 0.9 V dec-1), the device's field effect mobility (μFET, 13 cm-1 V-1 S-1) and other electrical properties...
May 22, 2018: Nanoscale
https://www.readbyqxmd.com/read/29786410/percutaneous-deep-venous-arterialization-in-patients-with-critical-limb-ischemia-a-technical-note
#2
Steven Kum, Eline Huizing, Michiel A Schreve, Çagdas Ünlü, Roberto Ferraresi, Lasitha B Samarakoon, Daniel A van den Heuvel
Critical limb ischemia (CLI) is the presentation of end stage peripheral arterial disease and typically presents with rest pain, ulceration and gangrene. The outcome of conservative treatment is poor and often leads to amputations. Arterial revascularization plays an important role in amputation prevention. Unfortunately, a significant percentage of CLI patients cannot be revascularized and subsequently end up with a palliative amputation. This has led to the need and exploration of new treatment options in this no option subgroup of CLI...
May 22, 2018: Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/29785792/gap-mode-surface-plasmon-enhanced-photoluminescence-and-photoresponse-of-mos-2
#3
Zhi-Qian Wu, Jing-Liang Yang, Nallappagar K Manjunath, Yue-Jiao Zhang, Si-Rui Feng, Yang-Hua Lu, Jiang-Hong Wu, Wei-Wei Zhao, Cai-Yu Qiu, Jian-Feng Li, Shi-Sheng Lin
2D materials hold great potential for designing novel electronic and optoelectronic devices. However, 2D material can only absorb limited incident light. As a representative 2D semiconductor, monolayer MoS2 can only absorb up to 10% of the incident light in the visible, which is not sufficient to achieve a high optical-to-electrical conversion efficiency. To overcome this shortcoming, a "gap-mode" plasmon-enhanced monolayer MoS2 fluorescent emitter and photodetector is designed by squeezing the light-field into Ag shell-isolated nanoparticles-Au film gap, where the confined electromagnetic field can interact with monolayer MoS2 ...
May 22, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29785557/highly-sensitive-ethanol-chemical-sensor-based-on-novel-ag-doped-mesoporous-%C3%AE-fe-2-o-3-prepared-by-modified-sol-gel-process
#4
Moteb M Alqahtani, Atif M Ali, Farid A Harraz, M Faisal, Adel A Ismail, Mahmoud A Sayed, M S Al-Assiri
Mesoporous α-Fe2 O3 has been synthesized via a simple sol-gel procedure in the presence of Pluronic (F-127) triblock copolymer as structure directing agent. Silver (Ag) nanoparticles were deposited onto α-Fe2 O3 matrix by the photochemical reduction approach. Morphological analysis revealed the formation of Ag nanoparticles with small sizes < 20 nm onto the mesoporous structure of α-Fe2 O3 possessing < 50 nm semi-spherical shape. The XRD, FTIR, Raman, UV-vis, PL, and N2 sorption isotherm studies confirmed the high crystallinity, mesoporosity, and optical characteristics of the synthesized product...
May 21, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/29784559/anodic-versus-cathodic-neurostimulation-of-the-subthalamic-nucleus-a-randomized-controlled-study-of-acute-clinical-effects
#5
Anna Dalal Kirsch, Sharon Hassin-Baer, Cordula Matthies, Jens Volkmann, Frank Steigerwald
INTRODUCTION: Stimulation settings of deep brain stimulation (DBS) have evolved empirically within a limited parameter space dictated by first generation devices. There is a need for controlled clinical studies, which evaluate efficacy and safety of established programming practice against novel programming options provided by modern neurostimulation devices. METHODS: Here, we tested a polarity reversal from conventional monopolar cathodic to anodic stimulation in an acute double-blind, randomized, cross-over study in patients with PD implanted with bilateral STN DBS...
May 16, 2018: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/29784362/programmable-electrochemical-flow-system-for-high-throughput-determination-of-total-antioxidant-capacity
#6
Kornautchaya Veenuttranon, Loc Thai Nguyen
The aim of this work was to develop a programmable flow system for rapid assessment of total antioxidant capacity (TAC). Novel features of the prototype include a single pressure-driven source, versatile manipulation of fluid flows, ability to adapt to different TAC assays, and compatibility with microfluidic design. Antioxidant activity was determined by electrochemical measurement of residual 2,2-diphenyl-2-picrylhydrayl hydrate (DPPH•) free radicals in the solution. The overall performance of the device was validated by the spectrophotometric method...
August 15, 2018: Talanta
https://www.readbyqxmd.com/read/29783914/early-application-of-an-intermittent-pneumatic-compression-device-is-safe-and-results-in-proximal-arteriovenous-fistula-enlargement
#7
Sanjay Desai, Amit Mitra, Ed Arkans, Tej M Singh
INTRODUCTION: Delays in arteriovenous fistula maturation can cause care delays and increased costs. Increased distention pressure and intermittent wall shear stress may dilate veins based on prior research. Early use of non-invasive devices may help assist clinical arteriovenous fistula dilation. METHODS: This was an Institutional Review Board approved study. After arteriovenous fistula creation, a novel, intermittent pneumatic compression device (Fist Assist® ) was applied 15 cm proximal to arteriovenous fistula enabling 60 mmHg of cyclic compression for 6 h daily for 30 days...
May 1, 2018: Journal of Vascular Access
https://www.readbyqxmd.com/read/29783673/application-of-a-novel-s3-nanowire-gas-sensor-device-in-parallel-with-gc-ms-for-the-identification-of-rind-percentage-of-grated-parmigiano-reggiano
#8
Marco Abbatangelo, Estefanía Núñez-Carmona, Veronica Sberveglieri, Dario Zappa, Elisabetta Comini, Giorgio Sberveglieri
Parmigiano Reggiano cheese is one of the most appreciated and consumed foods worldwide, especially in Italy, for its high content of nutrients and taste. However, these characteristics make this product subject to counterfeiting in different forms. In this study, a novel method based on an electronic nose has been developed to investigate the potentiality of this tool to distinguish rind percentages in grated Parmigiano Reggiano packages that should be lower than 18%. Different samples, in terms of percentage, seasoning and rind working process, were considered to tackle the problem at 360°...
May 18, 2018: Sensors
https://www.readbyqxmd.com/read/29782944/a-comprehensive-review-on-contact-lens-for-ophthalmic-drug-delivery
#9
REVIEW
Jiawen Xu, Yingyan Xue, Gaoyong Hu, Tianyu Lin, Jingxin Gou, Tian Yin, Haibing He, Yu Zhang, Xing Tang
With the prevalence of electronic devices and an aging population, the number of people affected with eye disease is increasing year by year. In spite of a large number of eye drops on the market, most of them do not perform sufficiently, due to rapid clearance mechanisms and ocular barriers. To enhance drug delivery to the eye, a number of novel formulations for ocular diseases have been investigated over recent decades, aiming to increase drug retention and permeation while also allowing for sustained drug release over prolonged periods...
May 18, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29782681/highly-efficient-nonfullerene-polymer-solar-cells-enabled-by-a-copper-i-coordination-strategy-employing-an-1-3-4-oxadiazole-containing-wide-bandgap-copolymer-donor
#10
Xiaopeng Xu, Zuojia Li, Zhaozhao Bi, Ting Yu, Wei Ma, Kui Feng, Ying Li, Qiang Peng
A novel wide-bandgap copolymer of PBDT-ODZ based on benzo[1,2-b:4,5-b' ]dithiophene (BDT) and 1,3,4-oxadiazole (ODZ) blocks is developed for efficient nonfullerene polymer solar cells (NF-PSCs). PBDT-ODZ exhibits a wide bandgap of 2.12 eV and a low-lying highest occupied molecular orbital (HOMO) level of -5.68 eV, which could match well with the low-bandgap acceptor of 3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone)-5,5,11,11-tetrakis(4-hexylthienyl)-dithieno[2,3-d:2',3'-d']-s-indaceno[1,2-b:5,6-b']-dithiophene (ITIC-Th), inducing a good complementary absorption from 300 to 800 nm and a minimal HOMO level offset (0...
May 21, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29782659/self-suspended-nanomesh-scaffold-for-ultrafast-flexible-photodetectors-based-on-organic-semiconducting-crystals
#11
Lei Zhang, Nadiia Pasthukova, Yifan Yao, Xiaolan Zhong, Egon Pavlica, Gvido Bratina, Emanuele Orgiu, Paolo Samorì
Self-standing nanostructures are of fundamental interest in materials science and nanoscience and are widely used in (opto-)electronic and photonic devices as well as in micro-electromechanical systems. To date, large-area and self-standing nanoelectrode arrays assembled on flexible substrates have not been reported. Here the fabrication of a hollow nanomesh scaffold on glass and plastic substrates with a large surface area over 1 mm2 and ultralow leakage current density (≈1-10 pA mm-2 @ 2 V) across the empty scaffold is demonstrated...
May 21, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29781931/ultrasound-assessment-of-ice-ball-formation-by-cryoneurolysis-device-in-an-ex-vivo-model
#12
Adrian Kastler, Hannes Gruber, Elke Gizewski, Alexander Loizides
BACKGROUND AND OBJECTIVES: Real-time ice-ball formation during cryoneurolysis has sparsely been assessed with ultrasound (US). Cryoneurolysis in lower back pain syndrome represents a validated management option in cases of facet joint syndrome. Ultrasound may be a useful tool to perform facet joint cryodenervation. The objective of this study was to assess, ex vivo, the ability of US to assess the ice-ball formation of a cryoneurolysis device. METHODS: Ultrasound assessment of the ice-ball depiction was done using chicken muscle at 22°C in which several freezing cycles were performed with both 2...
May 17, 2018: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/29781869/utilizing-facebook-and-automated-telephone-calls-to-increase-adoption-of-a-local-smoke-alarm-installation-program
#13
Shannon Frattaroli, Eric Schulman, Eileen M McDonald, Elise C Omaki, Wendy C Shields, Vanya Jones, William Brewer
CONTEXT: Innovative strategies are needed to improve the prevalence of working smoke alarms in homes. To our knowledge, this is the first study to report on the effectiveness of Facebook advertising and automated telephone calls as population-level strategies to encourage an injury prevention behavior. OBJECTIVE: We examine the effectiveness of Facebook advertising and automated telephone calls as strategies to enroll individuals in Baltimore City's Fire Department's free smoke alarm installation program...
May 17, 2018: Journal of Public Health Management and Practice: JPHMP
https://www.readbyqxmd.com/read/29781807/word-recognition-re-thinking-prosthetic-vision-evaluation
#14
Shui'Er Han, Cheng Qiu, Kassandra R Lee, JaeHyun Jung, Eli Peli
Evaluations of vision prostheses and sensory substitution devices have frequently relied on repeated training and testing with the same small set of items. These multiple forced-choice tasks have been shown to produce above chance performance in blind patients, but it is unclear if the observed performance represents restoration of vision that transfers to novel, untrained items. Here, we tested the generalizability of the forced-choice paradigm on the discrimination of low-resolution word images. Extensive visual training was conducted with the same 10 words used in previous BrainPort tongue stimulating studies...
May 21, 2018: Journal of Neural Engineering
https://www.readbyqxmd.com/read/29781443/ion-beam-induced-bending-of-semiconductor-nanowires
#15
Imran Hanif, Osmane Camara, Matheus Araújo Tunes, Robert William Harrison, Graeme Greaves, Stephen E Donnelly, Jonathan A Hinks
The miniaturization of technology increasingly requires the development of both new structures as well as novel techniques for their manufacture and modification. Semiconductor nanowires (NWs) are a prime example of this and as such have been the subject of intense scientific research for applications ranging from microelectronics to nano-electromechanical devices. Ion irradiation has long been a key processing step for semiconductors and the natural extension of this technique to the modification of semiconductor NWs has led to the discovery of ion-beam-induced deformation effects...
May 21, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29781267/highly-regular-uniform-k-3-scf-6-mn-4-phosphors-facile-synthesis-microstructures-photo-luminescence-properties-and-application-in-led-devices
#16
Hong Ming, Shuifu Liu, Lili Liu, Jiaqing Peng, Junxiang Fu, Fu Du, Xinyu Ye
A new generation of red phosphors of complex fluoride matrices activated with Mn4+ , has gained a broad interest in getting high color rendering index (CRI), low correlated color temperature (CCT) of white light-emitting diodes(WLEDs). However, besides their instability towards moisture, the extremely irregular and nonuniform morphologies of these phosphors have limited their practical industry applications. In the present study, a novel type of K3 ScF6 :Mn4+ red phosphor with highly regular, uniform and high color purity was synthesized successfully via a facile two-step co-precipitation method under mild conditions...
May 21, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29780910/aerial-drone-misadventure-a-novel-case-of-trauma-resulting-in-ocular-globe-rupture
#17
Eliza E Moskowitz, Yonaton M Siegel-Richman, George Hertner, Thomas Schroeppel
Purpose: The purpose of this case report is to present the novel findings of a drone causing such a traumatic ocular injury and provide recommendations for how it might be prevented. Observations: We report on a recent case where a child presented to our Emergency Department after incurring a blow to the face by the propeller of a remote controlled drone. The patient suffered significant trauma including rupture of the right globe. Conclusions: As drone sales continue to rise, it is important that physicians be prepared to treat the potential injuries that may result from using these devices...
June 2018: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29780802/exploring-the-potential-of-generative-adversarial-networks-for-synthesizing-radiological-images-of-the-spine-to-be-used-in-in-silico-trials
#18
Fabio Galbusera, Frank Niemeyer, Maike Seyfried, Tito Bassani, Gloria Casaroli, Annette Kienle, Hans-Joachim Wilke
In silico trials recently emerged as a disruptive technology, which may reduce the costs related to the development and marketing approval of novel medical technologies, as well as shortening their time-to-market. In these trials, virtual patients are recruited from a large database and their response to the therapy, such as the implantation of a medical device, is simulated by means of numerical models. In this work, we propose the use of generative adversarial networks to produce synthetic radiological images to be used in in silico trials...
2018: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/29780545/an-artificial-photosynthetic-system-for-photoaccumulation-of-two-electrons-on-a-fused-dipyridophenazine-dppz-pyridoquinolinone-ligand
#19
Jean-François Lefebvre, Julian Schindler, Philipp Traber, Ying Zhang, Stephan Kupfer, Stefanie Gräfe, Isabelle Baussanne, Martine Demeunynck, Jean-Marie Mouesca, Serge Gambarelli, Vincent Artero, Benjamin Dietzek, Murielle Chavarot-Kerlidou
Increasing the efficiency of molecular artificial photosynthetic systems is mandatory for the construction of functional devices for solar fuel production. Decoupling the light-induced charge separation steps from the catalytic process is a promising strategy, which can be achieved thanks to the introduction of suitable electron relay units performing charge accumulation. We report here on a novel ruthenium tris-diimine complex able to temporarily store two electrons on a fused dipyridophenazine-pyridoquinolinone π-extended ligand upon visible-light irradiation in the presence of a sacrificial electron donor...
May 7, 2018: Chemical Science
https://www.readbyqxmd.com/read/29780535/-de-novo-design-of-d-%C3%AF-a-molecules-as-universal-hosts-for-monochrome-and-white-phosphorescent-organic-light-emitting-diodes
#20
Wen-Cheng Chen, Yi Yuan, Ze-Lin Zhu, Zuo-Quan Jiang, Shi-Jian Su, Liang-Sheng Liao, Chun-Sing Lee
Two novel D-σ-A host materials 11,11-bis(9-phenyl-9 H -carbazol-3-yl)-11 H -benzo[4,5]imidazo[1,2- a ]indole (BII-BCz) and 4,4'-(11 H -benzo[4,5]imidazo[1,2- a ]indole-11,11-diyl)bis( N , N -diphenylaniline) (BII-TPA) are synthesized by using the sp3 carbon attached to a newly designed 11 H -benzo[4,5]imidazo[1,2- a ]indole building block to link two electron-donating groups. The resulting materials feature high triplet energy levels, good thermal properties and suitable photophysical properties as universal hosts for full-color phosphorescent organic light-emitting diodes (OLEDs)...
May 7, 2018: Chemical Science
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