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https://www.readbyqxmd.com/read/29149531/solution-adsorption-formation-of-a-%C3%AF-conjugated-polymer-graphene-composite-for-high-performance-field-effect-transistors
#1
Yun Liu, Wei Hao, Huiying Yao, Shuzhou Li, Yuchen Wu, Jia Zhu, Lei Jiang
Semiconducting polymers with π-conjugated electronic structures have potential application in the large-scale printable fabrication of high-performance electronic and optoelectronic devices. However, owing to their poor environmental stability and high-cost synthesis, polymer semiconductors possess limited device implementation. Here, an approach for constructing a π-conjugated polymer/graphene composite material to circumvent these limitations is provided, and then this material is patterned into 1D arrays...
November 17, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29144426/experimental-exploration-of-metal-cable-as-reinforcement-in-3d-printed-concrete
#2
Freek P Bos, Zeeshan Y Ahmed, Evgeniy R Jutinov, Theo A M Salet
The Material Deposition Method (MDM) is enjoying increasing attention as an additive method to create concrete mortar structures characterised by a high degree of form-freedom, a lack of geometrical repetition, and automated construction. Several small-scale structures have been realised around the world, or are under preparation. However, the nature of this construction method is unsuitable for conventional reinforcement methods to achieve ductile failure behaviour. Sometimes, this is solved by combining printing with conventional casting and reinforcing techniques...
November 16, 2017: Materials
https://www.readbyqxmd.com/read/29128598/histological-and-radiological-evaluation-of-subcutaneous-implants-in-mouse-of-a-3d-printable-material-fulcure-720-and-experimental-application-in-mandibular-reconstruction
#3
J Megías Barrera, L García-Consuegra, A Novoa, S Costilla, S Junquera, G Ascani
INTRODUCTION: The aim of this study was to evaluate the bioactivity of FullCure compared to porous polyethylene implants (Medpor) in rats prior to custom-made scaffold support manufacturing for mandible segmental defects (MSD) reconstruction in sheep. METHODS: 12 Fullcure and Medpor laminaes were implanted in the left and right dorsum respectively of 6 wistar rats. Toxicity was assessed by skin, kidney and liver histopathology 3 months post-implantation. Computed Tomography (CT) was carried out in order to assess radiological differences between implants...
November 8, 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29110921/3d-printed-versus-conventionally-cured-provisional-crown-and-bridge-dental-materials
#4
Anthony Tahayeri, MaryCatherine Morgan, Ana P Fugolin, Despoina Bompolaki, Avathamsa Athirasala, Carmem S Pfeifer, Jack L Ferracane, Luiz E Bertassoni
OBJECTIVES: To optimize the 3D printing of a dental material for provisional crown and bridge restorations using a low-cost stereolithography 3D printer; and compare its mechanical properties against conventionally cured provisional dental materials. METHODS: Samples were 3D printed (25×2×2mm) using a commercial printable resin (NextDent C&B Vertex Dental) in a FormLabs1+ stereolithography 3D printer. The printing accuracy of printed bars was determined by comparing the width, length and thickness of samples for different printer settings (printing orientation and resin color) versus the set dimensions of CAD designs...
October 27, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29095247/spanish-language-pelvic-floor-disorders-patient-information-handouts-how-readable-are-they
#5
James Robb, Alex Mackay, Nancy Rondeau, Javier Palomino, Zuber D Mulla, T Ignacio Montoya, Veronica T Mallett
OBJECTIVE: This study aimed to determine the readability of commonly available patient information materials for pelvic floor disorders written in Spanish and compare their readability based on type of content and source. METHODS: Spanish patient information handouts, including pamphlets from the National Institutes of Health, International Urogynecology Association, American Congress of Obstetricians and Gynecologists, online printable handouts, and industry-sponsored brochures were assessed for readability...
October 31, 2017: Female Pelvic Medicine & Reconstructive Surgery
https://www.readbyqxmd.com/read/29089491/conversion-of-invisible-metal-organic-frameworks-to-luminescent-perovskite-nanocrystals-for-confidential-information-encryption-and-decryption
#6
Congyang Zhang, Bo Wang, Wanbin Li, Shouqiang Huang, Long Kong, Zhichun Li, Liang Li
Traditional smart fluorescent materials, which have been attracting increasing interest for security protection, are usually visible under either ambient or UV light, making them adverse to the potential application of confidential information protection. Herein, we report an approach to realize confidential information protection and storage based on the conversion of lead-based metal-organic frameworks (MOFs) to luminescent perovskite nanocrystals (NCs). Owing to the invisible and controlled printable characteristics of lead-based MOFs, confidential information can be recorded and encrypted by MOF patterns, which cannot be read through common decryption methods...
October 31, 2017: Nature Communications
https://www.readbyqxmd.com/read/29081051/bioprinting-and-biofabrication-with-peptide-and-protein-biomaterials
#7
Mitchell Boyd-Moss, Kate Fox, Milan Brandt, David Nisbet, Richard Williams
The ability to fabricate artificial tissue constructs through the controlled organisation of cells, structures and signals within a biomimetic scaffold offers significant promise to the field of regenerative medicine, drug delivery and tissue engineering. Advances in additive manufacturing technologies have facilitated the printing of spatially defined cell-laden artificial tissue constructs capable of providing biomimetic spatiotemporal presentation of biological and physical cues to cells in a designed multicomponent structure...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29068193/biomimetic-inks-based-on-cellulose-nanofibrils-and-cross-linkable-xylans-for-3d-printing
#8
Kajsa Markstedt, Alfredo Escalante, Guillermo Toriz, Paul Gatenholm
This paper presents a sustainable all-wood-based ink which can be used for 3D printing of constructs for a large variety of applications such as clothes, furniture, electronics, and health care products with a customized design and versatile gel properties. The 3D printing technologies where the material is dispensed in the form of liquids, so called inks, have proven suitable for 3D printing dispersions of cellulose nanofibrils (CNFs) because of their unique shear thinning properties. In this study, novel inks were developed with a biomimetic approach where the structural properties of cellulose and the cross-linking function of hemicelluloses that are found in the plant cell wall were utilized...
November 7, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29065226/inkjet-printed-nanocavities-on-a-photonic-crystal-template
#9
Frederic S F Brossard, Vincenzo Pecunia, Andrew J Ramsay, Jonathan P Griffiths, Maxime Hugues, Henning Sirringhaus
The last decade has witnessed the rapid development of inkjet printing as an attractive bottom-up microfabrication technology due to its simplicity and potentially low cost. The wealth of printable materials has been key to its widespread adoption in organic optoelectronics and biotechnology. However, its implementation in nanophotonics has so far been limited by the coarse resolution of conventional inkjet-printing methods. In addition, the low refractive index of organic materials prevents the use of "soft-photonics" in applications where strong light confinement is required...
October 24, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29038555/hybrid-printing-metal-mesh-transparent-conductive-films-with-lower-energy-photonically-sintered-copper-tin-ink
#10
Xiaolian Chen, Xinzhou Wu, Shuangshuang Shao, Jinyong Zhuang, Liming Xie, Shuhong Nie, Wenming Su, Zheng Chen, Zheng Cui
With the help of photonic sintering using intensive pulse light (IPL), copper has started to replace silver as a printable conductive material for printing electrodes in electronic circuits. However, to sinter copper ink, high energy IPL has to be used, which often causes electrode destruction, due to unreleased stress concentration and massive heat generated. In this study, a Cu/Sn hybrid ink has been developed by mixing Cu and Sn particles. The hybrid ink requires lower sintering energy than normal copper ink and has been successfully employed in a hybrid printing process to make metal-mesh transparent conductive films (TCFs)...
October 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28991438/inkjet-printed-electrodes-on-a4-paper-substrates-for-low-cost-disposable-and-flexible-asymmetric-supercapacitors
#11
Poonam Sundriyal, Shantanu Bhattacharya
Printed electronics is widely gaining much attention for compact and high-performance energy-storage devices because of the advancement of flexible electronics. The development of a low-cost current collector, selection, and utilization of the proper material deposition tool and improvement of the device energy density are major challenges for the existing flexible supercapacitors. In this paper, we have reported an inkjet-printed solid-state asymmetric supercapacitor on commercial A4 paper using a low-cost desktop printer (EPSON L130)...
November 8, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28990579/bone-matrix-production-in-hydroxyapatite-modified-hydrogels-suitable-for-bone-bioprinting
#12
Annika Wenz, Kirsten Borchers, Günter E M Tovar, Petra Kluger
Though bioprinting is a forward-looking approach in bone tissue engineering, the development of bioinks which are on the one hand processable with the chosen printing technique, and on the other hand possess the relevant mechanical as well as osteoconductive features remains a challenge. In the present study, polymer solutions based on methacrylated gelatin and methacrylated hyaluronic acid modified with hydroxyapatite particles (5 wt%) were prepared. Encapsulation of primary human adipose-derived stem cells in the hydroxyapatite-containing gels and culture for 28 days resulted in a storage moduli significantly increased to126...
October 9, 2017: Biofabrication
https://www.readbyqxmd.com/read/28985047/direct-organization-of-morphology-controllable-mesoporous-sno2-using-amphiphilic-graft-copolymer-for-gas-sensing-applications
#13
Won Seok Chi, Chang Soo Lee, Hu Long, Myoung Hwan Oh, Alex Zettl, Carlo Carraro, Jong Hak Kim, Roya Maboudian
A simple and flexible strategy for controlled synthesis of mesoporous metal oxide films using an amphiphilic graft copolymer as sacrificial template is presented and the effectiveness of this approach for gas-sensing applications is reported. The amphiphilic graft copolymer poly(vinyl chloride)-g-poly(oxyethylene methacrylate) (PVC-g-POEM) is used as a sacrificial template for the direct synthesis of mesoporous SnO2. The graft copolymer self-assembly is shown to enable good control over the morphology of the resulting SnO2 layer...
October 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28976364/assessing-bioink-shape-fidelity-to-aid-material-development-in-3d-bioprinting
#14
Alexandre Ribeiro, Maarten Michiel Blokzijl, Riccardo Levato, Claas Willem Visser, Miguel Castilho, Wim E Hennink, Tina Vermonden, Jos Malda
During extrusion-based bioprinting, the deposited bioink filaments are subjected to deformations, such as collapse of overhanging filaments, which compromises the ability to stack several layers of bioink, and fusion between adjacent filaments, which compromises the resolution and maintenance of a desired pore structure. When developing new bioinks, approaches to assess their shape fidelity after printing would be beneficial to evaluate the degree of deformation of the deposited filament and to estimate how similar the final printed construct would be to the design...
October 4, 2017: Biofabrication
https://www.readbyqxmd.com/read/28948646/a-practical-guide-to-cardiovascular-3d-printing-in-clinical-practice-overview-and-examples
#15
Islam Abudayyeh, Brent Gordon, Mohammad M Ansari, Kenneth Jutzy, Liset Stoletniy, Anthony Hilliard
The advent of more advanced 3D image processing, reconstruction, and a variety of three-dimensional (3D) printing technologies using different materials has made rapid and fairly affordable anatomically accurate models much more achievable. These models show great promise in facilitating procedural and surgical planning for complex congenital and structural heart disease. Refinements in 3D printing technology lend itself to advanced applications in the fields of bio-printing, hemodynamic modeling, and implantable devices...
September 25, 2017: Journal of Interventional Cardiology
https://www.readbyqxmd.com/read/28930091/proposal-to-assess-printability-of-bioinks-for-extrusion-based-bioprinting-and-evaluation-of-rheological-properties-governing-bioprintability
#16
Naomi Claire Paxton, Willi Smolan, Thomas Böck, Ferry P W Melchels, Juergen Groll, Tomasz Juengst
The development and formulation of printable inks for extrusion-based 3D bioprinting has been a major challenge in the field of biofabrication. Inks, often polymer solutions with the addition of crosslinking to form hydrogels, must not only display adequate mechanical properties for the chosen application, but also show high biocompatibility as well as printability. Here we describe a reproducible two-step method for the assessment of the printability of inks for bioprinting, focussing firstly on screening ink formulations to assess fibre formation and the ability to form 3D constructs before presenting a method for the rheological evaluation of inks to characterise the yield point, shear thinning and recovery behaviour...
September 20, 2017: Biofabrication
https://www.readbyqxmd.com/read/28929935/development-of-arginine-glycine-aspartate-immobilized-3d-printed-poly-propylene-fumarate-scaffolds-for-cartilage-tissue-engineering
#17
Chi Bum Ahn, Youngjo Kim, Sung Jean Park, Yongsung Hwang, Jin Woo Lee
Poly(propylene fumarate) (PPF) has known to be a good candidate material for cartilage tissue regeneration because of its excellent mechanical properties during its degradation processes. Here, we describe the potential application of PPF-based materials as 3D printing bioinks to create macroporous cell scaffolds using micro-stereolithography (MSTL). To improve cell-matrix interaction of seeded human chondrocytes within the PPF-based 3D scaffolds, we immobilized arginine-glycine-aspartate (RGD) peptide onto the PPF scaffolds...
September 20, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28914823/hole-transporting-materials-for-printable-perovskite-solar-cells
#18
REVIEW
Paola Vivo, Jagadish K Salunke, Arri Priimagi
Perovskite solar cells (PSCs) represent undoubtedly the most significant breakthrough in photovoltaic technology since the 1970s, with an increase in their power conversion efficiency from less than 5% to over 22% in just a few years. Hole-transporting materials (HTMs) are an essential building block of PSC architectures. Currently, 2,2',7,7'-tetrakis-(N,N'-di-p-methoxyphenylamine)-9,9'-spirobifluorene), better known as spiro-OMeTAD, is the most widely-used HTM to obtain high-efficiency devices. However, it is a tremendously expensive material with mediocre hole carrier mobility...
September 15, 2017: Materials
https://www.readbyqxmd.com/read/28906599/dual-extrusion-3d-printing-of-anatomical-models-for-education
#19
Michelle L Smith, James F X Jones
Two material 3D printing is becoming increasingly popular, inexpensive and accessible. In this paper, freely available printable files and dual extrusion fused deposition modelling were combined to create a number of functional anatomical models. To represent muscle and bone FilaFlex(3D) flexible filament and polylactic acid (PLA) filament were extruded respectively via a single 0.4 mm nozzle using a Big Builder printer. For each filament, cubes (5 mm(3) ) were printed and analyzed for X, Y, and Z accuracy...
September 14, 2017: Anatomical Sciences Education
https://www.readbyqxmd.com/read/28883498/the-mechanical-and-photoelastic-properties-of-3d-printable-stress-visualized-materials
#20
Li Wang, Yang Ju, Heping Xie, Guowei Ma, Lingtao Mao, Kexin He
Three-dimensional (3D) printing technology integrating frozen stress techniques has created a novel way to directly represent and characterize 3D interior discontinuities and the full-field stress induced by mining- or construction-related disturbances of deeply buried rock masses. However, concerns have been raised about the similitude between the mechanical behaviours of the printed model and its prototype rock mass. Ensuring the mechanical properties of the printable materials are as close as possible to those of real rock mass is of critical significance...
September 7, 2017: Scientific Reports
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