The flexible wearable sweat sensor that enables real-time monitoring and noninvasive sampling is emerging as a new focal point in medical healthcare. It represents an ideal choice for analyzing the constituents human to assess individual physiological states potential related diseases. Here, we introduce plasmonic paper-based microfluidic device based on surface-enhanced Raman spectroscopy (SERS) equipped with portable spectrometer continuous situ of sweat. Extensible segmented channels...

One-dimensional graphene superlattice subjected to strong Kronig-Penney (KP) potential is promising for achieving the electron-lensing effect, while previous studies utilizing modulated dielectric gates can only yield a moderate, spatially dispersed profile. Here, we realize high KP modulation of via nanoscale ferroelectric domain gating. Graphene transistors are fabricated on PbZr_{0.2}Ti_{0.8}O_{3} back patterned with periodic, 100-200 nm wide stripe domains. Because band reconstruction,...

Abstract Electrochemical (EC) actuators have garnered significant attention in recent years, yet there are still some critical challenges to limit their application range, such as responsive time, multifunctionality, and actuating direction. Herein, an EC actuator with a back‐to‐back structure is fabricated by stacking two membranes bilayer V 2 O 5 nanowires/single‐walled carbon nanotubes (V NWs/SWCNTs) networks, shows synchronous high actuation amplitude (about ±9.7 mm, ±28.4°) multiple...

The superhydrophilic/underwater superoleophobic MS@PVDF membrane can achieve efficient oil/water separation and dye adsorption, has UV-induced self-cleaning ability.

Fabry–Pérot (F–P) resonators enhance light–matter interactions and are sought to incorporate stable, flexible poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). However, existing additives for PSS phase separation conductivity lack the ability modify optical dielectric properties of PEDOT augmenting resonation. Here, we developed a synergistic strategy that combines electrochemical autooxidized doping with through simple solution mixing polyoxometalates. The approach...

Agilent first proposed using FBAR for CDMA PCS duplexers in 1999. The commercial product was offered 2001. Since then, Agilent's share of duplexer "phone slots" has increased from thousands per month to millions month. number design wins new phones surpassed 60 by Fall 2003 and continues grow. commercialized duplexer, used two die (Rx Tx) packaged into LCC packages then mounted on a small, pc board. next generation uses wafer-scale chip package or "microcap" process. Microcap allows the...

Flexible/soft tactile sensors enable the robotic arms to gain real‐time mechanical responses, which are of utmost importance for future deep learning in sciences and technologies. Learning from nature will inspire advances soft as mother is proficient achieving unique functionality at simplest construction. Herein, fabrication self‐powered reported. The shape flexible mimics Merkel's disks, allowing a well perceptual functionality. Due use magnetoelectric materials, without external power...

Ferroelectric van der Waals CuInP$_2$S$_6$ possesses intriguing quadruple-well states and negative piezoelectricity. Its technological implementation has been impeded by the relatively low Curie temperature (bulk $T_C$ ~42 {\deg}C) lack of precise domain control. Here we show that can be immune to finite size effect exhibits enhanced ferroelectricity, piezoelectricity, polar alignment in ultrathin limit when interfaced with ferroelectric oxide PbZr$_{0.2}$Ti$_{0.8}$O$_3$ films. Piezoresponse...

The incidence of cervical cancer caused by human papillomavirus (HPV) infection has increased in recent years. More than half all cases are due to HPV16 and HPV18 infection, so testing is essential prevent cancer. HPV mainly carried out hospitals, but it subject time specialized medical facilities. On the other hand, home self-testing using simple diagnostics would present an attractive alternative privacy flexibility with regard place, provided sufficient sensitivity specificity can be...

A unique fluid-spinning method was developed to obtain a series of scalable inorganic semiconductor yarns that have not been explored yet, which can large tensile stroke by electrochemical charge injection-associated multicolor switching.

Probing and manipulating the intriguing nonlinear optical responses in van der Waals (vdW) ferroelectrics offer opportunities for their applications nanophotonics. Here, we report observation of giant tunable second-harmonic generation (SHG) ferroelectric CuInP

We report the effects of screening capacity, surface roughness, and interfacial epitaxy bottom electrodes on polarization switching, domain wall (DW) ferroelectric Curie temperature (TC) PbZr0.2Ti0.8O3 (PZT)-based free-standing membranes. Singe crystalline 10-50 nm (001) PZT PZT/La0.67Sr0.33MnO3 (LSMO) membranes are prepared Au, correlated oxide LSMO, two-dimensional (2D) semiconductor MoS2 base layers. Switching yields nonvolatile current modulation in channel at room temperature, with an...

We present results of balanced Rx filters based on thin-film bulk acoustic resonator (FBAR) technology for GSM handset front-end module applications. The filtering is achieved by using a lattice filter topology. hermetically sealed wafer-level packaging with solder bumps each terminal, ready flip-chip assembly. size the less than 1 mm/spl and/2 and height 0.35 mm. typical broadband rejection better 35 dB, in-band insertion loss 2 dB. small good temperature stability make FBAR an ideal choice

Abstract The flexible, transparent, and low‐weight nature of ferroelectric polymers makes them promising for wearable electronic optical applications. To reach the full potential polarization‐enabled device functionalities, large‐scale fabrication polymer thin films with well‐controlled polar directions is called for, which remains a central challenge. widely exploited Langmuir–Blodgett, spin‐coating, electrospinning methods only yield polymorphous or polycrystalline films, where net...

We report the competing effects of disorder pinning and thermal roughening on ferroelectric domain walls as a function temperature in epitaxial $\mathrm{Pb}{\mathrm{Zr}}_{0.2}{\mathrm{Ti}}_{0.8}{\mathrm{O}}_{3}$ thin films deposited (001) $\mathrm{SrTi}{\mathrm{O}}_{3}$ substrates buffered by three types correlated oxide electrodes, ${\mathrm{La}}_{0.67}{\mathrm{Sr}}_{0.33}\mathrm{Mn}{\mathrm{O}}_{3}$, $\mathrm{LaNi}{\mathrm{O}}_{3}$, $\mathrm{SrIr}{\mathrm{O}}_{3}$. Piezoresponse force...

A very attractive CRF (Coupled Resonator Filter) topology is to laterally couple thin film bulk acoustic resonators (FBAR). However, the filter band width narrow because coupling between conventional FBAR weak. The coupling, and thus bandwidth, may be increased by forming pairs of with an inter-digital configuration. Both electrode finger multiple coupled enhance lateral acoustical resulting in filters wider pass band. finite element simulation experimental results on LCRF structures show...

The device concept of ferroelectric-based negative capacitance (NC) transistors offers a promising route for achieving energy-efficient logic applications that can outperform the conventional semiconductor technology, while viable operation mechanisms remain central topic debate. In this work, we report steep slope switching in MoS$_2$ back-gated by single-layer polycrystalline PbZr$_{0.35}$Ti$_{0.65}$O$_3$. devices exhibit current on/off ratios up to 8$\times$10$^6$ within an ultra-low gate...

We report the observation of a magnetocapacitance effect at interface between Ni and epitaxial nonpolar BiInO3 thin films room temperature. A detailed surface study using X-ray photoelectron spectroscopy (XPS) reveals formation an intermetallic Ni-Bi alloy Ni/BiInO3 shift in Bi 4f In 3d core levels to higher binding energies with increasing thickness. The latter infers band bending BiInO3, corresponding p-type Schottky barrier. current-voltage characteristics...

Ionic liquid was used as the pore-forming additive to design structure and properties of PVDF membranes. The crystal structure, morphology wettability membranes investigated by Fourier transform infrared spectrometer (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM) contact angle measurement. results FTIR XRD suggested that ionic could make α phase in pure membrane totally transformed into β via immersion precipitation process. SEM also indicated a good additive, which...

Ferroelectric tunnel junctions (FTJs) based on epitaxial complex oxide heterostructures are promising building blocks for developing low power nanoelectronics and neuromorphic computing. FTJs consisting of correlated electrodes have distinct advantages in size scaling but only yield moderate electroresistance (ER) at room temperature due to the challenge imposing asymmetric interfacial screening large modulation tunneling potential profile. Here, we achieve ER all-oxide by paring a metal...

Abstract The needs of modern industry for high-performance lubricants remain difficult to meet. Therefore, finding ways improve their lubrication performance is crucial. A novel composite consisting two different structures the same compound was synthesized improving tribological properties. Flake-like micron MoS 2 (M-MoS ) with a size approximately 10 μm activated via oxidation, ultrasonication, and grinding. desired micro/nano structure (MN-MoS prepared through chemical deposition hollow...

Due to its wide bandwidth (35 MHz) and narrow duplex gap (10 MHz), UMTS900 is a very difficult standard for the implementation of duplexer with current technologies. In this paper, we present design performance UMTS-900 based on thin film bulk acoustic resonator (FBAR) technology. We have used external inductors compensate inadequate electromechanical coefficient resonators. Inductors are adjust locations filter transmission zeros achieve better attenuation in stopband as well. achieved good...

Ferroelectric van der Waals CuInP$_2$S$_6$ possesses intriguing quadruple-well states and negative piezoelectricity. Its technological implementation has been impeded by the relatively low Curie temperature (bulk $T_C$ ~42 °C) lack of precise domain control. Here we show that can be immune to finite size effect exhibits enhanced ferroelectricity, piezoelectricity, polar alignment in ultrathin limit when interfaced with ferroelectric oxide PbZr$_{0.2}$Ti$_{0.8}$O$_3$ films. Piezoresponse...

One-dimensional graphene superlattice subjected to strong Kronig-Penney (KP) potential is promising for achieving electron lensing effect, while previous studies utilizing the modulated dielectric gates can only yield a moderate, spatially dispersed profile. Here, we realize high KP modulation of via nanoscale ferroelectric domain gating. Graphene transistors are fabricated on PbZr$_{0.2}$Ti$_{0.8}$O$_{3}$ back-gates patterned with periodic, 100-200 nm wide stripe domains. Due band...