Bin Liu

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Organization: Huaqiao University

Department: College of Materials Science and Engineering

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TOPICS

Polymer

Stimuli Responsive Polymers Stimuli Responsive Polymers UV Absorbents Photo Responsive Polymers

Chemicals
References

Dual fluorescence self-assembled multilayers bearing a fluorescent internal standard for interfacial sensing

Co-reporter:Xiangying Sun;Zhifang Wang ;Hui Liu

Luminescence 2011 Volume 26( Issue 4) pp:239-243

Publication Date(Web):

DOI:10.1002/bio.1216

Abstract

A novel dual fluorescence film Quartz/PSS/AO/PSS/CS/CdTe sensor was constructed based on layer-layer electrostatic attraction using CdTe as a fluorescence probe. Acridine orange is shielded effectively by sodium poly(4-styrenesulfonate) and chitosan, thus its fluorescence intensity does not change in the presence of the analyte, thereby acting as a fluorescent internal standard providing a reference signal. The ratio of dual fluorescence intensities of the film sensor is not affected by the fluctuation of the external environment factors such as excitation intensity, detector voltage of photo multiplier tube and sensor position in the cell holder. Assays based on this dual fluorescence self-assembled multilayers sensor afforded an extremely high sensitivity for DNA with greatly accuracy. Copyright © 2010 John Wiley & Sons, Ltd.

Rhodamine B aggregation in self-assembled multilayers induced by polyelectrolyte and interfacial fluorescence recognition for DNA

Co-reporter:Sun Xiangying, Liu Bin, Zhang Ying

Talanta 2011 Volume 85(Issue 2) pp:1187-1192

Publication Date(Web):15 August 2011

DOI:10.1016/j.talanta.2011.05.035

Photophysical properties of Rhodamine B bound to water-soluble polyanion sodium poly(4-styrenesulfonate) (PSS) in solution and Quartz/APES/PSS/RB SAMs were investigated. Experiments showed that Rhodamine B aggregated in Quartz/APES/PSS/RB SAMs and its fluorescence behavior was different from that in Quartz/APES/RB SAMs without PSS. The constructed Quartz/APES/PSS/RB SAMs were applied for label-free interfacial fluorescence sensing of DNA with extremely high sensitivity.

Fluorescent Recognition for Single- and Double-Stranded Oligonucleotides Based on Rhodamine B-Modified Self-assembled Bilayers

Co-reporter:Ying ZHANG, Xiang-Ying SUN, Bin LIU

Chinese Journal of Analytical Chemistry 2009 Volume 37(Issue 5) pp:665-670

Publication Date(Web):May 2009

DOI:10.1016/S1872-2040(08)60103-6

Rhodamine B (RB) was assembled onto the surface of quartz substrate by electrostatic interaction between the fluorescence reagent RB and γ-aminopropyltriethoxysilane (APES), and the Quartz/APES/RB film was constructed. The fluorescence spectra and binding interaction of Quartz/APES/RB with single- and double- stranded oligonucleotides (ssDNA and dsDNA) in Tris-HCl buffer solution of pH 7.4 were studied. The conditions of establishment, fluorescent characterization of self-assembled bilayers, binding reaction mechanism between DNA and Quartz/APES/RB were discussed in detail. The experiment results show that the Quartz/APES/RB was allowed for an extremely highly sensitive fluorescent recognition for ssDNA and dsDNA with the detection limit of 2.4 ng l−1 and 0.85 ng l−1, respectively.

A novel biosensor for bovine serum albumin based on fluorescent self-assembled sandwich bilayers

Co-reporter:Xiangying Sun ;Fei He

Luminescence 2009 Volume 24( Issue 1) pp:62-66

Publication Date(Web):

DOI:10.1002/bio.1066

Abstract

Fluorescent dyes butyl rhodamine B were assembled via a dl-cystenine intermediate onto quartz wafers whose surface had first adsorbed gold nanoparticles. Hence self-assembled sandwich bilayers with nanocomposite structure were constructed which can be used as a biosensor for bovine serum albumin. The biosensor-based self-assembled monolayers (SAMs) are regenerable and have high sensitivity, five orders of magnitude higher than that of bulk solution phase sensing. The effects of existing forms of dyes on the fluorescence spectra of bilayers in the presence of bovine serum albumin were investigated. Copyright © 2008 John Wiley & Sons, Ltd.

Design of fluorescent self-assembled multilayers and interfacial sensing for organophosphorus pesticides

Co-reporter:Xiangying Sun, Kaihao Xia, Bin Liu

Talanta 2008 Volume 76(Issue 4) pp:747-751

Publication Date(Web):15 August 2008

DOI:10.1016/j.talanta.2008.04.020

This paper details the fabrication of indole (ID) self-assembled multilayers (SAMs) and fluorescence interfacial sensing for organophosphorus (OP) pesticides. Quartz/APES/AuNP/l-Cys/ID film was constructed on l-cysteine modified Quartz/APES/AuNP surface via electrostatic attraction between ID and l-cysteine. Cyclic voltammetry indicates that ID is immobilized successfully on the gold surface. Fluorescence of the Quartz/APES/AuNP/l-Cys/ID film shows sensitive response toward OPs. The fluorescent sensing conditions of the SAMs are optimized that allow linear fluorescence response for methylparathion and monocrotophos over 5.97 × 10−7 to 3.51 × 10−6 g L−1 and 3.98 × 10−6 to 3.47 × 10−5 g L−1, with detection limit of 6.1 × 10−8 gL−1 and 3.28 × 10−6 gL−1, respectively. Compared to bulk phase detection, interfacial fluorescence sensing based on the SAMs technology shows higher sensitivity by at least 2 order of magnitude.

Preparation and characterization of a Cu2+ chemosensor based on fluorescent self-assembled sandwich bilayers

Co-reporter:Bin Liu, Xiangying Sun, Fei He

Thin Solid Films 2008 Volume 516(Issue 8) pp:2213-2217

Publication Date(Web):29 February 2008

DOI:10.1016/j.tsf.2007.07.154

Fluorescent reagent sodium 1-naphthylamine diacetate was assembled onto quartz wafer surface via its electrostatic interaction with cysteine that was directly assembled on gold nanoparticles adsorbed at quartz surface. Formation of the self-assembled bilayers was confirmed and primarily characterized by absorption and fluorescence spectra. Strong fluorescence was observed from the quartz surface and was found highly efficiently quenched by Cu2+ that allowed for a highly sensitive detection of Cu2+.

Influence of N-substituent and solvent on internal conversion in 1-aminonaphthalenes

Co-reporter:Xiangying Sun, Zhen-Chang Wen, Yun-Bao Jiang

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 2007 Volume 68(Issue 2) pp:220-224

Publication Date(Web):October 2007

DOI:10.1016/j.saa.2006.11.017

N-Methyl-N-methoxycarbonylmethyl-1-aminonaphthalene (MMAN) and N,N-dimethoxycarbonylmethyl-1-aminonaphthalene (DCAN) were synthesized and their fluorescence and absorption spectra in solvents of varied polarity were investigated and compared to those of 1-dimethylaminonaphthylene (DMAN). The data were discussed in terms of the N-substitution effects on the internal conversion (IC). Results showed that the IC was enhanced when the N-methyl group in DMAN was replaced by N-CH2CO2CH3.

The fluorescence sensor for saccharide based on internal conversion

Co-reporter:Xiang-Ying Sun

Luminescence 2005 Volume 20(Issue 4‐5) pp:331-333

Publication Date(Web):31 AUG 2005

DOI:10.1002/bio.841

In this paper, an internal conversion (IC) fluorescence probe N-(o-boronic acid)benzyl-1-naphthylamine (BBNA) was prepared from 1-naphthylamine and 2-formylbenzeneboronic acid. The fluorescence parameters of BBNA were investigated in a variety of solvents. When BBNA interacted with d-fructose in phosphate buffer solution of 30% MeOH, pH 8.21 (v/v), the fluorescence intensity increased and emission maximum red-shifted slightly with increasing d-fructose concentration. In the presence of d-fructose, the fluorescence quantum yield of BBNA increased with increasing solvent polarity, suggesting that internal conversion (IC) occurred with BBNA. The binding force of BBNA with d-fructose was the strongest, and the stability constant (K) of d-fructose was 99.9 mol/L. Therefore, a selective recognition system based on IC was constructed for d-fructose. Copyright © 2005 John Wiley & Sons, Ltd.

An extremely sensitive monoboronic acid based fluorescent sensor for glucose

Co-reporter:Xiang-Ying Sun, Bin Liu, Yun-Bao Jiang

Analytica Chimica Acta 2004 Volume 515(Issue 2) pp:285-290

Publication Date(Web):12 July 2004

DOI:10.1016/j.aca.2004.03.073

An extremely sensitive monoboronic acid based fluorescent sensor for glucose was developed. This was carried out by assembling a fluorescent monoboronic acid, 3-aminophenylboronic acid (PBA) indirectly onto gold surface via its electrostatic interaction with cysteine (Cys) that was directly assembled on the gold surface. The formation of self-assembled bilayers (SAB) was confirmed and primarily characterized by cyclic voltammetry and X-ray photoelectron spectra (XPS). The SAB containing PBA was found fluorescent and its fluorescence showed an extremely high sensitivity to the presence of glucose and other monosaccharides such as galactose and fructose with quenching constants at 108 M−1 order of magnitude compared to those at 102 M−1 in bulk solutions. The quenching constants were found to vary in the order of that is different from that in bulk solution which shows the highest binding affinity toward d-fructose and very low sensitivity toward glucose. The reported monoboronic acid based SAB fluorescent sensor showed the highest sensitivity towards glucose with the capacity of detecting saccharides of concentration down to nanomolar level. It was also demonstrated that the fluorescence from PBA/Cys/Au can be easily recovered after each measurement event and therefore also represents a new reusable method for immobilizing reagent in fabricating chemosensors.

A novel fluorometric detection of Cu2+ based on self-assembled bilayers

Co-reporter:Xiang-Ying Sun, Bin Liu, Wen-Ting Weng, Yun-Bao Jiang

Talanta 2004 Volume 62(Issue 5) pp:1035-1040

Publication Date(Web):19 April 2004

DOI:10.1016/j.talanta.2003.10.029

Fluorescent reagent sodium 1-naphthylamine diacetate (NADA) was assembled onto gold electrodes via its electrostatic interaction with cysteine (Cys) that was directly assembled on the gold electrode surface. Formation of the self-assembled bilayers was confirmed and primarily characterized by cyclic voltammetry and X-ray photoelectron spectra (XPS). The Cys modification of the gold electrode prevented direct adsorption of NADA onto the gold electrode and hence eliminated fluorescence quenching by gold. Strong fluorescence was observed from the NADA self-assembled bilayers at gold surface and was highly efficiently quenched by Cu2+ that allowed for an extremely highly sensitive detection of Cu2+ with a detection limit of 0.2 ppt and quantitative detection range of 0.5–9 ppt. The fluorescence from NADA/Cys/Au can be easily regenerated and therefore the present report showed a reusable method for immobilizing reagent in fabricating fluorescent chemosensors.