Chemically synthesized nanowire TiO2/ZnO core-shell p-n junction array for high sensitivity ultraviolet photodetector

2013 ◽  
Vol 103 (19) ◽  
pp. 193119 ◽  
Author(s):  
T. D. Dao ◽  
C. T. T. Dang ◽  
G. Han ◽  
C. V. Hoang ◽  
W. Yi ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Core Shell ◽  
Ultraviolet Photodetector ◽  
Junction Array

Core-shell Cu@C@ZIF-8 composite: a high-performance electrode material for electrochemical sensing of nitrite with high selectivity and sensitivity

2021 ◽  
Author(s):  
Feng Gao ◽  
Xiaolong Tu ◽  
Yongfang Yu ◽  
Yansha Gao ◽  
Jin Zou ◽  
...  
Keyword(s):  
High Performance ◽  
High Selectivity ◽  
Limit Of Detection ◽  
Metal Organic Framework ◽  
High Sensitivity ◽  
Electrochemical Sensing ◽  
Core Shell ◽  
Zeolitic Imidazolate Framework ◽  
Sensing Platform ◽  
The Difference

Abstract Herein, an efficient electrochemical sensing platform is proposed for selective and sensitive detection of nitrite on the basis of Cu@C@Zeolitic imidazolate framework-8 (Cu@C@ZIF-8) heterostructure. Core-shell Cu@C@ZIF-8 composite was synthesized by pyrolysis of Cu-metal-organic framework@ZIF-8 (Cu-MOF@ZIF-8) in Ar atmosphere on account of the difference of thermal stability between Cu-MOF and ZIF-8. For the sensing system of Cu@C@ZIF-8, ZIF-8 with proper pore size allows nitrite diffuse through the shell, while big molecules cannot, which ensures high selectivity of the sensor. On the other hand, Cu@C as electrocatalyst promotes the oxidation of nitrite, thereby resulting high sensitivity of the sensor. Accordingly, the Cu@C@ZIF-8 based sensor presents excellent performance for nitrite detection, which achieves a wide linear response range of 0.1 µM to 300.0 µM, and a low limit of detection (LOD) of 0.033 µM. In addition, the Cu@C@ZIF-8 sensor possesses excellent stability and reproducibility, and was employed to quantify nitrite in sausage samples with recoveries of 95.45-104.80%.

Ultra-high sensitivity of rhodamine B sensing based on NaGdF4:Yb3+,Er3+@NaGdF4 core-shell upconversion nanoparticles

2019 ◽  
Vol 37 (4) ◽  
pp. 339-344 ◽  
Author(s):  
Hanping Xiong ◽  
Qiuhong Min ◽  
Hongqing Ma ◽  
Lei Zhao ◽  
Wenbo Chen ◽  
...  
Keyword(s):  
Rhodamine B ◽  
High Sensitivity ◽  
Upconversion Nanoparticles ◽  
Core Shell

scholarly journals High sensitivity and rapid response ultraviolet photodetector of a tetragonal CsPbCl3 perovskite single crystal

2020 ◽  
Vol 10 (6) ◽  
pp. 1374 ◽  
Author(s):  
Ziyue Rao ◽  
Wenyi Liang ◽  
Haiming Huang ◽  
Jun Ge ◽  
Weiliang Wang ◽  
...  
Keyword(s):  
Single Crystal ◽  
High Sensitivity ◽  
Rapid Response ◽  
Ultraviolet Photodetector

High responsivity, fast ultraviolet photodetector fabricated from ZnO nanoparticle–graphene core–shell structures

Nanoscale ◽  
2013 ◽  
Vol 5 (9) ◽  
pp. 3664 ◽  
Author(s):  
Dali Shao ◽  
Mingpeng Yu ◽  
Hongtao Sun ◽  
Tao Hu ◽  
Jie lian ◽  
...  
Keyword(s):  
Shell Structures ◽  
Core Shell ◽  
Zno Nanoparticle ◽  
Ultraviolet Photodetector ◽  
High Responsivity

Ferroelectric Localized Field-Enhanced ZnO Nanosheet Ultraviolet Photodetector with High Sensitivity and Low Dark Current

Small ◽  
2018 ◽  
Vol 14 (22) ◽  
pp. 1800492 ◽  
Author(s):  
Peng Wang ◽  
Yang Wang ◽  
Lei Ye ◽  
Mingzai Wu ◽  
Runzhang Xie ◽  
...  
Keyword(s):  
Dark Current ◽  
High Sensitivity ◽  
Ultraviolet Photodetector

Synthesis of Trilaminar Core–Shell Au/α-Fe2O3@SnO2Nanocomposites and their Application for Nonenzymatic Dopamine Electrochemical Sensing

NANO ◽  
2019 ◽  
Vol 14 (11) ◽  
pp. 1950138 ◽  
Author(s):  
Sai Zhang ◽  
Shijun Yue ◽  
Jiajia Li ◽  
Jianbin Zheng ◽  
Guojie Gao
Keyword(s):  
Electron Microscopy ◽  
High Sensitivity ◽  
Electrochemical Sensing ◽  
Synthesis Process ◽  
Core Shell ◽  
X Ray Diffraction ◽  
X Ray ◽  
Long Term Stability ◽  
Transmission Electron

Au nanoparticles anchored on core–shell [Formula: see text]-Fe2O3@SnO2 nanospindles were successfully constructed through hydrothermal synthesis process and used for fabricating a novel nonenzymatic dopamine (DA) sensor. The structure and morphology of the Au/[Formula: see text]-Fe2O3@SnO2 trilaminar nanohybrid film were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The electrochemical properties of the sensor were investigated by cyclic voltammetry and amperometry. The experimental results suggest that the composites have excellent catalytic property toward DA with a wide linear range from 0.5[Formula: see text][Formula: see text]M to 0.47[Formula: see text]mM, a low detection limit of 0.17[Formula: see text][Formula: see text]M (S/[Formula: see text]) and high sensitivity of 397.1[Formula: see text][Formula: see text]A[Formula: see text]mM[Formula: see text][Formula: see text]cm[Formula: see text]. In addition, the sensor exhibits long-term stability, good reproducibility and anti-interference.

scholarly journals Proximity Array Device: A Novel Photon Detector Working in Long Wavelengths

2020 ◽  
Vol 5 (2) ◽  
pp. 33 ◽  
Author(s):  
S. Javad Rezvani ◽  
Daniele Di Gioacchino ◽  
Claudio Gatti ◽  
Carlo Ligi ◽  
Mariangela Cestelli Guidi ◽  
...  
Keyword(s):  
Vortex Dynamics ◽  
Characteristic Frequency ◽  
Tunneling Current ◽  
High Sensitivity ◽  
Photon Detector ◽  
Quasi Particle ◽  
Long Wavelength ◽  
Metal State ◽  
Photo Response ◽  
Junction Array

We present here an innovative photon detector based on the proximity junction array device (PAD) working at long wavelengths. We show that the vortex dynamics in PAD undergoes a transition from a Mott insulator to a vortex metal state by application of an external magnetic field. The PAD also evidences a Josephson I-V characteristic with the external field dependent tunneling current. At high applied currents, we observe a dissipative regime in which the vortex dynamics is dominated by the quasi-particle contribution from the normal metal. The PAD has a relatively high photo-response even at frequencies below the expected characteristic frequency while, its superconducting properties such as the order parameter and the Josephson characteristic frequency can be modulated via external fields to widen the detection band. This device represents a promising and reliable candidate for new high-sensitivity long-wavelength detectors.

Core-Shell P-N Junction Si Nanowires as Rapid Response and High-Sensitivity pH Sensor

2017 ◽  
Vol 17 (13) ◽  
pp. 3967-3974 ◽  
Author(s):  
Bohr-Ran Huang ◽  
Cheng-Liang Hsu ◽  
Yu-Kang Wang ◽  
Wen-Luh Yang
Keyword(s):  
Ph Sensor ◽  
High Sensitivity ◽  
Rapid Response ◽  
Core Shell ◽  
Si Nanowires

scholarly journals Selective Nonenzymatic Amperometric Detection of Lactic Acid in Human Sweat Utilizing a Multi-Walled Carbon Nanotube (MWCNT)-Polypyrrole Core-Shell Nanowire

Biosensors ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 111 ◽  
Author(s):  
Young Min Choi ◽  
Hana Lim ◽  
Ho-Nyun Lee ◽  
Young Min Park ◽  
Jin-Seong Park ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Carbon Nanotube ◽  
Sports Medicine ◽  
Amperometric Detection ◽  
High Sensitivity ◽  
Core Shell ◽  
Selective Detection ◽  
Human Sweat ◽  
Potential Applications ◽  
Lactate Sensor

Lactic acid plays an important role as a biochemical indicator for sports medicine and clinical diagnosis. The detection of lactic acid in sweat is a promising technique without any intrusive inconvenience or risk of infection. In this study, we present a selective nonenzymatic amperometric detection method for lactic acid in human sweat utilizing a multi-wall carbon nanotube (MWCNT)-polypyrrole core-shell nanowire. Because polypyrrole is a p-type conducting polymer, onto which anions are exclusively doped, leading to charge transfer, it offers selective detection for lactate anions at a specific potential, while being inert to the neutral and cationic species contained in human sweat. A chronoamperometric study reveals good sensing performance for lactic acid with a high sensitivity of 2.9 μA mM−1 cm−2 and detection limit of 51 μM. Furthermore, the MWCNT-polypyrrole nanowire exhibits excellent selectivity for lactic acid over interfering species, such as sodium chloride, glucose, urea, and riboflavin, which coexist with lactic acid in sweat. Finally, a nonenzymatic amperometric sensor for the selective detection of lactic acid in human sweat is demonstrated on commercial flexible electrodes. The results demonstrate the potential applications of the MWCNT-polypyrrole core-shell nanowire as a nonenzymatic amperometric lactate sensor.

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