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https://www.readbyqxmd.com/read/28426040/enhancement-of-the-hole-conducting-effect-of-nio-by-a-n2-blow-drying-method-in-printable-perovskite-solar-cells-with-low-temperature-carbon-as-the-counter-electrode
#1
T A Nirmal Peiris, Ajay K Baranwal, Hiroyuki Kanda, Shota Fukumoto, Shusaku Kanaya, Ludmila Cojocaru, Takeru Bessho, Tsutomu Miyasaka, Hiroshi Segawa, Seigo Ito
In this article, we demonstrate for the first time a mesoscopic printable perovskite solar cell (PSC) using NiO as the hole transporting material and low-temperature processed carbon as the counter electrode. A single deposition method assisted by N2 blow drying was used for the deposition of MAPbI3 on a TiO2/ZrO2/NiO screen-printed electrode. As the final step a low-temperature processing (i.e. 75 °C) carbon counter layer was fabricated on MAPbI3 by a blade coating method. It is found that the capping layer thickness of MAPbI3 has a significant effect on the device efficiency, especially when NiO is introduced as a hole transporting material into the structure...
April 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28417631/inkjet-printed-quantum-dot-light-emitting-diodes-with-an-air-stable-hole-transport-material
#2
Zhenhua Xing, Jinyong Zhuang, Changting Wei, Dongyu Zhang, Zhong-Zhi Xie, Xiao-Ping Xu, Shun-Jun Ji, Jian-Xin Tang, Wenming Su, Zheng Cui
High efficiency quantum dots light emitting diodes (QLEDs) have been fabricated by inkjet printing with a novel cross-linkable hole transport material N,N'-(9,9'-spirobi[fluorene]-2,7-diylbis(4,1-phenylene))bis(N-phenyl-4'-vinyl-[1,1'-biphenyl]-4-amine) (SDTF). The cross-linked SDTF film has excellent solvent resistance, high thermal stability and a highest occupied molecular orbital (HOMO) level of -5.54 eV. The inkjet printed SDTF film is very smooth and uniform with a roughness as low as 0.37 nm, which is comparable with the spin-coated film (0...
April 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28387118/organic-inorganic-copper-ii-based-material-a-low-toxic-highly-stable-light-absorber-for-photovoltaic-application
#3
Xiaolei Li, Xiangli Zhong, Yue Hu, Bochao Li, Yusong Sheng, Yang Zhang, Chao Weng, Ming Feng, Hongwei Han, Jinbin Wang
Lead halide perovskite solar cells have recently emerged as a very promising photovoltaic technology due to their excellent power conversion efficiencies; however, the toxicity of lead and the poor stability of perovskite materials remain two main challenges that need to be addressed. Here, for the first time, we report a lead-free, highly stable C6H4NH2CuBr2I compound. The C6H4NH2CuBr2I films exhibit extraordinary hydrophobic behavior with a contact angle of ∼90°, and their X-ray diffraction patterns remain unchanged even after 4 h of water immersion...
April 20, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28353680/a-self-sustained-wireless-multi-sensor-platform-integrated-with-printable-organic-sensors-for-indoor-environmental-monitoring
#4
Chun-Chang Wu, Wen-Yu Chuang, Ching-Da Wu, Yu-Cheng Su, Yung-Yang Huang, Yang-Jing Huang, Sheng-Yu Peng, Shih-An Yu, Chih-Ting Lin, Shey-Shi Lu
A self-sustained multi-sensor platform for indoor environmental monitoring is proposed in this paper. To reduce the cost and power consumption of the sensing platform, in the developed platform, organic materials of PEDOT:PSS and PEDOT:PSS/EB-PANI are used as the sensing films for humidity and CO₂ detection, respectively. Different from traditional gas sensors, these organic sensing films can operate at room temperature without heating processes or infrared transceivers so that the power consumption of the developed humidity and the CO₂ sensors can be as low as 10 μW and 5 μW, respectively...
March 29, 2017: Sensors
https://www.readbyqxmd.com/read/28327533/flexible-piezoresistive-sensors-embedded-in-3d-printed-tires
#5
Md Omar Faruk Emon, Jae-Won Choi
In this article, we report the development of a flexible, 3D printable piezoresistive pressure sensor capable of measuring force and detecting the location of the force. The multilayer sensor comprises of an ionic liquid-based piezoresistive intermediate layer in between carbon nanotube (CNT)-based stretchable electrodes. A sensor containing an array of different sensing units was embedded on the inner liner surface of a 3D printed tire to provide with force information at different points of contact between the tire and road...
March 22, 2017: Sensors
https://www.readbyqxmd.com/read/28323640/a-micro-scale-printable-nanoclip-for-electrical-stimulation-and-recording-in-small-nerves
#6
Charles A Lissandrello, Winthrop F Gillis, Jun Shen, Ben W Pearre, Flavia Vitale, Matteo Pasquali, Bradley J Holinski, Daniel J Chew, Alice E White, Timothy J Gardner
OBJECTIVE: The vision of bioelectronic medicine is to treat disease by modulating the signaling of visceral nerves near various end organs. In small animal models, the nerves of interest can have small diameters and limited surgical access. New high-resolution methods for building nerve interfaces are desirable. In this study, we present a novel nerve interface and demonstrate its use for stimulation and recording in small nerves. APPROACH: We design and fabricate micro-scale electrode-laden nanoclips capable of interfacing with nerves as small as 50 µm in diameter...
March 21, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28289699/a-database-for-reproducible-manipulation-research-capridb-capture-print-innovate
#7
Florian T Pokorny, Yasemin Bekiroglu, Karl Pauwels, Judith Butepage, Clara Scherer, Danica Kragic
We present a novel approach and database which combines the inexpensive generation of 3D object models via monocular or RGB-D camera images with 3D printing and a state of the art object tracking algorithm. Unlike recent efforts towards the creation of 3D object databases for robotics, our approach does not require expensive and controlled 3D scanning setups and aims to enable anyone with a camera to scan, print and track complex objects for manipulation research. The proposed approach results in detailed textured mesh models whose 3D printed replicas provide close approximations of the originals...
April 2017: Data in Brief
https://www.readbyqxmd.com/read/28269205/gelatin-methacrylamide-hydrogel-with-graphene-nanoplatelets-for-neural-cell-laden-3d-bioprinting
#8
Wei Zhu, Brent T Harris, Lijie Grace Zhang
Nervous system is extremely complex which leads to rare regrowth of nerves once injury or disease occurs. Advanced 3D bioprinting strategy, which could simultaneously deposit biocompatible materials, cells and supporting components in a layer-by-layer manner, may be a promising solution to address neural damages. Here we presented a printable nano-bioink composed of gelatin methacrylamide (GelMA), neural stem cells, and bioactive graphene nanoplatelets to target nerve tissue regeneration in the assist of stereolithography based 3D bioprinting technique...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28256821/low-cost-and-novel-si-based-gel-for-li-ion-batteries
#9
Fucong Lyu, Zhifang Sun, Bo Nan, Sicen Yu, Lujie Cao, Mingyang Yang, Minchan Li, Wenxi Wang, Shaofei Wu, Shanshan Zeng, Hongtao Liu, Zhouguang Lu
Si-based nanostructure composites have been intensively investigated as anode materials for next-generation lithium-ion batteries because of their ultra-high-energy storage capacity. However, it is still a great challenge to fabricate a perfect structure satisfying all the requirements of good electrical conductivity, robust matrix for buffering large volume expansion, and intact linkage of Si particles upon long-term cycling. Here, we report a novel design of Si-based multicomponent three-dimensional (3D) networks in which the Si core is capped with phytic acid shell layers through a facile high-energy ball-milling method...
March 29, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28231405/three-dimensional-printing-of-x-ray-computed-tomography-datasets-with-multiple-materials-using-open-source-data-processing
#10
Ian M Sander, Matthew T McGoldrick, My N Helms, Aislinn Betts, Anthony van Avermaete, Elizabeth Owers, Evan Doney, Taimi Liepert, Glen Niebur, Douglas Liepert, W Matthew Leevy
Advances in three-dimensional (3D) printing allow for digital files to be turned into a "printed" physical product. For example, complex anatomical models derived from clinical or pre-clinical X-ray computed tomography (CT) data of patients or research specimens can be constructed using various printable materials. Although 3D printing has the potential to advance learning, many academic programs have been slow to adopt its use in the classroom despite increased availability of the equipment and digital databases already established for educational use...
February 23, 2017: Anatomical Sciences Education
https://www.readbyqxmd.com/read/28229956/development-of-a-thermosensitive-hama-containing-bio-ink-for-the-fabrication-of-composite-cartilage-repair-constructs
#11
Vivian Hilda Maria Mouser, Anna Abbadessa, Riccardo Levato, Wim Hennink, Tina Vermonden, Debby Gawlitta, Jos Malda
Fine-tuning of bio-ink composition and material processing parameters is crucial for the development of biomechanically relevant cartilage constructs. This study aims to design and develop cartilage constructs with tunable internal architectures and relevant mechanical properties. More specifically, the potential of methacrylated hyaluronic acid (HAMA) added to thermosensitive hydrogels composed of methacrylated poly[N-(2-hydroxypropyl)methacrylamide mono/dilactate] (pHPMA-lac)/polyethylene glycol (PEG) triblock copolymers, to optimize cartilage-like tissue formation by embedded chondrocytes, and enhance printability was explored...
February 23, 2017: Biofabrication
https://www.readbyqxmd.com/read/28227435/gelatin-methacrylamide-hydrogel-with-graphene-nanoplatelets-for-neural-cell-laden-3d-bioprinting
#12
Wei Zhu, Brent T Harris, Lijie Grace Zhang, Wei Zhu, Brent T Harris, Lijie Grace Zhang, Wei Zhu, Brent T Harris, Lijie Grace Zhang
Nervous system is extremely complex which leads to rare regrowth of nerves once injury or disease occurs. Advanced 3D bioprinting strategy, which could simultaneously deposit biocompatible materials, cells and supporting components in a layer-by-layer manner, may be a promising solution to address neural damages. Here we presented a printable nano-bioink composed of gelatin methacrylamide (GelMA), neural stem cells, and bioactive graphene nanoplatelets to target nerve tissue regeneration in the assist of stereolithography based 3D bioprinting technique...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28222258/simple-and-large-scale-strategy-to-prepare-flexible-graphene-tape-electrode
#13
Li Wang, Jie Yu, Yayun Zhang, Han Yang, Longfei Miao, Yonghai Song
A simple and large-scale strategy to prepare flexible graphene tape electrode (GTE) was proposed. The flexible GTE was prepared by a facile peeling method in which a piece of commercial graphite foil was first covered by a commercial acrylic transparent tape and then the transparent adhesive tape was quickly torn off from the graphite foil. Scanning electron microscopy results showed that some folded and wrinkled graphene layers stood up on the GTE surface to form three-dimensional (3D) porous graphene foam...
February 28, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28187519/development-of-a-novel-alginate-polyvinyl-alcohol-hydroxyapatite-hydrogel-for-3d-bioprinting-bone-tissue-engineered-scaffolds
#14
Stephanie T Bendtsen, Sean P Quinnell, Mei Wei
Three-dimensional printed biomaterials used as personalized tissue substitutes have the ability to promote and enhance regeneration in areas of defected tissue. The challenge with 3D printing for bone tissue engineering remains the selection of a material with optimal rheological properties for printing in addition to biocompatibility and capacity for uniform cell incorporation. Hydrogel biomaterials may provide sufficient printability to allow cell encapsulation and bioprinting of scaffolds with uniform cell distribution...
May 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28181617/3d-printable-highly-conductive-hybrid-composites-employing-chemically-reinforced-complex-dimensional-fillers-and-thermoplastic-triblock-copolymers
#15
Yejin Jo, Ju Young Kim, So-Yun Kim, Yeong-Hui Seo, Kwang-Suk Jang, Su Yeon Lee, Sungmook Jung, Beyong-Hwan Ryu, Hyun-Suk Kim, Jang-Ung Park, Youngmin Choi, Sunho Jeong
The use of 3-dimensional (3D) printable conductive materials has gained significant attention for various applications because of their ability to form unconventional geometrical architectures that cannot be realized with traditional 2-dimensional printing techniques. To resolve the major requisites in printed electrodes for practical applications (including high conductivity, 3D printability, excellent adhesion, and low-temperature processability), we have designed a chemically-reinforced multi-dimensional filler system comprising amine-functionalized carbon nanotubes, carboxyl-terminated silver nanoparticles, and Ag flakes, with the incorporation of a thermoplastic polystyrene-polyisoprene-polystyrene (SIS) triblock copolymer...
April 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28157332/arbitrary-shaped-graphene-based-planar-sandwich-supercapacitors-on-one-substrate-with-enhanced-flexibility-and-integration
#16
Shuanghao Zheng, Xingyan Tang, Zhong-Shuai Wu, Yuan-Zhi Tan, Sen Wang, Chenglin Sun, Hui-Ming Cheng, Xinhe Bao
The emerging smart power source-unitized electronics represent an utmost innovative paradigm requiring dramatic alteration from materials to device assembly and integration. However, traditional power sources with huge bottlenecks on the design and performance cannot keep pace with the revolutionized progress of shape-confirmable integrated circuits. Here, we demonstrate a versatile printable technology to fabricate arbitrary-shaped, printable graphene-based planar sandwich supercapacitors based on the layer-structured film of electrochemically exfoliated graphene as two electrodes and nanosized graphene oxide (lateral size of 100 nm) as a separator on one substrate...
February 28, 2017: ACS Nano
https://www.readbyqxmd.com/read/28150486/multifunctional-hybrid-multilayer-gate-dielectrics-with-tunable-surface-energy-for-ultralow-power-organic-and-amorphous-oxide-thin-film-transistors
#17
Hye-Ran Byun, Eun-Ah You, Young-Geun Ha
For large-area, printable, and flexible electronic applications using advanced semiconductors, novel dielectric materials with excellent capacitance, insulating property, thermal stability, and mechanical flexibility need to be developed to achieve high-performance, ultralow-voltage operation of thin-film transistors (TFTs). In this work, we first report on the facile fabrication of multifunctional hybrid multilayer gate dielectrics with tunable surface energy via a low-temperature solution-process to produce ultralow-voltage organic and amorphous oxide TFTs...
March 1, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28117778/morphology-control-for-fully-printable-organic-inorganic-bulk-heterojunction-solar-cells-based-on-a-ti-alkoxide-and-semiconducting-polymer
#18
Takehito Kato, Chihiro Oinuma, Munechika Otsuka, Naoki Hagiwara
The photoactive layer of a typical organic thin-film bulk-heterojunction (BHJ) solar cell commonly uses fullerene derivatives as the electron-accepting material. However, fullerene derivatives are air-sensitive; therefore, air-stable material is needed as an alternative. In the present study, we propose and describe the properties of Ti-alkoxide as an alternative electron-accepting material to fullerene derivatives to create highly air-stable BHJ solar cells. It is well-known that controlling the morphology in the photoactive layer, which is constructed with fullerene derivatives as the electron acceptor, is important for obtaining a high overall efficiency through the solvent method...
January 10, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28102670/microfluidization-of-graphite-and-formulation-of-graphene-based-conductive-inks
#19
Panagiotis G Karagiannidis, Stephen A Hodge, Lucia Lombardi, Flavia Tomarchio, Nicolas Decorde, Silvia Milana, Ilya Goykhman, Yang Su, Steven V Mesite, Duncan N Johnstone, Rowan K Leary, Paul A Midgley, Nicola M Pugno, Felice Torrisi, Andrea C Ferrari
We report the exfoliation of graphite in aqueous solutions under high shear rate [∼ 10(8) s(-1)] turbulent flow conditions, with a 100% exfoliation yield. The material is stabilized without centrifugation at concentrations up to 100 g/L using carboxymethylcellulose sodium salt to formulate conductive printable inks. The sheet resistance of blade coated films is below ∼2Ω/□. This is a simple and scalable production route for conductive inks for large-area printing in flexible electronics.
March 28, 2017: ACS Nano
https://www.readbyqxmd.com/read/28040366/3d-printed-transparent-facemasks-in-the-treatment-of-facial-hypertrophic-scars-of-young-children-with-burns
#20
Yating Wei, Cecilia W P Li-Tsang, Jun Liu, Lihua Xie, Shukai Yue
INTRODUCTION: Facial burns could create serious scar problems resulting disfigurement particularly on children. The conventional methods of producing transparent face masks for scar control remains complex and require dexterous skills of experienced clinician and patients' compliance during fitting. In this study, we adopted a portable 3D scanning and Computer-Aided Design (CAD) to produce 3D-printed transparent facemasks. Its efficacy was tested on two children with facial burns resulting hypertrophic scars...
December 28, 2016: Burns: Journal of the International Society for Burn Injuries
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