A high-performance relative humidity (RH) sensor based on a micro-nano fiber Bragg grating (MFBG) coated with graphene oxide (GO) film is fabricated chemical corrosion technique and optically driven deposition method. The diameter of MFBG corroded to about 12 µm. GO the thickness 2.5 µm uniformly surface. change RH results in refractive index (RI) film, that is, effective RI MFBG, which will at last result shift reflected wavelength. experimental show there good linear relationship between...

Multifunctional surfactants hold great potentials in catalysis, separation, and biomedicine. Highly active plasmonic-magnetic nanosurfactants are developed through a novel acid activation treatment of Au–Fe3O4 dumbbell nanocrystals. The step significantly boosts nanosurfactant surface energy enables the strong adsorption at interfaces, which reduces interfacial one order magnitude. Mediated emulsion further constructed into free-standing hierarchical structures, including capsules, inverse...

Abstract Methyl Phenyl and diphenyl silicone rubbers were synthesized from octamethyl cyclotetrasiloxane (D 4 ), methylphenyl cyclosiloxane, octaphenyl cyclotetrasiloxane, etc. Compared with the commercial methylvinyl rubber, high low temperature resistances of methyl vinyl rubber studied in this paper. The results showed that introduction phenyl groups can improve thermal properties stability is better than rubber. But there little difference mechanical environment for three DMTA analysis...

The present study aimed to establish an exact comprehension of the subsurface damage patterns generated during rotary ultrasonic machining (RUM) glass BK7 process. First, specimens produced with and without using three different diamond tools was compared characterized by means bonded interface sectioning technique. Then, RUM scratching tests were conducted on polished specimen surfaces two investigate formation mechanisms involved in formal characteristics scratches investigated respect...

The numerous unique advantages afforded by rotary ultrasonic machining have led to its extensive utilization in hard–brittle materials. However, the material removal mechanisms are still not very clear, leaving many uncertainties of machined components practical application. In this research, machining/scratching tests had been undertaken on optical glass K9 with diamond tools under various process parameters. Surface morphologies were characterized using a measuring microscope, white-light...

Metal additive manufacturing plays a vital role in new generations of manufacturing. As one the most used alloys, field's metal can be many applications such as mold fabrication, radiation shielding, and more. This research demonstrates ability to fabricate functional parts using alloy at micron level. With good thermal conductivity low negative expansion coefficient, printing temperatures speed are mapped for single layer given nozzle size width height performance stability optimization....

Developing self-healing silicone elastomers are highly significant because of their promising applications. Herein, we present novel disulfide-linked (SEs) based on thiol-terminated sulfur-containing heterochain polysiloxanes (P-SHs) and three thiol-containing crosslinkers, including pentaerythritol tetrakis(β-mercaptopropionate) (PETMP), octa(3-mercaptopropyl)silsesquioxane (POSS-SH), poly[(mercaptopropyl)methylsiloxane] (PMMS), via the thiol oxidation coupling reactions. The construction...

A passively Q-switched mode-locked ytterbium-doped fiber laser (QMYDFL) at 1084.4 nm using ferroferric-oxide (Fe 3 O 4 ) nanoparticles (FONPs) as the saturable absorber (SA) is reported. The FONPs SA exhibits a large nonlinear absorption property with modulation depth of 6.6% wavelength 1µm band. Stable pulse train repetition rate increasing from 5.43 kHz to 59 kHz, corresponding duration reducing 18 µs 2.68 are achieved when input pump power increases 100 mW 330 mW. maximum single energy...

The current fabrication methods for micro and nano scale Polydimethylsiloxane (PDMS) devices either require high environmental conditions or sophisticated procedures at cost. Electrohydrodynamic inkjet (EHD) printing is a potential method to effectively fabricate PDMS because EHD environment-friendly, low-cost, compatible various inks, most importantly, resolution. However, little research has been conducted study of PDMS-based ink. In this paper, investigated. effects several critical...

In this work, molecular dynamics simulations are performed to investigate the influence of material properties on nanometric cutting single crystal copper and aluminum with a diamond tool. The atomic interactions in two metallic materials modeled by sets embedded atom method (EAM) potential parameters. Simulation results show that although plastic deformation is achieved dislocation activities, behavior related physical phenomena, such as machining forces, machined surface quality, chip...

The voltage hold-off capability of 95% alumina insulator in vacuum is usually less than that a similar-sized gap and also far below its dielectric breakdown strength, due to low surface flashover strength. In this work, bulk doping was taken into consideration modify the hope improve insulating property satisfying results were achieved. as-blended powder selected as initial be doped with oxides combination such MnCO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...

In the present work, we investigate minimum wear depth of single crystalline Cu(111) under asperity friction by means molecular dynamics simulations. The atomistic mechanisms governing incipient plasticity are elucidated characterizing specific defect structures and correlated to observed mechanical frictional responses material. Furthermore, effect probe radius on process is studied. Our simulations indicate that formation impression closely associated with nucleation equivalent critical...

A tunable mode-locked erbium-doped fiber laser with a digital micro-mirror device (DMD) as the wavelength tuner and nonlinear amplifying loop mirror is proposed experimentally demonstrated. The pulse center of 1538-1565 nm continuously achieved. average power output 1.028 mW, repetition frequency 1.7 MHz, duration 616 fs, single energy 0.6 nJ. By controlling DMD, can be fine-tuned tuning accuracy 0.07 nm. With increase pump power, traditional soliton transformed into noise-like (NLP), NLP...

Phosphorus chemicals control key aspects of eutrophication and other environmental process. Hypophosphite (HP) originating from manmade natural sources was evidenced as present in the environment investigated rarely. Recently, iron oxide has been used a catalyst for oxidising organic contaminants with hydrogen peroxide (i.e. heterogeneous Fenton-like reaction). This study focused mainly on oxidation 1.0 mM HP by presence novel (B1 catalyst) which prepared through fluidised-bed Fenton reactor...

Recently, increasing numbers of researchers are becoming interested in 3D bioprinting because it provides customizability and structural complexity, which is difficult for traditional subtractive manufacturing to achieve. One the most critical factors material. Depending on bio-applications, materials should be bio-inert or bio-active, non-toxic, along with those characteristics, mechanical properties also meet applicational requirement. As previously validated bioprinting, carboxymethyl...

The research progress of heat resistance, cold electrical conductivity and damping properties aviation silicone rubber were reviewed in this article. resistance can be enhanced by changing the molecular structure (main chain, end-group, side chain weight) gum adding special heat-resistance filler. adjusting content different chain. improved optimizing, blending dispersing conductive particles. property designing synthesizing high-molecular polysiloxane agent. Furthermore, application used...