In this study, a novel flexible PVP/PVA-co-PE composite film with excellent transparency and large-scale bending deformation capability was prepared by a simple impregnation process. Due to the similar refractive index between the filling phase of PVP and PVA-co-PE nanofibers, the pore layer of the nanofibrous was replaced by PVP after impregnation, thus endowing the composite film with excellent optical

Most NO gas sensors are evaluated using continuous NO gas, making it difficult to accurately recognize discontinuous gas flow. Here, to reveal the response characteristics in discontinuous gas flows, we investigated a response in various NO gas flows using a boron nitride-based memristor gas sensor. In conventional continuous gas flow, the response characteristic of 16% showed for 5 ppm NO gas, while

Efficiently capturing and detecting α-synuclein (α-syn) in the bloodstream is crucial for early Parkinson's Disease (PD) diagnosis. In this study, we achieved efficient α-syn detection using electrochemical methods with Mg-based micromotors containing Fe3O4/GOx nanoparticles (NPs) and anti-α-syn antibodies. Leveraging the asymmetrical structure of the micromotors, we significantly improved the movement

The mixed conductor porous layer was prepared by introducing the electronic conductor NiO into the oxygen ion conductor YSZ for the impedimetric NO2 sensor. By changing the ratio of YSZ/NiO in the porous layer, the morphology and electron-ion conduction properties of the mixed conductor porous layer were tuned to obtain the high-performance sensing electrode/electrolyte/gas three-phase boundary (TPB)

This work presents the fabrication of U-shaped plastic optical fiber (POF) sensors for hydrogen sulfide (H2S) detection, coated with Fe3O4 nanoparticles synthetized using the Pulsed Laser Ablation in Liquid (PLAL) technique. The Fe3O4 nanoparticles were synthetized in ultra-pure water and in silver nitrate solution, resulting in two colloidal samples with different morphological, optical, and structural

Designing a multifunctional nucleic acid platform with the ability to identify multiple biomarkers is crucial for accurate molecular diagnostics. Here we reported a dual-target branch-shaped nucleic acid probing (DBNP) system and its targeted delivery for simultaneous analysis of intracellular microRNAs (miRNAs). The system consisted of a cross-shaped DNA scaffold equipped with four hairpin strands

In this study, a highly sensitive and stable Ti3C2Tx MXenes-RGO humidity sensor was developed for real-time respiratory monitoring. Ti3C2Tx-RGO composite material increases the interlayer spacing of RGO, further expanding the channels for water molecule transport. Introduction of Ti3C2Tx promotes the generation of more -O, -OH, -F groups on the composite material surface, which can serve as adsorption

Metal oxide-based gas sensors are widely used in the detection of toxic and harmful gases due to their advantages of high precision, convenient use and stable performance, but their application range is limited due to the high working temperature. In this work, MOF-derived flower-like Fe-doped Co3O4 porous hollow structures are obtained using a simple solvothermal method. The obtained samples are characterized

Chemoresistive humidity sensors have gained massive attraction owing to the high potential for application in real-time breath monitoring. Herein, we introduce a chemoresistive humidity sensor based on ultrathin V2O5·nH2O nanobelts (NBs) prepared by liquid-phase exfoliation. Due to the layered structure, water molecules were embedded between layers, increasing the active surface area. Moreover, the

Quick and efficient immobilization of DNAs on gold nanoclusters (AuNCs) has a substantial impact on nanoscale applications relative to molecular recognition and patterned assembly. We found that in the presence of tris(2-carboxyethyl)phosphine (TCEP), chemisorption of thiolated DNA on the AuNC surface could be accomplished within 1.5 h, which was dramatically shorter than the incubation time needed

Dual-signal amplification sensing strategy has been constructed by the competitive host-guest cycling recognition process. Owing to superior photoelectric and photothermal performance of In2Se3 nanoparticles (NPs), the multifunctional probe modified with In2Se3 NPs can generate significantly increased photocurrent and temperature dual signals output during the one-time sensing process. To further achieve

We suggest a multi-layered stretchable sensor with a carbon nanotube (CNT) layer enclosed by an embedded layer of silver (Ag-Ecoflex), and show how it can be used in biomedical applications. The current direction can be controlled along the vertical or lateral axis on the Ag-Ecoflex layer by adjusting the composite Ag ratio; the CNT layer can determine electrical conductivity from the bypassed current

In this research, cuprous oxide (pristine Cu2O) and rGO (reduced graphene oxide)-doped Cu2O were prepared using a simple synthetic route and adopted as sensitive materials for ozone detection. The microstructural, morphological and compositional properties of as-prepared samples have been analyzed by several characterization techniques including X-ray diffraction (XRD), High resolution transmission

The extensive use of cefapirin (CP) in milk has caused various health issues, resulting in an urgent need for an efficient assay for its detection. This study aimed to perform a colorimetric/fluorescence dual-mode assay based on graphene oxide–assisted systematic evolution of ligands by exponential enrichment (GO-SELEX) in vitro screening method for detecting CP aptamers. The aptamer (Apt22) had a

Developing accurate, sensitive, and rapid methods for microRNA analysis in living cells is crucial for cancer diagnosis. Recent advances in enzyme-free amplification and spatial-confinement techniques have enhanced both the sensitivity and speed of miRNA detection. However, they also introduce a challenging contradiction: while localized amplification increases the sensitivity of miRNA detection, the

Unreasonable disposal of sulfadoxine (SDX) causing food safety and eventually result water pollution, and shows great significance of detection. A sensitive unit Aptamer (Apt) was adopted to construct an electrochemical sensor BSA/Apt/indole/MWCNTs/GCE with the synergistic amplification of multi-walled carbon nanotubes (MWCNTs) and indole for the detection of SDX. Optimization of the conditions allowed

Lab-On-Chips (LOCs) offer several advantages over traditional approaches for studying biological models and evaluating drug efficacy. Despite their small size, they present highly complex environments where significant chemical gradients are often confined to specific regions, either through intentional manipulation by researchers or generated by the cellular model itself. To address these challenges

In this research, WS2 nanomaterials were synthesized by a hydrothermal method at first. Then, partially oxidized WS2 through calcination to obtain WO3/WS2 binary materials via calcination. Among different calcination temperatures (400 °C, 350 °C and 300 °C), the WO3/WS2 with the best performance calcined at 300 °C was selected to load Pd on the surface. Particularly, the 2 at% Pd-WO3/WS2 exhibited

Humidity sensors are of great significance in industry, agriculture and human activities, and many nanomaterials are already used for humidity sensing. Linear ionic polymers with hydrophilic groups have exhibited good humidity detection performance because they can adsorb water and then dissociate charged carriers. However, it suffers from the instability under high relative humidity that caused by

Cross-sensitivity among chemical gas sensors leads to inaccurate identification of mixed gas. Pattern recognition algorithms are usually applied to improve the recognition accuracy. However, the abilities of current methods to process sequence property of response data are not strong enough. Especially, they cannot deal with bidirectional cross-sensitive issue, leading to recognition errors. Bidirectional

The gas-phase odor biosensors exhibit outstanding sensitivity and selectivity towards target ligands. Current odor detections, however, were only operated under one or multiple separated olfactory receptors (ORs) stimulated by a single component odor. Meanwhile, the nonlinear characteristic, drift, and aging problems in biosensors were the main barriers for better quantification performance. Here,

Ethanol and acetone sensors have a wide variety of applications across different industries. However, it is necessary to improve the performance of such sensors and to understand the underlying mechanisms. In this study, Pd/PdO-WO3 nanoblocks are synthesized via hydrothermal growth and calcination. The Pd and PdO contents of the materials are tuned by varying the Pd doping concentration and annealing