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Next-generation stretchable optoelectronics require functional electric conductors with mechanical stretchability and optical transparency. We present a new class of highly stretchable and transparent conductors based on silver nanowire (AgNW) percolation microgrids embedded in an elastomeric substrate. These are prepared by simple spray-coating and subsequent adhesive-tape-assisted contact-removal of the AgNWs. The synergetic combination of the percolated NWs and regular micro-grid geometry in an integrated form makes it possible to achieve uniform, reproducible, and predictable performance of the resulting AgNW microgrids and ensure good stretchability. The fabricated device shows superior optoelectronic performance with a sheet resistance of 26.1 Ω/sq and an optical transmittance of 85.8 %. In addition, the device can reversibly accommodate various mechanical deformations, such as stretching, bending, and twisting. Graphical AbstractA new class of highly stretchable and transparent conductor based on silver nanowire (AgNW) percolation micro-grids prepared by spray-coating and subsequent adhesive-tape-assisted contact removal of AgNWs is presented.

We describe a simple, precise and scalable micropatterning approach of conductive nanomaterials (CNs) based on a synergetic combination of lift-off process and wet coating of CNs.

IntroductionHypertension is a significant risk factor for cardiovascular disease (CVD). The majority of patients, however, cannot easily maintain a healthy blood pressure. Therefore, lifestyle modifications are important and may include getting enough sleep. The purpose of this study was to determine the relationship between sleep duration and hypertension, as defined by the Joint National Committee (JNC) 7 and JNC 8 guidelines.MethodsWe used the data from 6,365 individuals aged ≥ 18 years based on national data from a representative sample of the 5th Korea National Health and Nutrition Examination Survey V-3 in 2012. The participants were divided into three categories: JNC 7, JNC 8, and newly excluded only. The duration of sleep was classified as less than 5, 6, 7, 8, or more than 9 hours.ResultsCompared with the appropriate sleep duration of 7 hours, with a sleep duration of less than 5 hours, the recommended pharmacological treatment of hypertension rate increased 1.908-fold (95% CI = 1.483-2.456) according to the JNC 8 guidelines and 1.864-fold (95% CI = 1.446-2.403) according to the JNC 7 guidelines. However, there was no statistical difference with the other sleep categories.DiscussionThe recommended hypertension treatment rate increased significantly in the less than 5 hours sleep group according to the JNC 8 guidelines. To manage hypertension effectively, it may be useful to maintain a lifestyle of sleeping more than 6 hours.