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https://www.readbyqxmd.com/read/29235605/flexible-integrated-diode-transistor-logic-dtl-driving-circuits-based-on-printed-carbon-nanotube-thin-film-transistors-with-low-operation-voltage
#1
Tingting Liu, Jianwen Zhao, Weiwei Xu, Junyan Dou, Xinluo Zhao, Wei Deng, Changting Wei, Wenya Xu, Wenrui Guo, Wenming Su, Jiansheng Jie, Zheng Cui
Fabrication and application of hybrid functional circuits have become a hot research topic in the field of printed electronics. In this study, a novel flexible diode-transistor logic (DTL) driving circuit is proposed, which was fabricated based on a light emitting diode (LED) integrated with printed high-performance single-walled carbon nanotube (SWCNT) thin-film transistors (TFTs). The LED, which is made of AlGaInP on GaAs, is commercial off-the-shelf, which could generate free electrical charges upon white light illumination...
December 13, 2017: Nanoscale
https://www.readbyqxmd.com/read/29227562/crosstalk-between-substance-p-and-calcitonin-gene-related-peptide-during-heterotopic-ossification-in-murine-achilles-tendon
#2
Ceren Tuzmen, Kostas Verdelis, Lee Weiss, Phil Campbell
Heterotopic ossification (HO) is abnormal bone formation within soft tissue, usually predisposed by neurogenic or musculoskeletal trauma. Inflammation resulting from trauma is considered to be the main trigger for HO by eliciting changes within the injury site, including elevation of bone morphogenetic proteins (BMPs). Recent research, however, has also associated changes in sensory neuropeptide expression with HO. Substance P (SP) and calcitonin gene-related peptide (CGRP) are two of those neuropeptides that have been implicated with various aspects of HO, including regulation of inflammation and BMP signaling...
December 11, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29226501/drop-on-drop-multimaterial-3d-bioprinting-realized-by-peroxidase-mediated-cross-linking
#3
Shinji Sakai, Kohei Ueda, Enkhtuul Gantumur, Masahito Taya, Makoto Nakamura
A cytocompatible inkjet bioprinting approach that enables the use of a variety of bioinks to produce hydrogels with a wide range of characteristics is developed. Stabilization of bioinks is caused by horseradish peroxidase (HRP)-catalyzed cross-linking consuming hydrogen peroxide (H2 O2 ). 3D cell-laden hydrogels are fabricated by the sequential dropping of a bioink containing polymer(s) cross-linkable through the enzymatic reaction and H2 O2 onto droplets of another bioink containing the polymer, HRP, and cells...
December 11, 2017: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/29218990/heat-assisted-inkjet-printing-of-tungsten-oxide-for-high-performance-ultraviolet-photodetectors
#4
Brent Cook, Qingfeng Liu, Jackson Butler, Keifer Smith, Karen Shi, Dan Ewing, Matthew Casper, Alex Stramel, Alan Elliot, Judy Z Wu
An ammonium metatungstate precursor ink (WO3Pr) was printed for tungsten oxide (WO3) ultraviolet (UV) detectors on SiO2/Si wafers with prefabricated Au electrodes. A systematic study was carried out on the printing parameters including substrate temperature in the range of 22-80 oC, WO3Pr molar concentrations of 0.01, 0.02 and 0.03 M, and printing scan number up to 7 to understand their effects on the resulted WO3 film morphology and optoelectronic properties. It has been found that the printing parameters can sensitively affect the WO3 film morphology, which in turn impacts the WO3 photodetector performance...
December 8, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29186480/gold-nanoparticle-printed-coverslips-to-facilitate-fluorescence-tem-correlative-microscopy
#5
Neeraj Prabhakar, Anni Määttänen, Jouko Peltonen, Pekka Hänninen, Markus Peurla, Jessica M Rosenholm
Correlative light and electron microscopy (CLEM) allows combining the advantages of fluorescence microscopy and electron microscopy for cell imaging. Rare phenomenon expressing cells can be studied by specifically tagged fluorophores with fluorescence microscopy. Subsequently, cells can be fixed and ultra-structural details can be studied with transmission electron microscopy (TEM) at a higher resolution. However, precise landmarks are necessary to track the same cell throughout the CLEM process. In this technical report, we present a high contrast inkjet-printed gold nanoparticle patterns over commercial glass coverslip to facilitate cell tracking with correlative microscopy...
November 23, 2017: Microscopy
https://www.readbyqxmd.com/read/29183858/qr-encoded-smart-oral-dosage-forms-by-inkjet-printing
#6
Magnus Edinger, Daniel Bar-Shalom, Niklas Sandler, Jukka Rantanen, Natalja Genina
The use of inkjet printing (IJP) technology enables the flexible manufacturing of personalized medicine with the doses tailored for each patient. In this study we demonstrate, for the first time, the applicability of IJP in the production of edible dosage forms in the pattern of a quick response (QR) code. This printed pattern contains the drug itself and encoded information relevant to the patient and/or healthcare professionals. IJP of active pharmaceutical ingredient (API)-containing ink in the pattern of QR code was performed onto a newly developed porous and flexible, but mechanically stable substrate with a good absorption capacity...
November 25, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29160839/inkjet-printing-of-drug-loaded-mesoporous-silica-nanoparticles-a-platform-for-drug-development
#7
Henrika Wickström, Ellen Hilgert, Johan O Nyman, Diti Desai, Didem Şen Karaman, Thomas de Beer, Niklas Sandler, Jessica M Rosenholm
Mesoporous silica nanoparticles (MSNs) have shown great potential in improving drug delivery of poorly water soluble (BCS class II, IV) and poorly permeable (BCS class III, IV) drugs, as well as facilitating successful delivery of unstable compounds. The nanoparticle technology would allow improved treatment by reducing adverse reactions of currently approved drugs and possibly reintroducing previously discarded compounds from the drug development pipeline. This study aims to highlight important aspects in mesoporous silica nanoparticle (MSN) ink formulation development for digital inkjet printing technology and to advice on choosing a method (2D/3D) for nanoparticle print deposit characterization...
November 21, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29147994/printability-of-papers-recycled-from-toner-and-inkjet-printed-papers-after-deinking-and-recycling-processes
#8
Arif Karademir, Cem Aydemir, Dogan Tutak, Raja Aravamuthan
BACKGROUND: In our contemporary world, while part of the fibers used in the paper industry is obtained from primary fibers such as wood and agricultural plants, the rest is obtained from secondary fibers from waste papers. To manufacture paper with high optical quality from fibers of recycled waste papers, these papers require deinking and bleaching of fibers at desired levels. High efficiency in removal of ink from paper mass during recycling, and hence deinkability, are especially crucial for the optical and printability quality of the ultimate manufactured paper...
November 11, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/29136837/optical-molecular-analysis-using-office-flatbed-photo-scanner-new-approaches-and-solutions
#9
K V Oskolok, E V Shults, O V Monogarova, A A Chaplenko
The design and operations principles of a prototype of optical device based on an office flatbed photo scanner with a slide adapter are described in the paper. The developed device is intended for the analysis of liquid-phase samples by colorimetry, photometry, fluorimetry and nephelometry. Teflon cassettes designed for fixing cuvettes on glass plate of the scanner. Teflon wedge-shaped inserts for cuvettes have been developed to optimize the conditions of colorimetric analysis. These inserts allow varying the thickness of the absorbing layer of solutions...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29128261/multi-parametric-rigid-and-flexible-low-cost-disposable-sensing-platforms-for-biomedical-applications
#10
Salzitsa Anastasova, Panagiotis Kassanos, Guang-Zhong Yang
The measurement of Na(+), K(+) and H(+) is essential in medicine and plays an important role in the assessment of tissue ischemia. Microfabrication, inkjet- and screen-printing can be used for solid contact ion selective electrodes (ISE) realization; these, however, can be non-standardized, costly and time consuming processes. We present the realization of ISEs on post-processed electrodes fabricated via standardized printed circuit board (PCB) manufacturing techniques. In vitro results are presented from two rigid platforms (32 ISEs) for liquid sample dip-stick measurements and two flexible platforms (6 and 32 ISEs) for post-surgical intestinal tissue monitoring, each with a common reference electrode (RE)...
October 18, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29125584/review-of-recent-inkjet-printed-capacitive-tactile-sensors
#11
REVIEW
Ahmed Salim, Sungjoon Lim
Inkjet printing is an advanced printing technology that has been used to develop conducting layers, interconnects and other features on a variety of substrates. It is an additive manufacturing process that offers cost-effective, lightweight designs and simplifies the fabrication process with little effort. There is hardly sufficient research on tactile sensors and inkjet printing. Advancements in materials science and inkjet printing greatly facilitate the realization of sophisticated tactile sensors. Starting from the concept of capacitive sensing, a brief comparison of printing techniques, the essential requirements of inkjet-printing and the attractive features of state-of-the art inkjet-printed tactile sensors developed on diverse substrates (paper, polymer, glass and textile) are presented in this comprehensive review...
November 10, 2017: Sensors
https://www.readbyqxmd.com/read/29124930/dual-internal-standards-with-metals-and-molecules-for-maldi-imaging-of-kidney-lipids
#12
Sarah Ahmed Aboulmagd, Diego Esteban-Fernández, Estefania Moreno-Gordaliza, Boris Neumann, Ahmed H El-Khatib, Alberto Lazaro, Alberto Tejedor, M Milagros Gómez-Gómez, Michael W Linscheid
The quest for internal standards useful in MALDI imaging studies goes on to get not only lateral distribution but also reliable abundance of ions, thus quantitative information. We developed a procedure based on application of matrix and dual internal standards to allow intra- and inter-sample normalization of lipids intensities in kidney sections of control and cisplatin-treated Wistar rats. An inkjet printer was used to deposit a custom-prepared ink with DHB as MALDI matrix, a primary lipids-based internal standard, and a spiked lanthanide as a secondary internal standard...
November 10, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29119674/assessment-of-hydrogels-for-bioprinting-of-endothelial-cells
#13
Leo Benning, Ludwig Gutzweiler, Kevin Tröndle, Julian Riba, Roland Zengerle, Peter Koltay, Stefan Zimmermann, G Björn Stark, Günter Finkenzeller
In tissue engineering applications, vascularization can be accomplished by co-implantation of tissue forming cells and endothelial cells (ECs), whereby the latter are able to form functional blood vessels. The use of three-dimensional (3D) bioprinting technologies has the potential to improve the classical tissue engineering approach because these will allow the generation of scaffolds with high spatial control of endothelial cell allocation. This study focuses on a side by side comparisons of popular commercially available bioprinting hydrogels (matrigel, fibrin, collagen, gelatin, agarose, Pluronic F-127, alginate and alginate/gelatin) in the context of their physicochemical parameters, their swelling/degradation characteristics, their biological effects on vasculogenesis-related EC parameters and their printability...
November 8, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29119163/superhydrophobic-inkjet-printed-flexible-graphene-circuits-via-direct-pulsed-laser-writing
#14
Suprem R Das, Srilok Srinivasan, Loreen R Stromberg, Qing He, Nathaniel Garland, Warren E Straszheim, Pulickel M Ajayan, Ganesh Balasubramanian, Jonathan C Claussen
Solution-phase printing of exfoliated graphene flakes is emerging as a low-cost means to create flexible electronics for numerous applications. The electrical conductivity and electrochemical reactivity of printed graphene has been shown to improve with post-print processing methods such as thermal, photonic, and laser annealing. However, to date no reports have shown the manipulation of surface wettability via post-print processing of printed graphene. Herein, we demonstrate how the energy density of a direct-pulsed laser writing (DPLW) technique can be varied to tune the hydrophobicity and electrical conductivity of the inkjet-printed graphene (IPG)...
November 9, 2017: Nanoscale
https://www.readbyqxmd.com/read/29112150/fabrication-of-in-vitro-cancer-microtissue-array-on-fibroblast-layered-nanofibrous-membrane-by-inkjet-printing
#15
Tae-Min Park, Donggu Kang, Ilho Jang, Won-Soo Yun, Jin-Hyung Shim, Young Hun Jeong, Jong-Young Kwak, Sik Yoon, Songwan Jin
In general, a drug candidate is evaluated using 2D-cultured cancer cells followed by an animal model. Despite successful preclinical testing, however, most drugs that enter human clinical trials fail. The high failure rates are mainly caused by incompatibility between the responses of the current models and humans. Here, we fabricated a cancer microtissue array in a multi-well format that exhibits heterogeneous and batch-to-batch structure by continuous deposition of collagen-suspended Hela cells on a fibroblast-layered nanofibrous membrane via inkjet printing...
November 7, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29110465/rayleigh-instability-assisted-satellite-droplets-elimination-in-inkjet-printing
#16
Qiang Yang, Huizeng Li, Mingzhu Li, Yanan Li, Shuoran Chen, Bin Bao, Yanlin Song
Elimination of satellite droplets in inkjet printing has long been desired for high-resolution and precision printing of functional materials and tissues. Generally, the strategy to suppress satellite droplets is to control ink properties, such as viscosity or surface tension, to assist ink filaments in retracting into one drop. However, this strategy brings new restrictions to the ink, such as ink viscosity, surface tension, and concentration. Here, we report an alternative strategy that the satellite droplets are eliminated by enhancing Rayleigh instability of filament at the break point to accelerate pinch-off of the droplet from the nozzle...
November 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29109396/electricity-generation-from-digitally-printed-cyanobacteria
#17
Marin Sawa, Andrea Fantuzzi, Paolo Bombelli, Christopher J Howe, Klaus Hellgardt, Peter J Nixon
Microbial biophotovoltaic cells exploit the ability of cyanobacteria and microalgae to convert light energy into electrical current using water as the source of electrons. Such bioelectrochemical systems have a clear advantage over more conventional microbial fuel cells which require the input of organic carbon for microbial growth. However, innovative approaches are needed to address scale-up issues associated with the fabrication of the inorganic (electrodes) and biological (microbe) parts of the biophotovoltaic device...
November 6, 2017: Nature Communications
https://www.readbyqxmd.com/read/29105715/vertically-stacked-nanocellulose-tactile-sensor
#18
Minhyun Jung, Kyungkwan Kim, Bumjin Kim, Kwang-Jae Lee, Jae-Wook Kang, Sanghun Jeon
Paper-based electronic devices are attracting considerable attention, because the paper platform has unique attributes such as flexibility and eco-friendliness. Here we report on what is claimed to be the firstly fully integrated vertically-stacked nanocellulose-based tactile sensor, which is capable of simultaneously sensing temperature and pressure. The pressure and temperature sensors are operated using different principles and are stacked vertically, thereby minimizing the interference effect. For the pressure sensor, which utilizes the piezoresistance principle under pressure, the conducting electrode was inkjet printed on the TEMPO-oxidized-nanocellulose patterned with micro-sized pyramids, and the counter electrode was placed on the nanocellulose film...
November 16, 2017: Nanoscale
https://www.readbyqxmd.com/read/29097768/freeform-micropatterning-of-living-cells-into-cell-culture-medium-using-direct-inkjet-printing
#19
Ju An Park, Sejeong Yoon, Jimin Kwon, Hesung Now, Young Kwon Kim, Woo-Jong Kim, Joo-Yeon Yoo, Sungjune Jung
Microfabrication methods have widely been used to control the local cellular environment on a micron scale. However, accurately mimicking the complexity of the in vivo tissue architecture while maintaining the freedom of form and design is still a challenge when co-culturing multiple types of cells on the same substrate. For the first time, we present a drop-on-demand inkjet printing method to directly pattern living cells into a cell-friendly liquid environment. High-resolution control of cell location is achieved by precisely optimizing printing parameters with high-speed imaging of cell jetting and impacting behaviors...
November 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29096111/sessile-nanofluid-droplet-can-act-like-a-crane
#20
Angkur Jyoti Dipanka Shaikeea, Saptarshi Basu, Lalit Bansal
Interactive droplet systems form the backbone for emerging avenues in droplet based technologies like cell sorting, inkjet printing and digital microfluidics, to name a few. These and their associated fields have gained significant importance in the recent times. Here, we report one such phenomenon wherein a naturally evaporating nanocolloidal sessile droplet interacts with a porous silica gel bead to mimic a macro scale mechanical crane assembly. Precisely, we show a sequence of events displayed by the particle laden aqueous droplet (nanoparticles of silica at different loading rates placed on a hydrophobic substrate) when brought in contact with a meso-porous silica gel bead...
October 25, 2017: Journal of Colloid and Interface Science
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