Flexible electrodes have broad applications in microelectronics. In this work, flexible were fabricated through chemically induced joining of silver nanoparticles at room temperature. After the process, resistance track decreased by 8 orders magnitude. The parameters systematically investigated including concentration chemical solution, sintering time, and drying This method achieved same effect temperature as compared to methods using thermal sintering. changes microstructure surface...

Flexible electrodes have attracted much attention in consumer electronic applications. In this work, laser direct writing is used to fabricate copper/graphene composite on a flexible substrate one step. This process with low power can reduce copper ions thin films form nanomaterials and spontaneously interconnect them gain good conductivity, while the also induces growth of multi-layer graphene that coats improve oxidation resistance electrodes. The electrical performance chemical...

Transparent and flexible electrodes on cost effective plastic substrates for wearable electronics have attract great attention recently. Due to the conductivity flexibility in network form, metal nanowire is regarded as one of most promising candidates electrode fabrication. Prior application, low temperature joining processes are required reduce resistance simultaneously maintain dimensionality uniformity those nanowires. In present work, we presented an innovative, robust method minimize...

To enhance welding quality and performance, preheating post-heating are usually employed on high-temperature materials, concurrently with welding. This is a novel technique in vacuum chamber electron beam (EBW). TC17 Ti2AlNb alloys the hot topics aero-engine parts, of dissimilar materials also broad prospect. settle cracks Ti2AlNb, EBW was investigated alloy, which improved manufacturing technology materials. The joint no longer had after preheating, exhibited excellent stability...

With quantum Bloch equations and sodium cell based experiment, we systematically resolved optical repumping mechanism of atoms, a path to brighter laser guide star (SLGS) that would be accepted by worldwide observatories. Besides the former studies, detailed population distribution atoms with without repumping, which makes easy understand. Experimental results on buffer gas free single frequency implies optimum offset is 1712 MHz, power fraction should 10-18%. The light intensity depended...

Adaptive Optics (AO) based on artificial beacons is the key to achieve high resolution images from large ground-based telescopes. Long pulsed lasers are preferable create sodium laser guide stars (LGS) as they allow for Rayleigh blanking. However, these may increase effective light intensity irradiated at layer, which lead transition saturation, and then decline normalized return flux efficiency. The might be boosted by optical repumping, could make full use of advantages pumping without...

Electron beam welding (EBW) with multiple beams is a new technology simultaneous preheating or postheating, which contributes to reducing residual stresses. To improve corrosion resistance in marine, EBW employed on AF1410 steel. The weld uniform, width of 7.3–8.4 mm, wider than that conventional welding. evaluate susceptibility stress cracking (SCC), the stresses and slow strain rate tests (SSRT) are studied. longitudinal front postheating 25% 15% lower transversal also, respectively,...

By using the return flux enhancement factor due to repumping, spin-damping time of mesospheric sodium can be estimated. Because absolute photon number does not need measured, this method is independent abundance. An example how find given. As a result, it shown that sensitive and has potential improve precision estimations sodium. Finally, impact geomagnetic field on analyzed.

Sodium laser guide star (LGS) is the key for success of modern adaptive optics (AO) supported large ground based telescopes, however, many field applications, LGS's brightness still a limited factor. Large amounts theoretical efforts have been paid to optimize LGS exciting parameters, that is, fully discover potential harsh environment surrounding mesospheric extreme thin sodium atoms under resonant excitation, whether quantum or Monte Carlo based. But till now, only proposals are...

The relatively weak fatigue property of electron beam (EB)‐welded joints is one the key issues restricting their wide application. Herein, impact accelerating voltage, specifically process‐induced nonuniform microstructure, investigated on high‐cycle properties 15CrMnMoVA steel EB‐welded joints. It indicated in results that increasing voltage from 120 to 150 kV (150‐specimen) a longer life and an 11.8% improvement limit for welded joint with locking bottom structure. However, even after...

Abstract The log-derivative (LOGD) and renormalized Numerov (RN) methods are popularly used in inelastic reactive scattering calculations. computational precision of two their improved versions compared two-body diatomic bimolecular collisions at low temperatures. In 40 K- 133 Cs collision example the single-channel calculations show solution-improved RN method has advantage over others when large fixed propagating interval used. relative error local length different sectors explored....

An optical parameter oscillator base on KTP nonlinear crystals and a frequency doubling Nd:YAG lase was built. The wavelength of the signal light could be tuned from 750-800nm. At 780.2nm it provide 62mJ each pulse with duration 14 ns spectrum (FWHM) about 0.4nm, at 755nm energy 10mJ 8ns. When passed through 10cm long Rb cell Ar buffer gas temperature 120°C 779nm to 781nm, observed that fluorescence in changed dim clear first then declined. Fluorescence also when heated 180℃. Which indicated...