ABSTRACT The structural and electrical properties of ionic metal‐alkanoate nanocomposites obtained based on a cadmium octanoate matrix with individual carbon gold nanoparticles (NPs) as well their combination are studied. Carbon NPs were chemically synthesized within the smectic A phase Cd +2 (C 7 H 15 COO − ) 2 , which served well‐ordered nanoreactor. Scanning electron microscopy (SEM) transmission (TEM) data provide information location allow estimation sizes inside glassy liquid...

We fabricate two-layer (TL) silicon nanowires (NW) field-effect transistors (FETs) with a liquid gate. The NW devices show advanced characteristics, which reflect reliable single-electron phenomena. A strong modulation effect of channel conductivity effectively tuned parameters is revealed. opens up prospects for applications in several research fields including bioelectronics and sensing applications. Our results shed light on the nature single trap dynamics can be fine-tuned to enhance...

Abstract Numerous sensitive nanobiosensors are reported for various bioassay applications as a result of the development materials science and nanotechnology. Among these sensors, nanowire (NW) field‐effect transistors (FETs) represent one most promising practical biosensors ultrasensitive clinical diagnostic tools. Most studies mainly focus on how to achieve lower detection limit but pay less attention long settling time effect very small concentrations molecules in solution. In this study,...

Abstract Transistor biosensors are mass-fabrication-compatible devices of interest for point care diagnosis as well molecular interaction studies. While the actual transistor gates in processors reach sub-10 nm range optimum integration and power consumption, studies on design rules signal-to-noise ratio (S/N) optimization transistor-based have been so far restricted to 1 µm 2 device gate area, a where discrete nature defects can be neglected. In this study, which combines experiments...

Abstract The results obtained for liquid‐gated (LG) nanowire (NW) field‐effect transistor (FET) sensors analyzed in divalent ion (MgCl 2 ) solutions, which play a crucial role the human body, are reported. Liquid‐gated NW FET fabricated in‐house investigated using I–V characteristics and noise spectroscopy wide range of voltages different intensities optical infrared irradiation. A new effect is revealed under influence external excitation. allows control characteristic times single‐trap...

Abstract High‐quality liquid gate‐all‐around (LGAA) silicon nanowire (NW) field‐effect transistor (FET) biosensors are fabricated and studied their properties in 1 m phosphate‐buffered saline solution with pH = 7.4 using transport noise spectroscopy. At small V DS , the conventional current behavior of FET a linear dependence on voltage is registered output current‐voltage ( I‐V M ) characteristics 1. drain‐source > 0.6 V, stronger power revealed. It shown that LGAA NW FETs follows...

The main goal is to study the structural and dielectric characteristics of advanced composite materials based on ionic metal alkanoates with various types nanoparticles. matrix Cd+2(C7H15COO)−2 formed as a result reaction cadmium carboxylate groups alkanoate (C7H15COO)−2 used for synthesis At room temperature, crystalline material represents multilayer structure each layer thickness 1.8 nm. However, when heated in temperature range from 100 °C 180 °C, undergoes phase transition into liquid...

pH sensors, with high sensitivity, durability, and low cost, are considered to be essential tools in several applications such as laboratory experiments, water quality, agriculture, healthcare. Because of their unique properties, carbon allotropes have attracted a lot attention during the last decade utilized applications, which sensing is one them. In this work, hybrid film graphene nanoplatelets (GPs) gold nanoparticles (GNPs), where GNPs embedded GP layer, was used an active layer...

Silicon two‐layer (TL) nanowire (NW) field‐effect transistors (FETs) are fabricated by applying a CMOS‐compatible top‐down approach to silicon on insulator (SOI) wafers with additionally epitaxially grown layers. Transport and noise properties of structures p‐type conductivity studied in wide temperature range (100–300 K). A random telegraph signal (RTS) as special case trapping‐detrapping processes is registered dominant component at room temperature. shift the characteristic corner...

Abstract In small‐area transistors, the trapping/detrapping of charge carriers to/from a single trap located in gate oxide near Si/SiO 2 interface leads to discrete switching transistor drain current, known as single‐trap phenomena (STP), resulting random telegraph signals. Utilizing STP‐approach, liquid‐gated (LG) nanowire (NW) field‐effect biosensors have recently been proposed for ultimate biosensing with enhanced sensitivity. this study, impact channel doping concentration on capture...

We reveal the comparative relationship between small changes in quantum conductivity behavior for molecular junctions. clarify mechanisms of acquiring and losing additional thermal activation energy during average current flow a gold-1,4 benzenediamine (BDA)-gold junction explain conductance modulation process. Small working temperature lead to change conductivity, which is reflected random telegraph signal behavior. demonstrate high sensitivity BDA molecules temperature. For molecules,...

Label‐free, low‐noise, and ultrahigh‐sensitive biosensors based on liquid‐gated silicon (Si) nanowire (NW) field‐effect transistors (FETs) have recently emerged as promising diagnostic tools that can be used for healthcare monitoring point‐of‐care applications. However, the sensing capabilities performance of such devices still critically depend several factors, including quality intrinsic properties materials used. In particular, important role determining device is assigned to gate...

Abstract Recently it is shown that sensitivity of biosensors can be considerably improved using single trap phenomena resulting in two‐level random telegraph signal (RTS) switching current. To develop the transistor structure with a predefined position gold antenna suggested, which excited by light different intensities to influence properties underlying dielectric layer. High‐quality liquid gate‐all‐around (LGAA) silicon nanowire (NW) field‐effect (FET) are fabricated bowtie antenna. The...

Abstract With the fast-shrinking of transistor dimensions, low-frequency noise level considerably increases emerging as an important parameter for design advanced devices information technologies. Single-trap phenomena (STP) is a promising approach suppression technique in nanotransistor biosensors by considering trapping/detrapping signal. We show reduction mechanism offered STP nanoscale making analogy with stochastic resonance effect found biological systems single trap bistable...

We study the liquid crystalline phase behaviour of two-component aqueous colloidal suspensions multiwalled carbon nanotubes (MWCNTs) and rod-like vanadium pentoxide (V2O5) nanoparticles. The diagram features a stable nematic in wide range concentration solid components. oriented suspension was exposed to action alternating current electric field. A variation MWCNTs within 0.01–0.51 wt.% demonstrates significant increase optical response system applied

We fabricated new types of nanowires that consist two silicon layers with different doping concentrations.Fabricated structures demonstrate pronounced random telegraph signal fluctuations as a result single electron dynamic processes.Liquid-gated nanowire transistor devices show advanced characteristics favorable for sensing approach based on trap phenomena.

Abstract High‐quality, liquid‐gated two‐layer (TL) nanowire (NW) field‐effect transistor (FET) structures are fabricated and studied in different operation regimes with concentrations of MgCl 2 solutions. The space‐charge‐limited current (SCLC) effect is sensitive to surface phenomena registered at the drain‐source voltage ( V DS ) above 0.14 V, analyzed using several methods including noise spectroscopy. Noise spectra reflect clear transformation from 1 /f / f power 1.5) behavior,...

Abstract The transport and noise properties of fabricated, high‐performance, gate‐all‐around silicon liquid‐gated nanowire field‐effect transistor devices are investigated in different concentrations MgCl 2 solutions. critical concentration solution for charge inversion at the solid‐liquid interface is verified using spectroscopy confirmed capacitance‐voltage measurement technique. In this study, it found that Hooge parameter ( α H ) equivalent input S U can effectively reflect ion behavior...

We propose acousto-optic (AO) polarization switch based on a paratellurite crystal.The geometry of anisotropic interaction is chosen so as to satisfy the Bragg conditions for two alternative light polarizations at wavelength 785 nm.For this both direct and reflected from crystal face acoustic waves are used.The output governed by switching between one frequencies driving ultrasound signal applied AO cell.The device parallax-compensated, that beams with different leave cell same point, no...