Zhangzhou Normal College

Zhangzhou, China

Zhangzhou Normal College

Zhangzhou, China

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Li F.-M.,Zhangzhou Normal College | Liu J.-M.,Zhangzhou Normal College | Wang X.-X.,Zhangzhou Normal College | Lin L.-P.,Zhangzhou Normal College | And 5 more authors.
Sensors and Actuators, B: Chemical | Year: 2011

Gold nanorods (GNRs) exhibit strong longitudinal surface plasmon resonance absorption (LPA), which is highly dependent on its aspect ratio (length/width). The strong oxidization of Cr (VI) enables it to etch GNRs selectively at tips. The redox etching causes the aspect ratio of GNRs to decrease, resulting in the LPA blue shifts and the color of GNRs distinctly changes. Besides, the blue shift is linear to the concentration of Cr (VI) in the range of 0.1-20 μM. Thus, a non-aggregation based label free colorimetric sensor for the detection of Cr (VI) has been developed based on the selective etching of GNRs. The proposed colorimetric sensor is responsive, simple, sensitive (detection limit is 8.8 × 10-8 M) and selective, and it has been successfully applied to the detection of Cr (VI) in drinking water and sea water. Moreover, the mechanism of colorimetric sensor for the detection of Cr (VI) was also discussed. © 2011 Elsevier B.V. All rights reserved.


Liu J.-M.,Zhangzhou Normal College | Lin L.-P.,Zhangzhou Normal College | Wang X.-X.,Zhangzhou Normal College | Lin S.-Q.,Fujian Education College | And 3 more authors.
Analyst | Year: 2012

Based on the ability of lysine (Lys) to enhance the fluorescence intensity of bovine serum albumin modified-carbon dots (CDs-BSA) to decrease surface defects and quench fluorescence of the CDs-BSA-Lys system in the presence of Cu 2+ under conditions of phosphate buffer (PBS, pH = 5.0) at 45 °C for 10 min, a sensitive Lys enhancing CDs-BSA fluorescent probe was designed. The environment-friendly, simple, rapid, selective and sensitive fluorescent probe has been utilized to detect Cu 2+ in hair and tap water samples and it achieved consistent results with those obtained by inductively coupled plasma mass spectroscopy (ICP-MS). The mechanism of the proposed assay for the detection of Cu 2+ is discussed. © 2012 The Royal Society of Chemistry.


Liu J.-M.,Zhangzhou Normal College | Lin L.-P.,Zhangzhou Normal College | Wang X.-X.,Zhangzhou Normal College | Cai W.-L.,Zhangzhou Normal College | And 3 more authors.
Analytica Chimica Acta | Year: 2012

Al 3+ could react with quercetin (Q) to form [AlQ] 3+ complex which could be used as a template for the preparation of poly (vinyl alcohol)-[AlQ] 3+ complex imprinting (PVA-C-I). The [AlQ] 3+ not only had good matching ability and selectivity with the cavity of PVA-C-I, but also could react with the fluorescein isothiocyanate anion (FITC -) on the outside of cavity by electrostatic interaction to form ion-association complex [AlQ] 3+·[(FITC) -] 3. The ion-association complex could emit strong and stable room temperature phosphorescence (RTP) on polyamide membrane (PAM) and the ΔI p of the system had linear relationship with the content of Q, showing the highly selective identification of PVA-C-I to Q. Thus, a new coupling technique for the determination of trace Q based on solid substrate room temperature phosphorimetry and poly (vinyl alcohol) complex imprinting (PVA-C-I-SSRTP) was established. The linear range and limit of detection (LOD) of this method were 0.010-2.0 (×10 -12gmL -1) and 2.0×10 -14gmL -1, respectively, showing wide linear range and high sensitivity of PVA-C-I-SSRTP. This method was used to determine the content of Q in waste water, and the results are consistent with those by spectrofluorimetry. Meanwhile, the mechanism for the determination of Q using PVA-C-I-SSRTP was also discussed. © 2012.


Cui M.-L.,Zhangzhou Normal College | Liu J.-M.,Zhangzhou Normal College | Wang X.-X.,Zhangzhou Normal College | Lin L.-P.,Zhangzhou Normal College | And 4 more authors.
Sensors and Actuators, B: Chemical | Year: 2013

Bright red-emissive gold nanoclusters (AuNCs) were synthesized by a facile one-pot approach in aqueous solution using bovine serum albumin (BSA) as a protecting agent. A new BSA-AuNC fluorescent sensor for the detection of S 2- has been designed based on the sharp fluorescence quenching of BSA-AuNCs, which results from the degradation of its structure due to the formation of Au2S by the reaction between Au and S2-. The proposed highly sensitive (the detection limit [LD] was 0.029 μM) and selective sensor was applied to the detection of S2- in the presence of high concentrations of different anions in aqueous solution, and the results were in good agreement with those determined by electrochemical methods. The sensor is shown to be environmentally friendly, simple, responsive and practical. Meanwhile, the morphological changes of BSA-AuNCs and BSA-AuNCs-S2- were characterized by high-resolution transmission electron microscopy (HRTEM). Furthermore, the sensing mechanism for the detection of S2- is discussed. © 2013 Elsevier B.V.


Liu J.-M.,Zhangzhou Normal College | Wang X.-X.,Zhangzhou Normal College | Cui M.-L.,Zhangzhou Normal College | Lin L.-P.,Zhangzhou Normal College | And 3 more authors.
Sensors and Actuators, B: Chemical | Year: 2013

Dopamine (DA) could reduce Ag+ to Ag on the surface of gold nanorods (AuNRs) to form Au core-Ag shell nanorods (Au@AgNRs) in AuNRs-Ag+-DA system, which caused dielectric function to change, the aspect ratio of AuNRs to decrease and longitudinal plasmon absorption band (LPAB) of AuNRs to blue shift (Δλ), as well as the color of the solution to change obviously. Thus, a non-aggregation colorimetric sensor for rapid determination of DA was developed based on the linear relationship between Δλ and the concentration of DA. The responsive, simple, sensitive and selective colorimetric sensor has been successfully applied to the detection of DA in serum, showing its great practicality. At the same time, the structures of AuNRs and Au@Ag NRs were characterized by transmission electron microscope (TEM). Meanwhile, the sensing mechanism for the detection of DA has been discussed. © 2012 Elsevier B.V. All rights reserved.


Cui M.-L.,Zhangzhou Normal College | Liu J.-M.,Zhangzhou Normal College | Wang X.-X.,Zhangzhou Normal College | Lin L.-P.,Zhangzhou Normal College | And 4 more authors.
Analyst | Year: 2012

Gold nanoclusters (AuNCs) were synthesized by a macromolecules template using bovine serum albumin (BSA) as stabilizer which can emit red photoluminescence under illumination of ultraviolet light. The fluorescence intensity of AuNCs enhanced through decreasing the surface defects of AuNCs modified with cysteine, herein we present a novel fluorometry for determination of trace cysteine. This method with a wider linear range from 2.0 to 800 nmol mL-1, higher sensitivity (detection limit was 1.2 nmol mL -1) and better selectivity has been utilized to determine cysteine content in real samples, and the results were in a good agreement with those determined by electrochemical biosensor. At the same time, the structures of AuNCs and AuNCs-cysteine were characterized by Fourier-transform infrared spectroscopy (FTIR) and high resolution transmission electron microscopy (HRTEM) and the mechanism of the proposed assay for the detection of cysteine has been discussed. This journal is © 2012 The Royal Society of Chemistry.


Liu J.-M.,Zhangzhou Normal College | Wang X.-X.,Zhangzhou Normal College | Jiao L.,Zhangzhou Normal College | Cui M.-L.,Zhangzhou Normal College | And 3 more authors.
Talanta | Year: 2013

Fe3+ can catalyze H2O2 to oxidize along on the longitudinal axis of gold nanorods (AuNRs), which caused the aspect ratio of AuNRs to decrease, longitudinal plasmon absorption band (LPAB) of AuNRs to blueshift (Δλ) and the color of the solution to change obviously. Thus, a rapid response and highly sensitive non-aggregation colorimetric sensor for the determination of Fe3+ has been developed based on the signal amplification effect of catalyzing H2O2 to oxidize AuNRs. This simple and selective sensor with a wide linear range of 0.20-30.00 μM has been utilized to detect Fe3+ in blood samples, and the results consisted with those obtained by inductively coupled plasma-mass spectroscopy (ICP-MS). Simultaneously, the mechanism of colorimetric sensor for the detection of Fe3+ was also discussed. © 2013 Elsevier B.V.


Chen C.,Zhangzhou Normal College
Yadian Yu Shengguang/Piezoelectrics and Acoustooptics | Year: 2012

In this paper, a new method of the laser etching technology was proposed for the small adjusting parameter of the microwave dielectric ceramics resonator. The FEM for solving the eigenvalue problem was firstly deduced by electromagnetic theory, meanwhile, the shortcomings of the mechanical adjustment resonator parameter was verified with the FEM. Several factors affecting laser etching operation were mainly explored. The relationship between laser etching parameters and resonant frequency variation was obtained through experiments. Finally, the advantage of laser etching technology was verified with self-made dielectric resonator, which its relative frequency error was less than 0.2%.


Li S.,Zhangzhou Normal College | Li F.,Zhangzhou Normal College | Rao Z.,Zhangzhou Normal College
Sensors and Actuators, B: Chemical | Year: 2010

A highly sensitive gas sensor based on thermal desorption coupled with cataluminescence (TD/CTL) using TiO2-Y2O3 (mass ratio 1:3) as a probe was firstly proposed for the determination of formaldehyde in air. Quantitative analysis was performed at an optimal adsorbent of active carbon, thermal desorption temperature of 140 °C, catalytic temperature of 195 °C, a wavelength of 490 nm and a flow rate of 280 mL/min. The linear range of CTL intensity versus concentration of formaldehyde was 0.026-1.30 mg/m3 (r = 0.9990, n = 7), and the detection limit (3σ) was 0.01 mg/m3. There was no or weak response to foreign substances, such as benzene, ethanol, chloroform, carbon tetrachloride, toluene, dimethylbenzene and n-hexane. This proposed formaldehyde gas sensor showed the high sensitivity, rapid response, good stability, and allowed on-line monitoring of formaldehyde in air. © 2009 Elsevier B.V. All rights reserved.


Ye X.,Zhangzhou Normal College
Frontiers in Energy | Year: 2012

Based on the variable heat capacities of the working fluid, the irreversibility coming from the compression and expansion processes, and the heat leak losses through the cylinder wall, an irreversible cycle model of the Miller heat engine was established, from which expressions for the efficiency and work output of the cycle were derived. The performance characteristic curves of the Miller heat engine were generated through numerical calculation, from which the optimal regions of some main parameters such as the work output, efficiency and pressure ratio were determined. Moreover, the influence of the compression and expansion efficiencies, the variable heat capacities and the heat leak losses on the performance of the cycle was discussed in detail, and consequently, some significant results were obtained. © 2012 Higher Education Press and Springer-Verlag Berlin Heidelberg.

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