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https://www.readbyqxmd.com/read/28340293/functional-paper-based-platform-for-rapid-capture-and-detection-of-ceo2-nanoparticles
#1
Ali Othman, Daniel Andreescu, Dinusha P Karunaratne, Suryadevara V Babu, Silvana Andreescu
Development of systems for capture, sequestration and tracking of nanoparticles (NPs) is becoming a significant focus in many aspects of nanotechnology and environmental research. These systems enable a broad range of applications for evaluating concentration, distribution and effects of NPs for environmental, clinical, epidemiological and occupational exposure studies. Herein, we describe the first example of a ligand-graft multifunctional platform for capture and detection of cerium oxide (CeO2 or ceria) NPs...
March 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28338700/enhanced-piezoelectric-effect-at-the-edges-of-stepped-molybdenum-disulfide-nanosheets
#2
Xiaoxue Song, Fei Hui, Keith Gilmore, Bingru Wang, Guangyin Jing, Zhongchao Fan, Enric Grustan-Gutierrez, Yuanyuan Shi, Lucia Lombardi, Stephen A Hodge, Andrea C Ferrari, Mario Lanza
The development of piezoelectric layered materials may be one of the key elements enabling expansion of nanotechnology, as they offer a solution for the construction of efficient transducers for a wide range of applications, including self-powered devices. Here, we investigate the piezoelectric effect in multilayer (ML) stepped MoS2 flakes obtained by liquid-phase exfoliation, which is especially interesting because it may allow the scalable fabrication of electronic devices using large area deposition techniques (e...
March 24, 2017: Nanoscale
https://www.readbyqxmd.com/read/28338055/fully-printable-strain-engineered-electronic-wrap-for-customizable-soft-electronics
#3
Junghwan Byun, Byeongmoon Lee, Eunho Oh, Hyunjong Kim, Sangwoo Kim, Seunghwan Lee, Yongtaek Hong
Rapid growth of stretchable electronics stimulates broad uses in multidisciplinary fields as well as industrial applications. However, existing technologies are unsuitable for implementing versatile applications involving adaptable system design and functions in a cost/time-effective way because of vacuum-conditioned, lithographically-predefined processes. Here, we present a methodology for a fully printable, strain-engineered electronic wrap as a universal strategy which makes it more feasible to implement various stretchable electronic systems with customizable layouts and functions...
March 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28337913/selective-conversion-from-p-type-to-n-type-of-printed-bottom-gate-carbon-nanotube-thin-film-transistors-and-application-in-cmos-inverters
#4
Qiqi Xu, Jianwen Zhao, Vincenzo Pecunia, Wenya Xu, Chunshan Zhou, Junyan Dou, Weibing Gu, Jian Lin, Lixin Mo, Yanfei Zhao, Zheng Cui
The fabrication of printed high-performance and environmentally stable n-type single-walled carbon nanotube (SWCNT) transistors and their integration into complementary (i.e. CMOS) circuits are widely recognized as key to achieving the full potential of carbon nanotube electronics. Here, we report a simple, efficient, and robust method to convert the polarity of SWCNT thin-film transistors (TFTs) using cheap and readily available ethanolamine as electron doping agent. Printed p-type bottom-gate SWCNT TFTs can be selectively converted into n-type by deposition of ethanolamine inks on the transistor active region via aerosol jet printing...
March 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28328041/sem-microphotogrammetry-a-new-take-on-an-old-method-for-generating-high-resolution-3d-models-from-sem-images
#5
A D Ball, P A Job, A E L Walker
The method we present here uses a scanning electron microscope programmed via macros to automatically capture dozens of images at suitable angles to generate accurate, detailed three-dimensional (3D) surface models with micron-scale resolution. We demonstrate that it is possible to use these Scanning Electron Microscope (SEM) images in conjunction with commercially available software originally developed for photogrammetry reconstructions from Digital Single Lens Reflex (DSLR) cameras and to reconstruct 3D models of the specimen...
March 22, 2017: Journal of Microscopy
https://www.readbyqxmd.com/read/28323479/evaluation-of-measles-mumps-rubella-vaccination-among-newly-arrived-refugees
#6
Deborah Lee, Michelle Weinberg, Stephen Benoit
OBJECTIVES: To assess US availability and use of measles-mumps-rubella (MMR) vaccination documentation for refugees vaccinated overseas. METHODS: We selected 1500 refugee records from 14 states from March 2013 through July 2015 to determine whether overseas vaccination records were available at the US postarrival health assessment and integrated into the Advisory Committee on Immunization Practices schedule. We assessed number of doses, dosing interval, and contraindications...
March 21, 2017: American Journal of Public Health
https://www.readbyqxmd.com/read/28323467/sales-of-nicotine-containing-electronic-cigarette-products-united-states-2015
#7
Kristy L Marynak, Doris G Gammon, Todd Rogers, Ellen M Coats, Tushar Singh, Brian A King
OBJECTIVES: To assess the proportion of electronic cigarette (e-cigarette) products sold in the United States that contain nicotine according to retail scanner data. METHODS: We obtained unit sales data from January 11, 2015, to December 12, 2015, from The Nielsen Company for convenience stores; supermarkets; mass merchandisers; drug, club, and dollar stores; and Department of Defense commissaries. The data did not include purchases from tobacco specialty shops, "vape shops," or online sources...
March 21, 2017: American Journal of Public Health
https://www.readbyqxmd.com/read/28322881/the-cost-of-implementing-two-small-media-interventions-to-promote-hpv-vaccination
#8
Siddharth S Karanth, David R Lairson, Danmeng Huang, Lara S Savas, Sally W Vernon, María E Fernández
OBJECTIVE: To estimate the cost of implementing lay health worker delivered print-based photonovella intervention and iPad-based tailored interactive multimedia intervention (TIMI) to promote Human Papillomavirus (HPV) vaccine uptake and completion among Hispanic parents of daughters 9-17years old. METHODS: We recruited 301 participants in control, 422 in photonovella, and 239 in TIMI clinics. Intervention costs were estimated using micro-costing from the societal perspective...
March 16, 2017: Preventive Medicine
https://www.readbyqxmd.com/read/28319362/tuning-the-work-function-of-printed-polymer-electrodes-by-introducing-a-fluorinated-polymer-to-enhance-the-operational-stability-in-bottom-contact-organic-field-effect-transistors
#9
Se Hyun Kim, Jiye Kim, Sooji Nam, Hwa Sung Lee, Seung Woo Lee, Jaeyoung Jang
Poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) is a promising electrode material for organic electronic devices due to its high conductivity, good mechanical flexibility, and feasibility of easy patterning with various printing methods. The work function of PEDOT:PSS needs to be increased for efficient hole injection and the addition of a fluorine-containing material has been reported to increase the work function of PEDOT:PSS. However, it remains a challenge to print PEDOT:PSS electrodes while simultaneously tuning their work functions...
March 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28317376/all-dielectric-full-color-printing-with-tio2-metasurfaces
#10
Shang Sun, Zhenxing Zhou, Chen Zhang, Yisheng Gao, Zonghui Duan, Shumin Xiao, Qinghai Song
Recently, color generation in resonant nanostructures have been intensively studied. Despite of their exciting progresses, the structural colors are usually generated by the plasmonic resonances of metallic nanoparticles. Due to the inherent plasmon damping, such plasmonic nanostructures are usually hard to create very distinct color impressions. Here we utilize the concept of metasurfaces to produce all-dielectric, low-loss, and high resolution structural colors. We have fabricated TiO2 metasurfaces with electron-beam lithography and a very simple lift-off process...
March 19, 2017: ACS Nano
https://www.readbyqxmd.com/read/28314370/room-temperature-processable-wire-templated-nano-electrodes-for-flexible-and-transparent-all-wire-electronics
#11
Sung-Yong Min, Yeongjun Lee, Se Hyun Kim, Cheolmin Park, Tae-Woo Lee
Sophisticate preparation of arbitrarily-long conducting nanowire electrodes on large area is a significant requirement for development of transparent nano-electronics. We report position-customizable and room-temperature-processable metallic nanowire (NW) electrodes array using aligned NW templates and a demonstration of transparent all-NW-based electronic applications by simple direct-printing. Well-controlled electroless-plating chemistry on a polymer NW template provided a highly-conducting Au NW array with a very low resistivity of 7...
March 17, 2017: ACS Nano
https://www.readbyqxmd.com/read/28299677/a-reagentless-screen-printed-amperometric-biosensor-for-the-determination-of-glutamate-in-food-and-clinical-applications
#12
G Hughes, R M Pemberton, P R Fielden, J P Hart
A reagentless biosensor has been successfully developed to measure glutamate in food and clinical samples. The enzyme, glutamate dehydrogenase (GLDH) and the cofactor, nicotinamide adenine dinucleotide (NAD(+)) are fully integrated onto the surface of a Meldola's Blue screen-printed carbon electrode (MB-SPCE). The biological components are immobilized by utilizing unpurified multi-walled carbon nanotubes (MWCNT's) mixed with the biopolymer chitosan (CHIT), which are drop-coated onto the surface of the MB-SPCE in a layer-by-layer fashion...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28297682/degradation-of-organic-pollutants-by-bio-inspired-rectangular-and-hexagonal-titanium-dioxide-nanostructures
#13
T V M Sreekanth, Jae-Jin Shim, Yong Rok Lee
Dyes are used in textile, printing, leather, pharmaceutical, food and cosmetic industries. Dyes add color and pattern to materials. The presence of even very low concentration of dyes/dyes degradation products in effluent is highly toxic to humans and aquatic organisms. It is important to remove these dye degradation pollutants from the industrial effluents before their disposal. In recent years nanoparticles have been used for the removal of dyes from industrial waste water. Titanium dioxide nanostructures (TiO2 NS) were synthesized via a one-step facile green process...
March 9, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28294256/the-lab-on-pcb-approach-tackling-the-%C3%AE-tas-commercial-upscaling-bottleneck
#14
REVIEW
Despina Moschou, Angeliki Tserepi
Commercialization of lab-on-a-chip devices is currently the "holy grail" within the μTAS research community. While a wide variety of highly sophisticated chips which could potentially revolutionize healthcare, biology, chemistry and all related disciplines are increasingly being demonstrated, very few chips are or can be adopted by the market and reach the end-users. The major inhibition factor lies in the lack of an established commercial manufacturing technology. The lab-on-printed circuit board (lab-on-PCB) approach, while suggested many years ago, only recently has re-emerged as a very strong candidate, owing to its inherent upscaling potential: the PCB industry is well established all around the world, with standardized fabrication facilities and processes, but commercially exploited currently only for electronics...
March 15, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28293725/a-nano-au-c-mwcnt-based-label-free-amperometric-immunosensor-for-the-detection-of-capsicum-chlorosis-virus-in-bell-pepper
#15
Anshul Sharma, Ankur Kaushal, Saurabh Kulshrestha
Accurate and on time diagnosis of plant viruses is an essential prerequisite for efficient control in field conditions. A number of diagnostic methods have been reported with the required level of sensitivity. Here, we propose a label free immunosensor for efficient and sensitive detection of capsicum chlorosis virus (CaCV) in bell pepper. Antigen was immobilized over the surface of gold nanoparticle/multi-walled carbon nanotube (Nano-Au/C-MWCNT) screen printed electrodes using 1-Ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC)/N-hydroxysuccinimide (NHS) cross linking chemistry followed by interaction with groundnut bud necrosis virus (GBNV)/CaCV specific polyclonal antibody...
March 14, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28291910/utilization-of-a-3d-printer-to-fabricate-boluses-used-for-electron-therapy-of-skin-lesions-of-the-eye-canthi
#16
Magdalena Łukowiak, Karolina Jezierska, Marek Boehlke, Marzena Więcko, Adam Łukowiak, Wojciech Podraza, Mirosław Lewocki, Bartłomiej Masojć, Michał Falco
This work describes the use of 3D printing technology to create individualized boluses for patients treated with electron beam therapy for skin lesions of the eye canthi. It aimed to demonstrate the effectiveness of 3D-printed over manually fabricated paraffin boluses. The study involved 11 patients for whom the construction of individual boluses were required. CT scans of the fabricated 3D-printed boluses and paraffin boluses were acquired and superimposed onto patient CT scans to compare their fitting, bolus homogeneity, and underlying dose distribution...
January 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28291798/implantable-porous-gelatin-microspheres-sustained-release-of-bfgf-and-improved-its-neuroprotective-effect-on-rats-after-spinal-cord-injury
#17
Li Lan, Fu-Rong Tian, De-Li ZhuGe, Qi-Chuan ZhuGe, Bi-Xin Shen, Bing-Hui Jin, Jian-Ping Huang, Ming-Ze Wu, Lu-Xin Fan, Ying-Zheng Zhao, He-Lin Xu
In this study, porous gelatin microspheres (GMSs) were constructed to improve the neuroprotective effect of basic fibroblast growth factor (bFGF) on spinal cord injury. GMSs were prepared by a W/O emulsion template, followed by cross-linking, washing and drying. The particle sizes and surface porosity of the blank GMSs were carefully characterized by scan electronic microscopy. The blank GMSs have a mean particle size of 35μm and theirs surface was coarse and porous. bFGF was easily encapsulated inside the bulk GMSs through diffusion along the porous channel...
2017: PloS One
https://www.readbyqxmd.com/read/28291188/quantification-of-peri-implant-bacterial-load-and-in-vivo-biofilm-formation-in-an-innovative-clinically-representative-mouse-model-of-periprosthetic-joint-infection
#18
Alberto V Carli, Samrath Bhimani, Xu Yang, Matthew B Shirley, Karen L de Mesy Bentley, F Patrick Ross, Mathias P G Bostrom
BACKGROUND: Periprosthetic joint infection (PJI) is a devastating complication following total joint arthroplasty. Current animal models of PJI are limited because of a lack of quantitative methods and failure to effectively recreate the periprosthetic space. We therefore developed a murine PJI model involving a 3-dimensionally printed Ti-6Al-4V implant capable of bearing weight and permitting quantitative analysis of periprosthetic bacterial load and evaluation of biofilm. METHODS: Twenty-five 12-week-old C57BL/6 mice received a unilateral proximal tibial implant and intra-articular injection of either 3 × 10 colony forming units (CFUs) of Staphylococcus aureus Xen 36 or saline solution...
March 15, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28290495/dramatic-changes-in-thermoelectric-power-of-germanium-under-pressure-printing-n-p-junctions-by-applied-stress
#19
Igor V Korobeinikov, Natalia V Morozova, Vladimir V Shchennikov, Sergey V Ovsyannikov
Controlled tuning the electrical, optical, magnetic, mechanical and other characteristics of the leading semiconducting materials is one of the primary technological challenges. Here, we demonstrate that the electronic transport properties of conventional single-crystalline wafers of germanium may be dramatically tuned by application of moderate pressures. We investigated the thermoelectric power (Seebeck coefficient) of p- and n-type germanium under high pressure to 20 GPa. We established that an applied pressure of several GPa drastically shifts the electrical conduction to p-type...
March 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28287692/an-origami-perovskite-photodetector-with-spatial-recognition-ability
#20
Huajing Fang, Jiangwei Li, Jie Ding, Yue Sun, Qiang Li, Jia-Lin Sun, Liduo Wang, Qingfeng Yan
Flexible photodetectors are attracting substantial attention because of their promising applications in bendable display and smart clothes which cannot be fulfilled by the existing rigid counterparts. In this work, we demonstrate a newly-designed photodetector constructed on the common printing paper. Pencil trace was applied as the graphite electrode. With such a simple and convenient method, the as-prepared photodetector exhibited a satisfactory responsivity of 4.4 mA/W, on/off current ratio of 32, coupled with a high response speed of < 10 ms...
March 13, 2017: ACS Applied Materials & Interfaces
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