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Wonseok Kim, Sungmin Park, Kihong Kim, Sung Jae Kim
While the ion concentration polarization (ICP) phenomenon has been intensively researched for the last decade, a complete picture of ion and analyte distributions near nanoporous membranes is strongly desired, not only for fundamental nano-electrokinetic studies but also for the development of lab-on-a-chip applications. Since direct concentration measurements, using either time-consuming collection or microelectrodes, are limited due to low throughput (<nL min(-1) in typical micro/nanofluidic device) and Faradaic reactions, respectively, we measured the concentration changes of prefilled solutions in individual reservoirs in this work...
October 12, 2017: Lab on a Chip
Pritesh Gokhale, Dana Mitra, Enrico Sowade, Kalyan Mitra, Henrique L Gomes, Eloi Ramon, Ammar Al-Hamry, Olfa Kanoun, Reinhard R Baumann
During the last years, intense pulsed light (IPL) processing has been employed and studied intensively for the drying and sintering of metal nanoparticle layers deposited by means of printing methods on flexible polymer substrates. IPL was found to be a very fast and substrate-gentle approach qualified for the field of flexible and large-area printed electronics, i.e. manufactured via roll-to-roll (R2R) processing. In this contribution, IPL is used for the fine-patterning of printed silver nanoparticle layers...
October 10, 2017: Nanotechnology
Changting Wei, Jinyong Zhuang, Dongyu Zhang, Wenrui Guo, Dongfang Yang, Zhong-Zhi Xie, Jian-Xin Tang, Wenming Su, Haibo Zeng, Zheng Cui
Film morphology plays a crucial role in the performance of multi-layered organic light emitting diodes (OLEDs), while there is little reported literature from the angle of molecular level to investigate the impact on film-forming ability and device performance. In this work, four isomeric cross-linkable electron transport materials constructed with pyridine, 1,2,4-triazole and vinylbenzyl ether groups were developed for inkjet-printed OLEDs . Their lowest unoccupied molecular orbital (LUMO: 3.20 eV) and highest occupied molecular orbital (HOMO: 6...
October 10, 2017: ACS Applied Materials & Interfaces
Poonam Sundriyal, Shantanu Bhattacharya
Printed electronics is widely gaining much attention for compact and high performance energy storage devices due to 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)...
October 9, 2017: ACS Applied Materials & Interfaces
Chin Siang Ong, Pooja Yesantharao, Chen Yu Huang, Gunnar Mattson, Joseph Boktor, Takuma Fukunishi, Huaitao Zhang, Narutoshi Hibino
Recent advances have allowed for three-dimensional (3D) printing technologies to be applied to biocompatible materials, cells and supporting components, creating a field of 3D bioprinting that holds great promise for artificial organ printing and regenerative medicine. At the same time, stem cells, such as human induced pluripotent stem cells, have driven a paradigm shift in tissue regeneration and the modeling of human disease, and represent an unlimited cell source for tissue regeneration and the study of human disease...
October 6, 2017: Pediatric Research
Yuanjing Lin, Yuan Gao, Zhiyong Fan
Planar supercapacitors with high flexibility, desirable operation safety, and high performance are considered as attractive candidates to serve as energy-storage devices for portable and wearable electronics. Here, a scalable and printable technique is adopted to construct novel and unique hierarchical nanocoral structures as the interdigitated electrodes on flexible substrates. The as-fabricated flexible all-solid-state planar supercapacitors with nanocoral structures achieve areal capacitance up to 52.9 mF cm(-2) , which is 2...
October 5, 2017: Advanced Materials
Andrea Alice Konta, Marta García-Piña, Dolores R Serrano
The interindividual variability is an increasingly global problem when treating patients from different backgrounds with diverse customs, metabolism, and necessities. Dose adjustment is frequently based on empirical methods, and therefore, the chance of undesirable side effects to occur is high. Three-dimensional (3D) Printed medicines are revolutionsing the pharmaceutical market as potential tools to achieve personalised treatments adapted to the specific requirements of each patient, taking into account their age, weight, comorbidities, pharmacogenetic, and pharmacokinetic characteristics...
September 22, 2017: Bioengineering
Giovanny F Acosta-Vélez, Chase S Linsley, Madison C Craig, Benjamin M Wu
Novel strategies are required to manufacture customized oral solid dosage forms for personalized medicine applications. 3D Pharming, the direct printing of pharmaceutical tablets, is an attractive strategy, since it allows for the rapid production of solid dosage forms containing custom drug dosages. This study reports on the design and characterization of a biocompatible photocurable pharmaceutical polymer for inkjet 3D printing that is suitable for hydrophilic active pharmaceutical ingredients (API). Specifically, hyaluronic acid was functionalized with norbornene moieties that, in the presence of poly(ethylene) glycol dithiol, Eosin Y as a photoinitiator, and a visible light source, undergoes a rapid step-growth polymerization reaction through thiol-ene chemistry...
January 28, 2017: Bioengineering
Honglong Ning, Yicong Zhou, Zhiqiang Fang, Rihui Yao, Ruiqiang Tao, Jianqiu Chen, Wei Cai, Zhennan Zhu, Caigui Yang, Jinglin Wei, Lei Wang, Junbiao Peng
Inkjet-printed silver gate electrode with low electrical resistivity was fabricated by UV curing method. By adjusting the UV curing time and the distance between the samples and UV lamp, the effects of UV curing conditions on the electrical resistivity of the silver films were studied, and the lowest electrical resistivity of 6.69 × 10(-8) Ω·m was obtained. Besides, the UV-cured silver films have good adhesion to the glass substrates, with adhesion strength of 4B (ASTM international standard). Our work offered an easy and low temperature approach to fabricate inkjet-printed silver electrodes with low electrical resistivity...
September 25, 2017: Nanoscale Research Letters
Hany Anany, Lubov Brovko, Noha K El Dougdoug, Jennifer Sohar, Heather Fenn, Nada Alasiri, Tarik Jabrane, Patrice Mangin, M Monsur Ali, Balamurali Kannan, Carlos D M Filipe, Mansel W Griffiths
Foodborne pathogens are a burden to the economy and a constant threat to public health. The ability to rapidly detect the presence of foodborne pathogens is a vital component of any strategy towards establishing a safe and secure food supply chain. Bacteriophages (phages) are viruses capable of infecting and replicating within bacteria in a strain-specific manner. The ubiquitous and selective nature of phages makes them ideal for the detection and biocontrol of bacteria. Therefore, the objective of this research was to develop and test a phage-based paper dipstick biosensor for the detection of various foodborne pathogens in food matrices...
September 22, 2017: Analytical and Bioanalytical Chemistry
John A Hondred, Loreen R Stromberg, Curtis L Mosher, Jonathan C Claussen
Solution-phase printing of nanomaterial-based graphene inks are rapidly gaining interest for fabrication of flexible electronics. However, scalable manufacturing techniques for high-resolution printed graphene circuits are still lacking. Here, we report a patterning technique [i.e., inkjet maskless lithography (IML)] to form high-resolution, flexible, graphene films (line widths down to 20 μm) that significantly exceed the current inkjet printing resolution of graphene (line widths ∼60 μm). IML uses an inkjet printed polymer lacquer as a sacrificial pattern, viscous spin-coated graphene, and a subsequent graphene lift-off to pattern films without the need for prefabricated stencils, templates, or cleanroom technology (e...
September 29, 2017: ACS Nano
Bing He, Sucui Yang, Zhangrong Qin, Binghai Wen, Chaoying Zhang
This paper describes a lattice Boltzmann-based binary fluid model for inkjet printing. In this model, a time-dependent driving force is applied to actuate the droplet ejection. As a result, the actuation can be accurately controlled by adjusting the intensity and duration of the positive and negative forces, as well as the idle time. The present model was verified by reproducing the actual single droplet ejection process captured by fast imaging. This model was subsequently used to investigate droplet formation in piezoelectric inkjet printing...
September 19, 2017: Scientific Reports
Patrick W Fedick, Brandon J Bills, Nicholas E Manicke, R Graham Cooks
Sample preparation is the most common bottleneck in the analysis and processing of forensic evidence. Time-consuming steps in many forensic tests involve complex separations, such as liquid and gas chromatography or various types of extraction techniques, typically coupled with mass spectrometry (e.g., LC-MS). Ambient ionization ameliorates these slow steps by reducing or even eliminating sample preparation. While some ambient ionization techniques have been adopted by the forensic community, there is significant resistance to discarding chromatography as most forensic analyses require both an identification and a confirmation technique...
October 3, 2017: Analytical Chemistry
(no author information available yet)
No abstract text is available yet for this article.
September 26, 2017: Proceedings of the National Academy of Sciences of the United States of America
Yung-Da Chiu, Chao-Wei Wu, Chia-Chin Chiang
In this study, we propose a tilted fiber Bragg grating (TFBG) humidity sensor fabricated using the phase mask method to produce a TFBG that was then etched with five different diameters of 20, 35, 50, 55 and 60 μm, after which piezoelectric inkjet technology was used to coat the grating with graphene oxide. According to the experimental results, the diameter of 20 μm yielded the best sensitivity. In addition, the experimental results showed that the wavelength sensitivity was -0.01 nm/%RH and the linearity was 0...
September 15, 2017: Sensors
Jacques Lefebvre, Jianfu Ding, Zhao Li, Paul Finnie, Gregory Lopinski, Patrick R L Malenfant
Semiconducting single-walled carbon nanotubes (sc-SWCNTs) are emerging as a promising material for high-performance, high-density devices as well as low-cost, large-area macroelectronics produced via additive manufacturing methods such as roll-to-roll printing. Proof-of-concept demonstrations have indicated the potential of sc-SWCNTs for digital electronics, radiofrequency circuits, radiation hard memory, improved sensors, and flexible, stretchable, conformable electronics. Advances toward commercial applications bring numerous opportunities in SWCNT materials development and characterization as well as fabrication processes and printing technologies...
September 13, 2017: Accounts of Chemical Research
Aleksander Matavž, Vid Bobnar, Barbara Malic
The surface properties of a substrate are among the most important parameters in the printing technology of functional materials, determining not only the printing resolution but also the stability of the printed features. This paper addresses the wetting difficulties encountered during inkjet printing on homogeneous substrates as a result of improper surface properties. We show that the wetting of a substrate and, consequently, the quality of the printed pattern, can be mediated through the deposition of polymeric layers that are a few nanometers thick...
September 12, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
Joseph P Vanderburgh, Shanik J Fernando, Alyssa R Merkel, Julie A Sterling, Scott A Guelcher
3D printing enables the creation of scaffolds with precisely controlled morphometric properties for multiple tissue types, including musculoskeletal tissues such as cartilage and bone. Computed tomography (CT) imaging has been combined with 3D printing to fabricate anatomically scaled patient-specific scaffolds for bone regeneration. However, anatomically scaled scaffolds typically lack sufficient resolution to recapitulate the <100 micrometer-scale trabecular architecture essential for investigating the cellular response to the morphometric properties of bone...
September 11, 2017: Advanced Healthcare Materials
Muhammad Usman Memon, Sungjoon Lim
The significant improvements observed in the field of bulk-production of printed microchip technologies in the past decade have allowed the fabrication of microchip printing on numerous materials including organic and flexible substrates. Printed sensors and electronics are of significant interest owing to the fast and low-cost fabrication techniques used in their fabrication. The increasing amount of research and deployment of specially printed electronic sensors in a number of applications demonstrates the immense attention paid by researchers to this topic in the pursuit of achieving wider-scale electronics on different dielectric materials...
September 9, 2017: Sensors
Jue Hou, Mingzhu Li, Yanlin Song
Colloidal photonic crystals (PCs) have been well developed because they are easy-to-prepare, cost-effective, and versatile to be modified and functionalized. Patterned colloidal PCs contributes a novel approach to constructing high-performance PC devices with unique structures and specific functions. In this review, an overview of the strategies for fabricating patterned colloidal PCs, including patterned substrate induced assembly, inkjet printing, and selective immobilization and modification is presented...
September 11, 2017: Angewandte Chemie
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