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https://www.readbyqxmd.com/read/29758409/tailoring-metal-oxide-nanoparticle-dispersions-for-inkjet-printing
#1
J S Gebauer, V Mackert, S Ognjanović, M Winterer
There is a growing interest in science and industry for printed electronics. Printed electronics enable the production of large quantities of electronic components at low cost. Even though organic semiconductors are already widely used for printed components, inorganic materials may be advantageous due to their higher durability and superior device performance. Nevertheless, inorganic materials still remain difficult to print making the development of printable and functional inks a necessity. In this work we present the formulation, inkjet printing and processing of newly developed inks based on ethylene glycol as dispersion medium...
May 4, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29743664/three-dimensional-printed-electrode-and-its-novel-applications-in-electronic-devices
#2
Chuan Yi Foo, Hong Ngee Lim, Mohd Adzir Mahdi, Mohd Haniff Wahid, Nay Ming Huang
Three-dimensional (3D) printing technology provides a novel approach to material fabrication for various applications because of its ability to create low-cost 3D printed platforms. In this study, a printable graphene-based conductive filament was employed to create a range of 3D printed electrodes (3DEs) using a commercial 3D printer. This printing technology provides a simplistic and low-cost approach, which eliminates the need for the ex-situ modification and post-treatment of the product. The conductive nature of the 3DEs provides numerous deposition platforms for electrochemical active nanomaterials such as graphene, polypyrrole, and cadmium sulfide, either through electrochemical or physical approaches...
May 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29741166/extending-lead-free-hybrid-photovoltaic-materials-to-new-structures-thiazolium-aminothiazolium-and-imidazolium-iodobismuthates
#3
Tianyue Li, Qifei Wang, Gary S Nichol, Carole A Morrison, Hongwei Han, Yue Hu, Neil Robertson
We report on the synthesis, crystal structures, optoelectronic properties and solar cell device studies of three novel organic-inorganic iodobismuthates - [C3H4NS]3[Bi2I9] ([TH]3[Bi2I9]), [C3H4N2]3[Bi2I9] ([IM]3[Bi2I9]) and [C3H5N2S][BiI4] ([AT][BiI4]) as lead-free light harvesters. [TH]3[Bi2I9] and [IM]3[Bi2I9] show zero-dimensional structures, whereas a one-dimensional edge-sharing chain structure of BiI6-octahedra was observed in [AT][BiI4], with interchain short II contacts also giving rise to the possibility of three-dimensional charge transport ability...
May 9, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29736971/materials-processes-and-facile-manufacturing-for-bioresorbable-electronics-a-review
#4
REVIEW
Xiaowei Yu, Wan Shou, Bikram K Mahajan, Xian Huang, Heng Pan
Bioresorbable electronics refer to a new class of advanced electronics that can completely dissolve or disintegrate with environmentally and biologically benign byproducts in water and biofluids. They have provided a solution to the growing electronic waste problem with applications in temporary usage of electronics such as implantable devices and environmental sensors. Bioresorbable materials such as biodegradable polymers, dissolvable conductors, semiconductors, and dielectrics are extensively studied, enabling massive progress of bioresorbable electronic devices...
May 7, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29733499/unravelling-correlation-between-charge-mobility-and-cocrystallization-in-rod-rod-block-copolymer-for-high-performance-field-effect-transistors
#5
Mingjing Zhu, Shuang Pan, Yue Wang, Ping Tang, Feng Qiu, Zhiqun Lin, Juan Peng
The ability to capitalize on the cocrystallization strategy involving two or more components aggregating into cocrystals renders the creation of materials and devices with markedly improved charge mobility. This, however, has yet to be largely explored in all-conjugated block copolymers (BCPs). Herein, we report on the first investigation into the correlation between cocrystals and charge mobility in a series of new all-conjugated BCPs, namely, poly(3-butylthiophene)-b-poly(3-hexylselenophene) (P3BT-b-P3HS) with varied P3BT/P3HS block ratios for high-performance field-effect transistors...
May 7, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29710811/type-i-collagen-and-strontium-containing-mesoporous-glass-particles-as-hybrid-material-for-3d-printing-of-bone-like-materials
#6
Giorgia Montalbano, Sonia Fiorilli, Andrea Caneschi, Chiara Vitale-Brovarone
Bone tissue engineering offers an alternative promising solution to treat a large number of bone injuries with special focus on pathological conditions, such as osteoporosis. In this scenario, the bone tissue regeneration may be promoted using bioactive and biomimetic materials able to direct cell response, while the desired scaffold architecture can be tailored by means of 3D printing technologies. In this context, our study aimed to develop a hybrid bioactive material suitable for 3D printing of scaffolds mimicking the natural composition and structure of healthy bone...
April 28, 2018: Materials
https://www.readbyqxmd.com/read/29707849/3d-printable-photochromic-molecular-materials-for-reversible-information-storage
#7
Dominic J Wales, Qun Cao, Katharina Kastner, Erno Karjalainen, Graham N Newton, Victor Sans
The formulation of advanced molecular materials with bespoke polymeric ionic-liquid matrices that stabilize and solubilize hybrid organic-inorganic polyoxometalates and allow their processing by additive manufacturing, is effectively demonstrated. The unique photo and redox properties of nanostructured polyoxometalates are translated across the scales (from molecular design to functional materials) to yield macroscopic functional devices with reversible photochromism. These properties open a range of potential applications including reversible information storage based on controlled topological and temporal reduction/oxidation of pre-formed printed devices...
April 30, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29707072/material-challenges-for-solar-cells-in-the-twenty-first-century-directions-in-emerging-technologies
#8
REVIEW
Samy Almosni, Amaury Delamarre, Zacharie Jehl, Daniel Suchet, Ludmila Cojocaru, Maxime Giteau, Benoit Behaghel, Anatole Julian, Camille Ibrahim, Léa Tatry, Haibin Wang, Takaya Kubo, Satoshi Uchida, Hiroshi Segawa, Naoya Miyashita, Ryo Tamaki, Yasushi Shoji, Katsuhisa Yoshida, Nazmul Ahsan, Kentaro Watanabe, Tomoyuki Inoue, Masakazu Sugiyama, Yoshiaki Nakano, Tomofumi Hamamura, Thierry Toupance, Céline Olivier, Sylvain Chambon, Laurence Vignau, Camille Geffroy, Eric Cloutet, Georges Hadziioannou, Nicolas Cavassilas, Pierre Rale, Andrea Cattoni, Stéphane Collin, François Gibelli, Myriam Paire, Laurent Lombez, Damien Aureau, Muriel Bouttemy, Arnaud Etcheberry, Yoshitaka Okada, Jean-François Guillemoles
Photovoltaic generation has stepped up within the last decade from outsider status to one of the important contributors of the ongoing energy transition, with about 1.7% of world electricity provided by solar cells. Progress in materials and production processes has played an important part in this development. Yet, there are many challenges before photovoltaics could provide clean, abundant, and cheap energy. Here, we review this research direction, with a focus on the results obtained within a Japan-French cooperation program, NextPV, working on promising solar cell technologies...
2018: Science and Technology of Advanced Materials
https://www.readbyqxmd.com/read/29705105/photocurable-poly-ethylene-glycol-as-a-bioink-for-the-inkjet-3d-pharming-of-hydrophobic-drugs
#9
Giovanny F Acosta-Vélez, Timothy Z Zhu, Chase S Linsley, Benjamin M Wu
Binder jetting and material extrusion are the two most common additive manufacturing techniques used to create pharmaceutical tablets. However, their versatility is limited since the powder component is present throughout the dosage forms fabricated by binder jet 3D printing and material extrusion 3D printing requires high operating temperatures. Conversely, material jetting allows for compositional control at a voxel level and can dispense material at room temperature. Unfortunately, there are a limited number of materials that are both printable and biocompatible...
April 26, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29694477/unraveling-the-solvent-induced-welding-of-silver-nanowires-for-high-performance-flexible-transparent-electrodes
#10
Kui Zhang, Jia Li, Yunsheng Fang, Beibei Luo, Yanli Zhang, Yanqiu Li, Jun Zhou, Bin Hu
A solution processed metal nanowire network is a promising flexible transparent electrode to replace brittle metal oxides for printable optoelectronics applications, but suffers from the issue of pseudo contact between nanowires. Herein, using volatile solvent mists as a powerful "zipper", we demonstrate a simple and rapid method to effectively weld silver nanowires, which dramatically improves the conductivity and robustness of the silver nanowire network based flexible transparent electrodes. We reveal that for a stacked network structure, the unique wedge-shaped nanogaps between the long nanowires and substrate provide a strong capillary force during solvent evaporation, which is much larger than that between zero-dimensional nanoparticles and gives a decisive contribution for nanowire junction welding, and this nanowire-substrate interplay force is positively related to the wettability of the substrate...
April 25, 2018: Nanoscale
https://www.readbyqxmd.com/read/29687991/interface-engineering-based-on-liquid-metal-for-compact-layer-free-fully-printable-mesoscopic-perovskite-solar-cells
#11
Yumin Zhang, Jianhong Zhao, Jin Zhang, Xixi Jiang, Zhongqi Zhu, Qingju Liu
A printing process for the fabrication of perovskite solar cells (PSCs) exhibits promising future application in the photovoltaic industry due to its low-cost and eco-friendly preparation. In mesoscopic carbon-based PSCs, however, compared to conventional ones, the hole-transport-layer-free PSCs often lead to inefficient hole extraction. Here, we used liquid metal (LM, Galinstan) as an interface modifier material in combination with a carbon electrode. Considering the high conductivity and room-temperature fluidity, it is found that LMs are superior in improving hole extraction and, more importantly, LMs tend to be reserved at the interface between ZrO2 and carbon for enhancing the contact property...
April 24, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29680281/multi-purposable-filaments-of-hpmc-for-3d-printing-of-medications-with-tailored-drug-release-and-timed-absorption
#12
Hossam Kadry, Taslim A Al-Hilal, Ali Keshavarz, Farzana Alam, Changxue Xu, Abraham Joy, Fakhrul Ahsan
Three-dimensional printing (3DP), though developed for nonmedical applications and once regarded as futuristic only, has recently been deployed for the fabrication of pharmaceutical products. However, the existing feeding materials (inks and filaments) that are used for printing drug products have various shortcomings, including the lack of biocompatibility, inadequate extrudability and printability, poor drug loading, and instability. Here, we have sought to develop a filament using a single pharmaceutical polymer, with no additives, which can be multi-purposed and manipulated by computational design for the preparation of tablets with desired release and absorption patterns...
April 19, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29667676/functional-inks-and-printing-of-two-dimensional-materials
#13
REVIEW
Guohua Hu, Joohoon Kang, Leonard W T Ng, Xiaoxi Zhu, Richard C T Howe, Christopher G Jones, Mark C Hersam, Tawfique Hasan
Graphene and related two-dimensional materials provide an ideal platform for next generation disruptive technologies and applications. Exploiting these solution-processed two-dimensional materials in printing can accelerate this development by allowing additive patterning on both rigid and conformable substrates for flexible device design and large-scale, high-speed, cost-effective manufacturing. In this review, we summarise the current progress on ink formulation of two-dimensional materials and the printable applications enabled by them...
April 18, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/29665285/hemostatic-and-absorbent-polyhipe-kaolin-composites-for-3d-printable-wound-dressing-materials
#14
Benjamin C Streifel, Jeffrey G Lundin, Allix M Sanders, Karli A Gold, Thomas S Wilems, Sierra J Williams, Elizabeth Cosgriff-Hernandez, James H Wynne
A novel hemostatic and absorbent wound dressing material compatible with 3D printing is developed to address deficiencies in current wound dressing protocol. The design involves an open celled, microporous hydrogel foam via a high internal phase emulsion (HIPE) template with biocompatible components and tunable hemostatic character by kaolin loading, the viscosity and cure kinetics of which are tailored for 3D printing applications. The use of nontoxic mineral oil organic phase results in cytocompatability with human dermal fibroblasts...
April 17, 2018: Macromolecular Bioscience
https://www.readbyqxmd.com/read/29656459/desktop-stereolithography-3d-printing-of-a-poly-dimethylsiloxane-based-material-with-sylgard-184-properties
#15
Nirveek Bhattacharjee, Cesar Parra-Cabrera, Yong Tae Kim, Alexandra P Kuo, Albert Folch
The advantageous physiochemical properties of poly(dimethylsiloxane) (PDMS) have made it an extremely useful material for prototyping in various technological, scientific, and clinical areas. However, PDMS molding is a manual procedure and requires tedious assembly steps, especially for 3D designs, thereby limiting its access and usability. On the other hand, automated digital manufacturing processes such as stereolithography (SL) enable true 3D design and fabrication. Here the formulation, characterization, and SL application of a 3D-printable PDMS resin (3DP-PDMS) based on commercially available PDMS-methacrylate macromers, a high-efficiency photoinitiator and a high-absorbance photosensitizer, is reported...
April 14, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29617311/special-issue-nextgen-materials-for-3d-printing
#16
EDITORIAL
Chee Kai Chua, Wai Yee Yeong, Jia An
Only a handful of materials are well-established in three-dimensional (3D) printing and well-accepted in industrial manufacturing applications. However, recent advances in 3D printable materials have shown potential for enabling numerous novel applications in the future. This special issue, consisting of 2 reviews and 10 research articles, intends to explore the possible materials that could define next-generation 3D printing.
April 4, 2018: Materials
https://www.readbyqxmd.com/read/29614811/material-considerations-for-fused-filament-fabrication-of-solid-dosage-forms
#17
Evert Fuenmayor, Martin Forde, Andrew V Healy, Declan M Devine, John G Lyons, Christopher McConville, Ian Major
Material choice is a fundamental consideration when it comes to designing a solid dosage form. The matrix material will ultimately determine the rate of drug release since the physical properties (solubility, viscosity, and more) of the material control both fluid ingress and disintegration of the dosage form. The bulk properties (powder flow, concentration, and more) of the material should also be considered since these properties will influence the ability of the material to be successfully manufactured. Furthermore, there is a limited number of approved materials for the production of solid dosage forms...
April 2, 2018: Pharmaceutics
https://www.readbyqxmd.com/read/29614431/3d-cell-printing-of-in-vitro-stabilized-skin-model-and-in-vivo-pre-vascularized-skin-patch-using-tissue-specific-extracellular-matrix-bioink-a-step-towards-advanced-skin-tissue-engineering
#18
Byoung Soo Kim, Yang Woo Kwon, Jeong-Sik Kong, Gyu Tae Park, Ge Gao, Wonil Han, Moon-Bum Kim, Hyungseok Lee, Jae Ho Kim, Dong-Woo Cho
3D cell-printing technique has been under spotlight as an appealing biofabrication platform due to its ability to precisely pattern living cells in pre-defined spatial locations. In skin tissue engineering, a major remaining challenge is to seek for a suitable source of bioink capable of supporting and stimulating printed cells for tissue development. However, current bioinks for skin printing rely on homogeneous biomaterials, which has several shortcomings such as insufficient mechanical properties and recapitulation of microenvironment...
March 23, 2018: Biomaterials
https://www.readbyqxmd.com/read/29613763/generalized-3d-printing-of-graphene-based-mixed-dimensional-hybrid-aerogels
#19
Xingwei Tang, Han Zhou, Zuocheng Cai, Dongdong Cheng, Peisheng He, Peiwen Xie, Di Zhang, Tongxiang Fan
Graphene-based mixed-dimensional materials hybridization is important for a myriad of applications. However, conventional manufacturing techniques face critical challenges in producing arbitrary geometries with programmable features, continuous interior networks, and multimaterials homogeneity. Here we propose a generalized three-dimensional (3D) printing methodology for graphene aerogels and graphene-based mixed-dimensional (2D + nD, where n is 0, 1, or 2) hybrid aerogels with complex architectures, by the development of hybrid inks and printing schemes to enable mix-dimensional hybrids printability, overcoming the limitations of multicomponents inhomogeneity and harsh post-treatments for additives removal...
April 5, 2018: ACS Nano
https://www.readbyqxmd.com/read/29601901/3d-printing-porosity-a-new-approach-to-creating-elevated-porosity-materials-and-structures
#20
A E Jakus, N R Geisendorfer, P L Lewis, R N Shah
We introduce a new process that enables the ability to 3D-print high porosity materials and structures by combining the newly introduced 3D-Painting process with traditional salt-leaching. The synthesis and resulting properties of three 3D-printable inks comprised of varying volume ratios (25:75, 50:50, 70:30) of CuSO4 salt and polylactide-co-glycolide (PLGA), as well as their as-printed and salt-leached counterparts, are discussed. The resulting materials are comprised entirely of PLGA (F-PLGA), but exhibit porosities proportional to the original CuSO4 content...
March 27, 2018: Acta Biomaterialia
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