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printable material

Anders Fredrik Elfwing, Wanzhu Cai, Liangqi Ouyang, Xianjie Liu, Yuxin Xia, Zheng Tang, Olle Inganäs
A new solution processable electron transport material (ETM) is introduced for use in photovoltaic devices, which consists of a metallic conjugated polyelectrolyte, poly(4-(2,3-dihydrothieno[3,4- b][1,4]dioxin-2-yl-methoxy)-1-butanesulfonic acid (PEDOT-S), and surfactant-functionalized deoxyribonucleic acid (DNA) (named DNA: CTMA: PEDOT-S). This ETM is demonstrated to effectively work for bulk-heterojunction organic photovoltaic devices (OPV) based on different electron acceptor materials. The fill factor, open circuit voltage and the overall power conversion efficiency of the solar cells with a DNA: CTMA: PEDOT-S modified cathode are comparable to that of devices with a traditional Lithium fluoride/Aluminum cathode...
March 5, 2018: ACS Applied Materials & Interfaces
Longyu Li, Pengfei Zhang, Zhiyun Zhang, Qianming Lin, Yuyang Wu, Alexander Cheng, Yunxiao Lin, Christina M Thompson, Ronald A Smaldone, Chenfeng Ke
Integrating intelligent molecular systems into 3D printing materials and transforming their molecular functions to the macroscale with controlled superstructures will unleash the great potential for the development of smart materials. Compared to those macromolecular 3D printing materials, self-assembled small-molecule-based 3D printing materials are very limited due to the difficulties of facilitating 3D printability as well as preserving their molecular functions macroscopically. Here we report a general approach to integrate functional small molecules into direct ink writing 3D printing materials through the introduction of a supramolecular template...
March 5, 2018: Angewandte Chemie
Shanshan Wei, Gang Qu, Guanyi Luo, Yuxing Huang, Huisheng Zhang, Xuechang Zhou, Liqiu Wang, Zhou Liu, Tiantian Kong
Creating complex three-dimensional structures from soft yet durable materials enables advances in fields, such as flexible electronics, regenerating tissue engineering and soft robotics. The tough-hydrogels that mimic the human skin can bear enormous mechanical loads. By employing a spider-inspired biomimetic microfluidic-nozzle, we successfully achieve the continuous-printing of tough-hydrogels into fibers, 2D networks and even 3D structures without compromising its extreme mechanical properties. The resultant thin fibers demonstrate a stretch up to 21 at a water content of 52%, and are intrinsically transparent, biocompatible, and conductive at high stretches...
March 5, 2018: ACS Applied Materials & Interfaces
Rosy Chhabra, Deena J Chisolm, Barbara Bayldon, Maheen Quadri, Iman Sharif, Jessica J Velazquez, Karen Encalada, Angelic Rivera, Millie Harris, Elana Levites-Agababa, H Shonna Yin
BACKGROUND AND OBJECTIVES: Despite recommendations supporting human papillomavirus (HPV) vaccination, pediatric vaccination rates remain suboptimal in the United States; lack of tools to support provider counseling is one barrier. We sought to evaluate HPV-related counseling materials for readability, suitability, and content, and assess parent perceptions of materials, using a health literacy perspective. METHODS: A systematic search was conducted for written materials developed for HPV vaccination counseling by examining state Department of Health Web sites and associated links to local and national organizations...
March 2018: Academic Pediatrics
Cinzia Barberini, Enrica Lavezzini, Daniela Zoboli, Corrado Busani
INTRODUCTION: In the past couple of years, the demand of galenic compounds has risen sharply. In order to plan the activity, our team designed and set up a database which stores all the necessary information related to drugs and ingredients. This allows our internal Galenic Laboratory to better manage the pharmaceutical prescriptions for the hospital and the outpatients, optimizing the use of raw materials. METHODS: The application is based on the interconnection of prescription-related aspects (patients' and prescriber's details and prescription information)...
February 2018: Recenti Progressi in Medicina
Yifei Jin, Yangyang Shen, Jun Yin, Jin Qian, Yong Huang
Stimuli-responsive hydrogels and/or composite hydrogels have been of great interest for various printing applications including four-dimensional (4D) printing. While various responsive hydrogels and/or composite hydrogels have been found to respond to given stimuli and change shapes as designed, the fabrication of three-dimensional (3D) structures from such responsive hydrogels is still a challenge due to their poor 3D printability, and most of responsive material-based patterns are two-dimensional (2D) in nature...
March 1, 2018: ACS Applied Materials & Interfaces
Taeil Kim, Ramita Trangkanukulkij, Woo Soo Kim
Here, we report guided orientation of silver nanowires (AgNWs) in extruded patterns with photo-curable 3D printing technology. A printable conductive composite material composed of polymer matrix and silver nanowires shows significantly varied electrical properties depending on the cross-sectional shape of printing nozzles: flat or circular. The composite is designed to have highly conductive AgNWs and a dielectric polymer matrix like photo-curable methacrylate resin. The dielectric permittivity of photo-curable composite resin with 1...
February 28, 2018: Scientific Reports
Krishna Rajan, Erik Garofalo, Alessandro Chiolerio
A recent trend in the development of high mass consumption electron devices is towards electronic textiles (e-textiles), smart wearable devices, smart clothes, and flexible or printable electronics. Intrinsically soft, stretchable, flexible, Wearable Memories and Computing devices (WMCs) bring us closer to sci-fi scenarios, where future electronic systems are totally integrated in our everyday outfits and help us in achieving a higher comfort level, interacting for us with other digital devices such as smartphones and domotics, or with analog devices, such as our brain/peripheral nervous system...
January 27, 2018: Sensors
Steven D Lacey, Dylan J Kirsch, Yiju Li, Joseph T Morgenstern, Brady C Zarket, Yonggang Yao, Jiaqi Dai, Laurence Q Garcia, Boyang Liu, Tingting Gao, Shaomao Xu, Srinivasa R Raghavan, John W Connell, Yi Lin, Liangbing Hu
A highly porous 2D nanomaterial, holey graphene oxide (hGO), is synthesized directly from holey graphene powder and employed to create an aqueous 3D printable ink without the use of additives or binders. Stable dispersions of hydrophilic hGO sheets in water (≈100 mg mL-1 ) can be readily achieved. The shear-thinning behavior of the aqueous hGO ink enables extrusion-based printing of fine filaments into complex 3D architectures, such as stacked mesh structures, on arbitrary substrates. The freestanding 3D printed hGO meshes exhibit trimodal porosity: nanoscale (4-25 nm through-holes on hGO sheets), microscale (tens of micrometer-sized pores introduced by lyophilization), and macroscale (<500 µm square pores of the mesh design), which are advantageous for high-performance energy storage devices that rely on interfacial reactions to promote full active-site utilization...
January 30, 2018: Advanced Materials
Yue Hu, Zhihui Zhang, Anyi Mei, Youyu Jiang, Xiaomeng Hou, Qifei Wang, Kai Du, Yaoguang Rong, Yinhua Zhou, Gengzhao Xu, Hongwei Han
A bifunctional conjugated organic molecule 4-(aminomethyl) benzoic acid hydroiodide (AB) is designed and employed as an organic cation in organic-inorganic halide perovskite materials. Compared with the monofunctional cation benzylamine hydroiodide (BA) and the nonconjugated bifunctional organic molecule 5-ammonium valeric acid, devices based on AB-MAPbI3 show a good stability and a superior power conversion efficiency of 15.6% with a short-circuit current of 23.4 mA cm-2 , an open-circuit voltage of 0.94 V, and a fill factor of 0...
January 29, 2018: Advanced Materials
Bilal Khatri, Karl Lappe, Dorit Noetzel, Kilian Pursche, Thomas Hanemann
In this work, a 3D printed polymer-metal soft-magnetic composite was developed and characterized for its material, structural, and functional properties. The material comprises acrylonitrile butadiene styrene (ABS) as the polymer matrix, with up to 40 vol. % stainless steel micropowder as the filler. The composites were rheologically analyzed and 3D printed into tensile and flexural test specimens using a commercial desktop 3D printer. Mechanical characterization revealed a linearly decreasing trend of the ultimate tensile strength (UTS) and a sharp decrease in Young's modulus with increasing filler content...
January 25, 2018: Materials
Shikha Chawla, Swati Midha, Aarushi Sharma, Sourabh Ghosh
3D bioprinting field is making remarkable progress; however, the development of critical sized engineered tissue construct is still a farfetched goal. Silk fibroin offers a promising choice for bioink material. Nature has imparted several unique structural features in silk protein to ensure spinnability by silkworms or spider. Researchers have modified the structure-property relationship by reverse engineering to further improve shear thinning behavior, high printability, cytocompatible gelation, and high structural fidelity...
January 23, 2018: Advanced Healthcare Materials
Sophia N Economidou, Dimitrios A Lamprou, Dennis Douroumis
The role of two and three-dimensional printing as a fabrication technology for sophisticated transdermal drug delivery systems is explored in literature. 3D printing encompasses a family of distinct technologies that employ a virtual model to produce a physical object through numerically controlled apparatuses. The applicability of several printing technologies has been researched for the direct or indirect printing of microneedle arrays or for the modification of their surface through drug-containing coatings...
January 17, 2018: International Journal of Pharmaceutics
Dongdong Li, Wen-Yong Lai, Yi-Zhou Zhang, Wei Huang
Printed electronics are an important enabling technology for the development of low-cost, large-area, and flexible optoelectronic devices. Transparent conductive films (TCFs) made from solution-processable transparent conductive materials, such as metal nanoparticles/nanowires, carbon nanotubes, graphene, and conductive polymers, can simultaneously exhibit high mechanical flexibility, low cost, and better photoelectric properties compared to the commonly used sputtered indium-tin-oxide-based TCFs, and are thus receiving great attention...
January 10, 2018: Advanced Materials
Jay M Taylor, Karla Perez-Toralla, Ruby Aispuro, Stephen A Morin
The lamination of mechanically stiff structures to elastic materials is prevalent in biological systems and popular in many emerging synthetic systems, such as soft robotics, microfluidics, stretchable electronics, and pop-up assemblies. The disparate mechanical and chemical properties of these materials have made it challenging to develop universal synthetic procedures capable of reliably adhering to these classes of materials together. Herein, a simple and scalable procedure is described that is capable of covalently laminating a variety of commodity ("off-the-shelf") thermoplastic sheets to silicone rubber films...
January 8, 2018: Advanced Materials
Matthew J Large, Sean P Ogilvie, Manuela Meloni, Aline Amorim Graf, Giuseppe Fratta, Jonathan Salvage, Alice A K King, Alan B Dalton
Pickering emulsions stabilised with nanomaterials provide routes to a range of functional macroscopic assemblies. We demonstrate the formation and properties of water-in-oil emulsions prepared through liquid-phase exfoliation of graphene. Due to the functional nature of the stabiliser, the emulsions exhibit conductivity due to inter-particle tunnelling. We demonstrate a strain sensing application with a large gauge factor of ∼40; the highest reported in a liquid. Our methodology can be applied to other two-dimensional layered materials opening up applications such as energy storage materials, and flexible and printable electronics...
January 9, 2018: Nanoscale
Elizabeth Perica, Zhonghua Sun
Background: Recently, three-dimensional (3D) printing has shown great interest in medicine, and 3D printed models may be rendered as part of the pre-surgical planning process in order to better understand the complexities of an individual's anatomy. The aim of this study is to investigate the feasibility of utilising 3D printed liver models as clinical tools in pre-operative planning for resectable hepatocellular carcinoma (HCC) lesions. Methods: High-resolution contrast-enhanced computed tomography (CT) images were acquired and utilized to generate a patient-specific 3D printed liver model...
December 2017: Quantitative Imaging in Medicine and Surgery
Yan Yang, Huihui Wang, Haichao Li, Zhimin Ou, Gensheng Yang
The object of this study is to prepare and evaluate tablets with predesigned internal scaffold structure using 3D printing to achieve sustained drug release. Model drug (ibuprofen) and sustained release material (ethyl cellulose), together with other excipients, were firstly mixed and extruded into filaments by hot melt extrusion. Then these obtained filaments were printed into tablets by fused deposition modeling. The tablets printability and drug release behavior were influenced by drug content, release modifiers, printing parameters and modeling...
January 3, 2018: European Journal of Pharmaceutical Sciences
Jahan Zeb Gul, Kim Young Su, Kyung Hyun Choi
Bio-mimicking the underwater sensors has tremendous potential in soft robotics, under water exploration and human interfaces. Pinniped are semiaquatic carnivores that use their whiskers to sense food by tracking the vortices left by potential prey. To detect and track the vortices inside the water, a fully 3D printed pinniped inspired multi-material whisker sensor is fabricated and characterized. The fabricated whisker is composed of a polyurethane rod with a length-to-diameter ratio (L/d) of 20:1 with four graphene patterns (length × diameter: 60 × 0...
January 3, 2018: Soft Robotics
Armin Winter, Norbert Mundigler, Julian Holzweber, Stefan Veigel, Ulrich Müller, Adriana Kovalcik, Wolfgang Gindl-Altmutter
Microfibrillated cellulose (MFC) is a fascinating material with an obvious potential for composite reinforcement due to its excellent mechanics together with high specific surface area. However, in order to use this potential, commercially viable solutions to important technological challenges have to be found. Notably, the distinct hydrophilicity of MFC prevents efficient drying without loss in specific surface area, necessitating storage and processing in wet condition. This greatly hinders compounding with important technical polymers immiscible with water...
February 13, 2018: Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
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