Lichun Zhang

Sichuan University, Hua-yang, Sichuan, China

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Publications (37)138.18 Total impact

  • Jie Tang · Hongjie Song · Binrong Zeng · Lichun Zhang · Yi Lv
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    ABSTRACT: A novel gas sensor toward ketones based on cataluminescence generated on the surface of nanosized NaYF4:Er was developed. The sensing materials NaYF4:Er was synthesized by a simple hydrothermal method and characterized by powder X-ray diffraction, scanning electron microscope and energy dispersive X-ray spectroscopy. The effect of Er3+ doping concentration and crystallinity of NaYF4:Er on the CTL intensity were studied. When the Er3+ doping concentration reaches 20%, the materials show excellent sensing characteristics for ketones. Under the optimal experimental conditions, as represented by the acetone and butanone, the gas sensor has fast responses (3 s) and relatively low work temperature (250 °C). The linear range of cataluminescence intensity versus concentration were 2.388-143.28 μg mL-1 for acetone and 2.45-49.0 μg mL-1 for butanone, with a detection limit (signal-to-noise ratio is 3) of 1.7 μg mL-1 and 0.7 μg mL-1, respectively. Foreign 11 substances in common have little interference which indicates the high selectivity of the CTL sensor for ketones.
    No preview · Article · Jan 2016 · Sensors and Actuators B Chemical
  • Xiangyu Wan · Liqian Wu · Lichun Zhang · Hongjie Song · Yi Lv
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    ABSTRACT: In the present work, a novel H2S cataluminescence (CTL) sensor based on metal-organic frameworks (MOFs) was established. Four MOFs, including MIL-100(Fe), MIL-101(Cr), Zn3(BTC)2·12H2O and ZIF-8 were tested as CTL sensing materials. Among them, MIL-100(Fe) showed high CTL intensity for H2S, but it would be damaged after CTL experiment. MIL-101(Cr) showed just a low CTL signal and also destructed after contacting with H2S. Excitingly, Zn3(BTC)2·12H2O and ZIF-8 displayed good sensitivity and stability for H2S. Then, the CTL characteristics and optimal parameters of these two MOFs were investigated in detail and the possible CTL mechanism was also discussed. Under the optimized conditions, the calibration curves of CTL intensity versus H2S concentration have linear regression coefficients (R) of >0.99 at low concentration, which renders MOFs interesting candidates for constructing H2S CTL sensor.
    No preview · Article · Dec 2015 · Sensors and Actuators B Chemical
  • Zixuan Zhan · Jiao Cai · Qi Wang · Yingying Su · Lichun Zhang · Yi Lv
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    ABSTRACT: Fluorescent carbon nanoparticles (CPs), a fascinating class of recently discovered nanocarbons, have been widely known as some of the most promising sensing probes in biological or chemical analysis. In this study, we demonstrate a green synthetic methodology for generating water-soluble CPs with a quantum yield of approximately 24% via a simple heating process using yum mucilage as a carbon source. The prepared carbon nanoparticles with an ~10 nm size possessed excellent fluorescence properties, and the fluorescence of the CPs was strongly quenched by Fe(3+) , and recovered by adenosine triphosphate (ATP), thus, an 'off' and 'on' system can be easily established. This 'CPs-Fe(3+) -ATP' strategy was sensitive and selective at detecting ATP with the linear range of 0.5 µmol L(-1) to 50 µmol L(-1) and with a detection limit of 0.48 µmol L(-1) . Copyright © 2015 John Wiley & Sons, Ltd.
    No preview · Article · Sep 2015 · Luminescence
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    Wei Zhu · Hongjie Song · Lichun Zhang · Yueyang Weng · Yingying Su · Yi Lv
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    ABSTRACT: A novel metal catalytic strategy, arising from the coordinated interaction between metal ions Tin (IV) and ethanolamine, was presented to prepare Nitrogen-rich graphene quantum dots (N-rich GQDs) with excellent luminescence property. In contrast to previous GQDs produced with the bottom-up route, which usually involved in complex and harsh synthetic procedures, we obtained N-rich GQDs using single reactant source under mild reaction condition. Moreover, the prepared N-rich GQDs have shown promising application as fluorescent probe toward folic acid
    Preview · Article · Jul 2015 · RSC Advances
  • Xiaoqing Fan · Yang Feng · Yingying Su · Lichun Zhang · Yi Lv
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    ABSTRACT: A facile, green and one-step synthesis strategy towards highly fluorescent g-CNQDs via solid-phase pyrolyzing melamine and EDTA at low temperature was proposed. The obtained g-CNQDs can produce strong chemiluminescence (CL) in the presence of K3[Fe(CN)6]. The mechanism of the g-CNQDs–K3[Fe(CN)6] CL system was investigated by using CL, UV-Vis absorption, IR, fluorescence and electron spin resonance (ESR) spectrum. The CL emission was probably from the radiative recombination of oxidant-injected holes and the thermally excited electrons in g-CNQDs. The established new CL system was successfully applied to determinate dopamine in the range of 1 × 10−8 to 2 × 10−6 M with a detection limit of 4.7 nM (S/N = 3). The protocol was validated by analyzing serum samples with excellent sensitivity and good recoveries. The new CL system offered a valuable insight for the properties of luminescent g-CNQDs in CL field, and opened a new avenue for its practical applications.
    No preview · Article · Jun 2015 · RSC Advances
  • Lichun Zhang · Hongjie Song · Yingying Su · Yi Lv
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    ABSTRACT: Cataluminescence (CTL) emitted on the surface of solid materials during a catalytic reaction is a very interesting phenomenon, which gives a novel, powerful tool for chemical analysis. Nanomaterial-assisted CTL is a promising transduction principle for gas sensing, and its main features of high sensitivity and long lifetime are also favorable for developing a wide array of analytical devices. This review summarizes advances in nanomaterial-assisted CTL methodologies, including the working mechanism, exploration of sensing materials, innovations in strategy and instrumentation, new types of CTL-based sensing system, and their application to analysis of complex gases and volatile organic compounds. Finally, we discuss some critical challenges and prospects in this field.
    No preview · Article · Feb 2015 · TrAC Trends in Analytical Chemistry
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    Yueyang Weng · Lichun Zhang · Wei Zhu · Yi Lv
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    ABSTRACT: Self-assembly of one-dimensional nanoscale building blocks into functional 2-D or 3-D complex superstructures is of great importance. In this work, we have developed a facile hydrothermal method to synthesize coral-like Zn-doped SnO2 hierarchical structures assembled from nanorods. XRD, SEM, TEM, XPS, FTIR and N2 adsorption–desorption were used to characterize the compositions and microstructures of the samples obtained. The growth mechanism was also explored by investigating the samples synthesized at different reaction time. As sensing materials for cataluminescence (CTL) gas sensor, this coral-like Zn-doped SnO2 demonstrates excellent CTL behaviour (that is, high sensitive, superior selective to 2-butanone compared with other fifteen kinds of common volatile organic compounds (VOCs) as well as fast response and recovery). Three different Zn/Sn molar ratio of SnO2 samples were tested under the same condition to prove the effect of Zn doping concentration on the sensing performance. We further studied the analytical characteristics of the CTL sensor based on 1:10 Zn-doped SnO2 sensing material for 2-butanone under the optimal experimental conditions. The linear range of the gas sensor was 2.31–92.57 µg mL-1 (R= 0.9983), and the detection limit was 0.6 µg mL-1 (S/N=3).
    Preview · Article · Feb 2015
  • Binrong Zeng · Lichun Zhang · Xiangyu Wan · Hongjie Song · Yi Lv
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    ABSTRACT: α-Fe2O3/g-C3N4 composites catalysts were prepared through a facile method of refluxing. Thermogravimetric analysis (TG), powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM) were employed to characterize the as prepared α-Fe2O3/g-C3N4, which displayed distinguished cataluminescence (CTL) properties in the process of detecting H2S gas. When the α-Fe2O3 content in the composite reaches 5.97%, the most outstanding CTL responses are observed. Under the optimized conditions, the linear detection range of the H2S gas sensor was 0.88-7.01 μg mL−1 (r = 0.998) with the detection limit of 0.5 μg mL−1 (S/N = 3). Furthermore, the H2S gas sensor showed superior selectivity to H2S gas compared with other fourteen kinds of common volatile organic compounds (VOCs), as well as fast response (0.1 s) and recovery (0.6 s). These properties render α-Fe2O3/g-C3N4 composite promising candidate for applications in various fields.
    No preview · Article · Feb 2015 · Sensors and Actuators B Chemical
  • Lingzhu Yu · Hongjie Song · Yurong Tang · Lichun Zhang · Yi Lv
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    ABSTRACT: In the present work, we developed a miniaturized tungsten coil device, a cataluminescence gas detector for alcohols and ketones using zinc oxide-doped tin dioxide (SnO2:ZnO) nanowires as the sensing materials. SnO2:ZnO nanowires were controllably deposited on tungsten coil which was coated with Au/reduced graphene oxide composites via an atmospheric pressure chemical vapor deposition process. This SnO2:ZnO nanowires-based gas sensor has fast and sensitive response to alcohols and ketones with a wide range. The response time and recovery time of the present sensor for ethanol were 7s and 40s, respectively. The linear range of ethanol was 11.7-204.7 mu gmL(-1) with a detection limit of 11.0 mu gmL(-1) (S/N = 3). In addition, it has relatively good reproducibility, and its linear response to alcohols and ketones makes it to be promising in practical application.
    No preview · Article · Nov 2014 · Sensors and Actuators B Chemical
  • Xiangyu Wan · Hongjie Song · Di Zhao · Lichun Zhang · Yi Lv
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    ABSTRACT: In the present work, Y-doped metal-organic framework-5 (MOF-5) was synthesized by a simple solvothermal method and characterized by X-ray diffraction, scanning electron microscope, energy dispersive X-ray spectroscopy and nitrogen adsorption-desorption measurements, and firstly used as gas sensor materials based on cataluminescence (CTL). When isobutanol passed through the surface of the material, CTL emission was observed. The luminescence characteristics and optimal parameters were investigated in detail. Under the optimized conditions, the present gas sensor exhibited a linear range of 6.4-80.1 mg L-1 toward isobutanol and with a limit of detection of 3.7 mg L-1. The designed CTL sensor based on Y-doped MOF-5 shows no or weak sensing performance for foreign common volatile organic compounds. Moreover, compared with pure MOF-5, Y-doped MOF-5 exhibited a better CTL response to isobutanol under the same conditions. This work exploits a new application domain of metal-organic frameworks (MOFs).
    No preview · Article · Oct 2014 · Sensors and Actuators B Chemical
  • Shuguang Yan · Lichun Zhang · Yurong Tang · Yi Lv
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    ABSTRACT: Ag2Se quantum dots (QDs) have attracted a lot of interest due to their potential applications in biosensing and bioimaging. A strategy is presented that involves coupling of selenium powder reduction with the binding of silver ions, and thioglycollic acid (TGA) and glycine as stabilizers to obtain ultrasmall Ag2Se QDs at 85 °C in aqueous solution. This strategy avoids high temperatures, high pressures and organic solvents so that water-soluble 3 nm Ag2Se QDs can be directly obtained. The conjugation of ConA to TGA stabilized Ag2Se QDs by hydrogen bonds leads to the adsorption of ConA to Ag2Se QDs and forms the aggregation and leads to the generation of resonance Rayleigh scattering (RRS) as a readout signal for the sensing events. The reaction mechanism of Ag2Se QD RRS enhancement is studied in this work. The resulting RRS sensor enables the detection of ConA with limit of detection reaching 0.08 μg mL(-1) concentration in a wide linear range from 0.27 μg mL(-1) to 35 μg mL(-1). The recovery of spiked ConA in human serum samples ranges from 94% to 106%. The relative standard deviation (RSD) for eleven replicate detections is 3.6%. Our results correlate many important experimental observations and will fuel the further growth of this field.
    No preview · Article · Jun 2014 · The Analyst
  • Lingzhu Yu · Lichun Zhang · Hongjie Song · Xiaoming Jiang · Yi Lv
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    ABSTRACT: A facile catalyst-free atmospheric pressure chemical vapour deposition (APCVD) method for the growth of hierarchical SnO2 architectures on graphene is demonstrated. SnO2 2D nanorod arrays, flower@column composites, dendrite structures, and nanoparticles grown on graphene, named as SnO2/graphene architectures, were synthesized on Thermally-Reduced Graphene Oxide (TRGO) and Chemically-Reduced Graphene Oxide (CRGO), respectively. According to characterizations, the rutile SnO2 architectures had large-area uniformity and high crystallinity, which were highly densely and uniformly grown on graphene. A self-catalyzed vapor-solid (VS) and a self-catalyzed vapor-liquid-solid (VLS) mechanisms were proposed based on the detailed observation on the growth behaviour of the SnO2/graphene materials. The synthesized SnO2/graphene materials were directly used to construct gas sensors for methanol detection based on the cataluminescence (CTL) emission. Further study indicated that the SnO2/graphene materials showed enhanced CTL response to methanol and a morphology-dependent CTL performance. And then a fast and highly effective gas sensor for selective detection of methanol was designed based on the SnO2/graphene nanoparticles. The linear range of the methanol gas sensor was 6.3-88.5 μg mL−1, and the detection limit was 5.2 μg mL−1 (S/N = 3).
    No preview · Article · Apr 2014 · CrystEngComm
  • Yurong Tang · Yingying Su · Na Yang · Lichun Zhang · Yi Lv
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    ABSTRACT: A facile one-step microwave-assisted approach for the preparation of strong fluorescent carbon nitride quantum dots (g-CNQDs) by using guanidine hydrochloride and EDTA as the precursors was developed. Strong chemiluminescence (CL) emission was observed when NaClO was injected into the prepared g-CNQDs and a novel CL system for in direct detection of free chlorine was established. Free residual chlorine in water was sensitively detected with a detection limit of 0.01 μM and had a very wide detection range of 0.02 μM to 10 μM. Based on CL spectral, UV-visible absorption spectral, and electron spin resonance (ESR) spectral studies, as well as investigations on the effects of various free radical scavengers, a possible CL mechanism was proposed. It was suggested that the radiative recombination of oxidant-injected holes and electrons in the g-CNQDs accounted for the CL emission. Meanwhile, 1O2 on the surface of g-CNQDs, generated from some reactive oxygen species in the g-CNQDs-NaClO system, could transfer energy to g-CNQDs and thus further enhanced the CL emission. The CL system is highly sensitive and differentiable, opening a new field for the development of novel CL emitting species, but also expanding the conventional optical utilizations of g-CNQDs.
    No preview · Article · Mar 2014 · Analytical Chemistry
  • Xue Jiao · Lichun Zhang · Yi Lv · Yingying Su
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    ABSTRACT: A novel and highly sensitive gas sensor for alcohols (methanol, ethanol, propanol, isopropanol, butanol, and isobutanol) was proposed based on cataluminescence (CTL) on the surface of nano-CdS. Using cetrimonium bromide (CTAB) as template, the nano-sized sensing material CdS was successfully obtained by a simple hydrothermal synthesis process. The luminescence characteristics and the experiment conditions were investigated in detail. Under the optimized conditions, little interference was observed while eleven foreign substances were passing through the sensor. It demonstrated that this gas sensor has high selectivity for alcohols. The calibration curve (y = kx + b) of the relative CTL intensity versus the concentration of methanol was made, with the linear range of 1.2-76.1 mu g mL(-1) and the detection limit of 0.5 mu g mL(-1) (S/N = 3). The relative standard deviation (R.S.D.) (n=7) of relative cataluminescence intensity for 58.5 mu g mL(-1) methanol was 4.3%. There was no significant change of the catalytic activity of the sensor for a week, with R.S.D. less than 5% by collecting the CTL intensity every hour. The method can be applied to detect alcohols in the air. The possible mechanism of CTL on the surface of nano-CdS was discussed preliminarily.
    No preview · Article · Sep 2013 · Sensors and Actuators B Chemical
  • Yu Zhang · Yurong Tang · Xing Liu · Lichun Zhang · Yi Lv
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    ABSTRACT: At present, glutathione (GSH) is a very important biomarker in vivo. However, the sensitive and selective assay for the detection of GSH in biological matrix still keeps challenging due to the high complexity of samples. Lanthanide-doped upconverting phosphors (UCPs) which exhibit unique near-infrared (NIR) excitation nature are able to overcome interferences from complex samples. In this study, a novel probe based on the linkage of UCPs and dopamine-quinone through hydrogen bonding and electrostatic interaction has been designed for rapid, economic, sensitive and selective detection of GSH in aqueous solution and human blood serum. Here, dopamine-quinone served as an efficient quencher for upconverting fluorescence, while GSH as a strong reducing agent chemically reduced the dopamine-quinone turning on the fluorescence. The fluorescence recovery was found to be proportional to GSH concentration within the range from 1 to 75 μM. The detection limit of this sensor was 0.29 μM, which was quite competitive for GSH detection. The simple, sensitive and selective fluorescence method took full advantages of UCPs properties of low interferences and broadened the application scope of UCPs in complex biological detection.
    No preview · Article · Aug 2013 · Sensors and Actuators B Chemical
  • Tao Liu · Lichun Zhang · Hongjie Song · Zhonghui Wang · Yi Lv
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    ABSTRACT: We report a facile one-pot sonochemical approach to preparing highly water-soluble Ag nanoclusters (NCs) using bovine serum albumin as a stabilizing agent and reducing agent in aqueous solution. Intensive electrogenerated chemiluminescence (ECL) was observed from the as-prepared Ag (NCs) and successfully applied for the ECL detection of dopamine with high sensitivity and a wide detection range. A possible ECL mechanism is proposed for the preparation of Ag NCs. With this method, the dopamine concentration was determined in the range of 8.3 × 10(-9) to 8.3 × 10(-7) mol/L without the obvious interference of uric acid, ascorbic acid and some other neurotransmitters, such as serotonin, epinephrine and norepinephrine, and the detection limit was 9.2 × 10(-10) mol/L at a signal/noise ratio of 3. Copyright © 2013 John Wiley & Sons, Ltd.
    No preview · Article · Jul 2013 · Luminescence
  • Xing Liu · Qi Wang · Yu Zhang · Lichun Zhang · Yingying Su · Yi Lv
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    ABSTRACT: In this paper, a novel and simple colorimetric method for the determination of glutathione (GSH) was developed. The BSA–MnO2 NPs possess oxidase-like activity that can catalyze the oxidization of 3,3′,5,5′-tetramethylbenzidine (TMB), and the existence of GSH can cause reduction of oxidized TMB along with a visual color variation. A good linear relationship can be obtained from 0.26 to 26 μM with a limit of detection of 0.1 μM. Furthermore, the good recoveries for serum samples indicated that the present colorimetric methodology was feasible, simple and sensitive, with a promising application in routine analysis of biosamples.
    No preview · Article · Jun 2013 · New Journal of Chemistry
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    Dongli Deng · Hao Deng · Lichun Zhang · Yingying Su
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    ABSTRACT: A simple and rapid capillary electrophoresis method was developed for the separation and determination of ephedrine (E) and pseudoephedrine (PE) in a buffer solution containing 80 mM of NaH2PO4 (pH 3.0), 15 mM of β-cyclodextrin and 0.3% of hydroxypropyl methylcellulose. The field-amplified sample injection (FASI) technique was applied to the online concentration of the alkaloids. With FASI in the presence of a low conductivity solvent plug (water), an approximately 1,000-fold improvement in sensitivity was achieved without any loss of separation efficiency when compared to conventional sample injection. Under these optimized conditions, a baseline separation of the two analytes was achieved within 16 min and the detection limits for E and PE were 0.7 and 0.6 µg/L, respectively. Without expensive instruments or labeling of the compounds, the limits of detection for E and PE obtained by the proposed method are comparable with (or even lower than) those obtained by capillary electrophoresis laser-induced fluorescence, liquid chromatography–tandem mass spectrometry and gas chromatography–mass spectrometry. The method was validated in terms of precision, linearity and accuracy, and successfully applied for the determination of the two alkaloids in Ephedra herbs.
    Preview · Article · Apr 2013 · Journal of chromatographic science
  • Di Zhao · Hongjie Song · Liying Hao · Xing Liu · Lichun Zhang · Yi Lv
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    ABSTRACT: Water-soluble and luminescent ZnO quantum dots (QDs) capped by (3-aminopropyl) triethoxysilane (APTES) are environment-friendly with strong photoluminescence (max. wavelength: 530nm). Interestingly, it was found that the fluorescence could be quenched by dopamine (DA) directly. On the basis of above, a novel ZnO QDs based fluorescent probe has been successfully designed to detect DA with high selectivity and sensitivity. Moreover, the possible fluorescence quenching mechanism was proposed, which showed that the quenching effect may be caused by the electron transfer from ZnO QDs to oxidized dopamine-quinone. Under optimum conditions, the relative fluorescence intensity was linearly proportional to the concentration of DA within the range from 0.05 to 10μM, with the detection limit down to 12nM (n=3). Also, the selectivity experiment indicated the probe had a high selectivity for DA over a number of possible interfering species. Finally, this method was successfully used to detect DA in serum samples with quantitative recoveries (99-110%). With excellent selectivity and high sensitivity, it is believed that the ZnO QDs based fluorescent probe has a potential for the practical application in clinical analysis.
    No preview · Article · Mar 2013 · Talanta
  • Qi Wang · Xing Liu · Lichun Zhang · Yi Lv
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    ABSTRACT: Carbon nanodots (C-Dots) as a new form of carbonaceous nanomaterials have aroused much interest and intensive research due to their inspiring properties. Compared to traditional semiconductor quantum dots, these newly emergent nanodots possess a number of advantageous characteristics, among which low-toxicity is particularly fascinating. More and more research into C-Dots have focused on synthesis methods and biology-related applications. Microwave-assisted approaches have attracted attention because microwave treatment can provide intensive and efficient energy, and as a consequence shorten the reaction time. In this article, we designed a "green", rapid, eco-friendly and waste-reused approach to synthesize fluorescent and water-soluble C-Dots from eggshell membrane (ESM) ashes according to a microwave-assisted process. ESM selected as the carbon source was a common protein-rich waste in daily life and can be obtained easily and cheaply. The C-Dots from our method showed the maximal fluorescence emission peak at 450 nm and the fluorescence quantum yield was about 14%. We further designed a sensitive probe for glutathione based on the fluorescence turn off and on of the C-Dots-Cu(2+) system, which showed a linear range of 0.5-80 μmol L(-1) and detection limit of 0.48 μmol L(-1). In general, the C-Dots prepared briefly and inexpensively from ESM revealed excellent fluorescent property with promising potential for applications such as sample detection and biotechnology.
    No preview · Article · Oct 2012 · The Analyst