JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Xinyu Liu,Hongxue Li,Huaxu Zhou,Junjie Liu,Lequn Li,Jiyang Liu,Fei Yan,Tao Luo
4-Aminophenol (4-AP) served as the drug intermediates has been widely used or found in pharmaceutical preparations. Therefore, direct and rapid determination of 4-AP content in pharmaceuticals is highly important for human health. In this work, we demonstrate a simple and fast electrochemical method for direct analysis of 4-AP in pharmaceuticals by using the indium tin oxide (ITO) electrode modified with vertically-ordered mesoporous silica-nanochannel films (VMSF). Arising from the vertically-aligned nanochannels and high porosity of VMSF, 4-AP could permeate the VMSF and transfer to the underlying electrode surface, ultimately giving rise to the electrochemical signal. By using the differential pulse voltammetry (DPV) method, the VMSF/ITO sensor was able to detect 4-AP in a wide linear range from 0.5 μM to 400 μM. The obtained limit of detection was calculated as 0.32 μM. Owing to the good anti-fouling and anti-interference ability of VMSF, direct analysis of 4-AP in pharmaceuticals was achieved, without any complex sample pretreatments.
研究领域:
分析化学
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药学
·
电化学
·
纳米材料
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 15
·2102566
·
IF 6.389
Yi Yin,Haoyu Zhu,Tao Wu,Pengkun Liao,Changyong Lan,Chun Li
A bistable electrochromic (EC) device which can reversibly transform between transparent, mirror, and black states based on reversible metal Ag electrodeposition is achieved by introducing 1) a (3-mercaptopropyl) trimethoxysilane (MPTMS)-treated indium-tin-oxide (ITO) glass electrode modified with WO 3 nanoislands (WNs) as the rough surface and 2) ionic liquids (IL) into electrolyte to form an anion-blocking layer, toward achieving long-term memory performance. Typically, the EC cell is packaged by sandwiching gel electrolyte between the flat and WNs-modified ITO electrodes. Under opposite voltages, this smart device can transfer from transparent to black (+2.5 V/9.4 s) or mirror (−2.5 V/8.3 s) state by depositing Ag on the WNs-modified or flat ITO electrode surface, respectively. The assembled device exhibits over 80% mirror reflectance and below 10% transmittance of black state. After power off, both the black and mirror states remain bistability for a long time (>30 min) when IL are introduced into electrolyte for the EC device. The electrical double layer in the highly viscous electrolyte with IL contributes to form a barrier to bromide ions, which protects the Ag layer from dissolution at open circuit. This multifunctional energy-efficient EC device has shown great potential and competitiveness for numerous applications compared to conventional EC devices.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Fanju Zeng,Yuanyang Guo,Wei Hu,Yongqian Tan,Xiaomei Zhang,Julin Feng,Xiaosheng Tang
Recently, several types of lead halide perovskites have been demonstrated as active layers in resistive switching memory or artificial synaptic devices for neuromorphic computing applications. However, the thermal instability and toxicity of lead halide perovskites severely restricted their further practical applications. Herein, the environmentally friendly and uniform Cs3Cu2I5 perovskite films are introduced to act as the active layer in the Ag/Cs3Cu2I5/ITO memristor. Generally, the Ag ions could react with iodide ions and form AgIx compounds easily, so the Ag/PMMA/Cs3Cu2I5/ITO memristor was designed by employing the ultrathin polymethylmethacrylate (PMMA) layer to avoid the direct contact between the top Ag electrode and Cs3Cu2I5 perovskite films. After optimization, the obtained memristor demonstrated bipolar resistive switching with low operating voltage (< ±1 V), large on/off ratio (102), stable endurance (100 cycles), and long retention (>104 s). Additionally, biological synaptic behaviors including long-term potentiation and long-term depression have been investigated. By using the MNIST handwritten recognition data set, the handwritten recognition rate based on experimental data could reach 94%. In conclusion, our work provides the opportunity of exploring the novel application for the development of next-generation neuromorphic computing based on lead-free halide perovskites.
研究领域:
材料科学
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电子工程
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神经科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 7
·1-7
·
IF 5.705
Wang Panpan,Cao Ling,Wu Ying,Di Junwei
Under visible-light irradiation, a cathodic photoelectrochemical (PEC) sensor is presented for highly sensitive determination of Cr(VI) at a potential of −0.25 V (vs SCE). PbS quantum dots (QDs) were capped with mercaptoacetic acid and assembled on the surface of an indium tin oxide (ITO) electrode via the linker poly(diallyl dimethyl ammonium chloride) providing a photoactive sensor. Cr(VI) accepts the photoelectrons generated by the PbS QDs. This promotes the separation of electron holes and enhances the cathodic photocurrent generated by a 470-nm LED. The sensor has 10 pM detection limit and a linear working range from 0.02 nM to 2 μM of chromate. The method was successfully applied to the determination of Cr(VI) and total chromium in spiked environmental water samples.
Schematic illustration of the photocurrent enhancement response of ITO/PbS toward chromium(VI). In the presence of Cr(VI) (red line), Cr(VI) accepts the photoelectrons generated by the PbS QDs under 470-nm LED irradiation, resulting in improved photocurrent of ITO/PbS.
研究领域:
环境科学
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分析化学
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
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2020
·
IF 2.779
Jianqing Lin,Xing Ju,Chao Xu,Yu Yang,Xiaoze Du
Spectral beam splitting technology based on optical nanofluids (NFs) is a promising field of solar energy research. However, the challenges to optimize the optical properties and enhance the high temperature stability of NFs are always exist. In this study, Indium Tin Oxide (ITO) nanoparticles were selected as the research object because of the excellent optical properties. The Oleylamine-capped ITO nanoparticles were prepared by chemical reduction. A novel NF based on Therminol 66 was successfully prepared. The high temperature stability and optical properties of obtained Oil-based NFs were analyzed by the gravitational sedimentation method and spectrophotometry . Moreover, we experimentally studied the effect of single reaction condition on the morphology and Sn-doping of particles. The results indicated that, at the reaction condition of 320 °C, 5.5 h, and the In/Sn mole ratio of 90:10, the obtained nanoparticles had high monodispersity and crystallinity , and the resulting NF had good stability and dispersion. Furthermore, when tuning single reaction condition, the morphology and Sn doping of nanoparticles tended to be a regular change. However, the change of single reaction condition was not enough to obtain the ITO NFs with good stability and dispersion. The ITO NFs obtained in present study had high thermal stability, and showed different high-temperature characteristics in the Ultraviolet and visible (UV–Vis) and near infrared (NIR) regions.
研究领域:
材料科学
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太阳能技术
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纳米科技
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Yongxiang Wang,Jinming Zeng,Zuohao Zhou,Guocan Shen,Ting Tang,Rizwan Ur Rehman Sagar,Xiaopeng Qi
Constructing a nanostructured electrochromic film and enhancing the bonding strength between the electrochromic film and electrode would effectively improve the charge transport and stability of the electrochromic film. In the present study, nanoporous WO 3 films, including WO 3 films without polydopamine (W-x, x = 2, 3, and 4) and WO 3 films with polydopamine (PW-x, x = 2, 3, and 4), were built using a low-temperature hydrothermal method. The PW-x films showed significantly improved electrochromic cycle stability compared to the W-x films because the bonding strength between the ITO glass electrode and the WO 3 film was enhanced by polydopamine (PDA) film. Notably, the PW-2 film still retained 90.8% of its original optical contrast after 5000 cycles. In addition, both the W-2 and PW-2 films exhibited high optical contrast from visible to infrared regions owing to their 3D network nanoporous structure; their optical contrasts were 71.5% and 69.7% at 700 nm, respectively. Both the W-2 and PW-2 films also exhibited high coloration efficiency and areal capacitance; their coloration efficiencies were 80.4 and 72.5 cm 2 /C, and areal capacitances were 59.38 and 75.32 mF/cm 2 , respectively. PW-2 film is promising for electrochromic energy-saving smart windows with power storage.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2014
·Vol. 182
·期 1
·241-248
·
IF 3.719
Wang Mo,Yang Zhiqing,Guo Yunlong,Wang Xinxu,Yin Huanshun,Ai Shiyun
We demonstrate a photo-electrochemical biosensor for the sensitive and specific detection of microRNA using Bi 2 S 3 nanorods as a photoactive material and streptavidin as the unit that inhibits photocurrent. Bi 2 S 3 nanorods were synthesized hydrothermally in organic phase and displayed excellent light-to-current conversion efficiency. The Bi 2 S 3 was deposited on an indium tin oxide (ITO) slice and then modified with gold nanoparticles onto which biotinylated hairpin probe DNA was deposited as a monolayer. Following hybridization between the biotinylated probe DNA and the target microRNA, the stem-loop structure of the probe DNA was unfolded and the biotin directed outwards into the solution. Streptavidin was then added to bind to biotin via the strong streptavidin-biotin interactions. This causes the photocurrent of the modified ITO to decrease due to steric hindrance that blocks the transfer of electrons from added ascorbic acid to the surface of the electrode. The method has a detection limit as low as 3.5 fM of microRNA and can excellently discriminate even singly mismatched microRNA. The method was successfully applied to investigate the effect of abscisic acid on the expression level of microRNA-159a in seeds of Arabidopsis thaliana . We conclude that the assay presented here has a large potential as a method for quantification of microRNA and for studying the epigenetic regulation of flowering plants.
The photocurrent generation and decrease mechanism of the PEC biosensor.
研究领域:
生物传感器
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光化学
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纳米技术
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分子生物学
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植物科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2016
·
IF 7.145
Xiaoqin Zhang,Jiang Wu,Jiantai Wang,Qingqing Yang,Baohua Zhang,Zhiyuan Xie
We present a kind of all-solution-processed transparent conductive film comprising of silver nanowire (AgNW), polyvinyl butyral (PVB), and Al-doped ZnO nanoparticles (AZO NPs) composite (APA) by layer-by-layer blade-coating on glass substrate at low temperature. This kind of transparent APA film exhibits high transmittance at a wide range of 400–700 nm. The sheet resistance of the APA film can be as low as 21 Ω sq–1 with transmittance over 94% at 550 nm. The introduction of PVB significantly improves the APA composite adhesion to glass substrate. The overlaid coating of AZO NPs not only reduces the sheet resistance but also improves the ambient and thermal stability of the APA film. This highly conductive and transparent APA film on glass substrate is employed as the bottom electrode to fabricate high-efficiency polymer solar cells (PSCs). A power conversion efficiency of 8.98% is achieved for the PBDTTT-EFT:PC71BM PSCs employing the APA composite as transparent bottom electrode, close to 9.54% of the control device fabricated on the commercial indium tin oxide substrate. As it can be easily prepared with all-solution-processed blade-coating method at low temperature, this kind of AgNW-based composite film is promising to integrate with roll-to-roll manufacturing of flexible PSCs.
研究领域:
材料科学
·
能源科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Yan Ma,Qianwen Li,Siyu Wang,Yanan Wang,Hongye Liu,Xu Wang,Bing Zhao,Ziping Jiang,Weidong Ruan
The application of surface enhanced infrared absorption (SEIRA) is severely restricted in many fields due to the SEIRA substrates are constructed mainly from expensive noble metals. Therefore, the development of new SEIRA substrates other than the noble metallic ones is very valuable. Here we introduced a new semiconductor SEIRA substrate, the indium tin oxide (ITO) nanoparticles (NPs), to study the SEIRA property. The results demonstrate that the ITO NPs show the SEIRA property and the enhancement is dependent to the doping ratio of the heteroatoms of tin. The ITO NPs with the 5% atomic doping ratio show the highest SEIRA enhancement factor ( EF ), which is about 24. The limit of detection (LOD) of the 1,1′-dicarboxyferrocene (dcFc) molecule was as low as 10 −5 mol/L. The present study proves that the tin-doped indium oxide can be used as a new and inexpensive semiconductor SEIRA substrate. It also proves that the doped semiconductor NPs have strong potentials for being used as emerging SEIRA substrates.
研究领域:
材料科学
·
光学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
ACS Photonics
·
2025
·
IF 6.7
Yuyu Liu,Minming Yan,Kai Zhang,Ye Chen,Yaowu He,Hong Meng,Yong Huang,Yong Zhang
As a widely used hole-injecting material in quantum-dot light-emitting diodes (QLEDs), poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) remains limited by its acidity and hygroscopicity, which cause ITO corrosion and degrade the long-term stability of the devices. Herein, a carbazole-phosphonic acid, [2-(9H-carbazol-9-yl)ethyl]phosphonic acid (2PACz), is introduced as a substitute for PEDOT:PSS. As a result, the blue CdSe/ZnSe/ZnS QLEDs achieve a maximum external quantum efficiency (EQE), current efficiency, and luminance of 16.58%, 11.15 cd·A–1, and 31,764 cd·m–2, respectively. Notably, the T50 lifetime of the devices is extended from 55 h in PEDOT:PSS-based QLEDs to 148 h in 2PACz-based counterparts at a constant current density of 20 mA·cm–2. In our analysis, this enhancement is attributed to the dual-modification mechanism of 2PACz. On one hand, interaction between ITO and 2PACz modifies the work function, improves the film surface roughness, and ultimately reduces the interfacial traps of ITO. On the other hand, interaction between 2PACz and poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(4,4′-(N-(4-s-butylphenyl)diphenylamine)] (TFB) facilitates hole injection by optimizing the transport pathway through the π–π stacking, which effectively balances charge recombination.
研究领域:
材料科学
·
光电子学
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纳米技术
·
固体物理学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 79
·75186-75193
·
IF 3.289
Jie Yang,Chun Fang,Chunxiong Bao,Weiwei Yang,Tao Yu,Weidong Zhu,Faming Li,Jianguo Liu,Zhigang Zou
A Ni3S2 coated indium tin oxide (ITO) core–shell structure on flexible carbon fabrics (CF@ITO@Ni3S2) was prepared by electrodepositing Ni3S2 nanosheets on ITO nanowire arrays grown on flexible carbon fabrics by chemical vapor deposition. The ITO nanowires on carbon fabrics formed a conductive support which offered a large contact surface with the electrolyte and hence was accessible for ion diffusion. Ni3S2 nanosheets were uniformly deposited on the ITO nanowire. The maximum mass loading of Ni3S2 on ITO nanowire array coated carbon fabrics could reach about a quadruple higher amount than that on the bare carbon fabrics. The prepared CF@ITO@Ni3S2 electrodes exhibited excellent capacitive performance compared with Ni3S2 coated bare carbon fabric electrodes (CF@Ni3S2). High areal capacitance of 3.85 F cm−2 and gravimetric capacitance of 1865 F g−1 were achieved when the mass loadings of Ni3S2 on the ITO nanowire arrays were around 4.12 mg cm−2 and 0.96 mg cm−2, respectively. The sample with 0.96 mg cm−2 of Ni3S2 could also deliver 1372 F g−1 when charge–discharge current density reached 50 mA cm−2, indicating the excellent rate capability of the structure. The assembled all-solid-state full cell based on symmetric electrodes obtained a relatively high areal capacitance of 736 mF cm−2 at 8 mA cm−2, which delivered a maximum energy density of 1.02 mW h cm−3 at a power density of 39.9 W cm−3. The outstanding capacitive performance suggests that the CF@ITO@Ni3S2 device was promising for application in an inexpensive energy storage system.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2013
·Vol. 180
·期 13
·1325-1332
·
IF 3.434
Wu Ying,Feng Xun,Zhou Shenghai,Shi Hongyan,Wu Hongmin,Zhao Shujie,Song Wenbo
We report on a sensor for epinephrine (EP) that is based on an ITO electrode modified with multi-walled carbon nanotubes pre-coated with a polymerized ionic liquid (PIL-MWNTs). A chitosan film was then electrodeposited on the ITO electrode in the presence of EP (the template) and the PIL-MWNTs. This film acts as an excellent recognition matrix due to its excellent film-forming ability and the many functional groups that favor hydrogen bond formation with the target (EP). The PIL-MWNTs, in turn, can improve the sensing performance due to their good electrical conductivity, high dispersity, and large surface area. The imprinted films were characterized by scanning electron microscopy, X-ray diffraction, Fourier transform IR spectroscopy, and thermogravimetric analysis. The electrochemistry of the imprinted electrode was investigated by cyclic voltammetry, electrochemical impedance spectroscopy, differential pulse voltammetry and chronoamperometry. The response to EP is linear in the 0.2 μM to 0.67 mM concentration range, and the detection limit is as low as 60 nM (at an S/N of 3). The electrode is reusable and offers good reproducibility and stability.
An epinephrine imprinted electrode was facile achieved by electrodepositing chitosan on ITO surface in the presence of epinephrine and polymerized ionic liquid-functionalized carbon nanotubes, followed by removal of the epinephrine template molecule. Specific recognition of EP molecule and its determination were realized at this imprinted sensor.
研究领域:
生物传感器
·
分析化学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）