Yingying Su

Sichuan University, Hua-yang, Sichuan, China

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Publications (28)96.63 Total impact

  • 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
  • Na Yang · Hongjie Song · Xiangyu Wan · Xiaoqing Fan · Yingying Su · Yi Lv
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    ABSTRACT: Metal (Co)-Organic Framework (Co-MOF) was first found to catalyze the chemiluminescence (CL) of luminol. On the basis of X-Ray photoelectron spectroscopy, Powder X-Ray diffraction, CL spectral, UV-visible absorption spectral, and electron spin resonance (ESR) spectral studies, as well as the research of the influence of various free radical scavengers, a possible CL mechanism was proposed. The enhanced CL might be attributed to the formation of peroxide analogous complex between the oxygen-related radicals and the active metal site of Co-MOF material. The established Co-MOF-luminol CL system was successfully applied to determine L-csyteine (CySH) based on selective and sensitive enhancing effect of CySH on this CL system. Under the optimized conditions, CySH was selectively detected in the range of 0.1 ~ 10 μM with a detection limit of 18 nM. This novel CL system obviously gives impetus to the new research field of metal-organic frameworks (MOFs) in chemiluminescence.
    No preview · Article · Feb 2015 · The Analyst
  • Yingying Su · Yi Lv
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    ABSTRACT: Due to the high surface area, excellent conductivity, high mechanical strength, and good biocompatibility, graphene has become a growing area of interest since it was first discovered in 2004. Despite these important achievements in the design of fluorescent, colorimetric and electrochemical sensors, the merging of graphene and chemiluminescence (CL) or electrochemiluminescence (ECL), especially CL is still in its infancy. In this review, according to the roles that graphene and its derivatives play in various CL or ECL systems, we discuss the new CL and ECL sensors in particular, in the last two years. Furthermore, we discuss some future prospects and critical challenges in this field. Additionally, possible solutions to overcome these challenges are presented.
    No preview · Article · Nov 2014 · ChemInform
  • Yu Zhang · Liqian Wu · Yurong Tang · Yingying Su · Yi Lv
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    ABSTRACT: A new fluorescent probe for lead ions (Pb2+) was reported in this work. Positively charged UCPs capped with ethylene imine polymer (PEI) and negatively charged AuNPs capped with 11-mercaptoundecanoic acid (MUA) were used as fluorescence donor and acceptor, respectively. The fluorescence quenching process was initiated by the electrostatic interaction between PEI-UCPs and MUA-AuNPs. Upon the addition of Pb2+, functionalized AuNPs were aggregated by an ion-templated chelation process, causing the departure of AuNPs from UCPs. As a result, the fluorescence of the donor was restored and the recovery was found to be proportional within the range of 0.5-10 μM to the concentration of Pb2+. The detection limit was found to be 20 nM. This method was easy to operate with satisfactory selectivity and remarkable sensitivity which would be meaningful in Pb2+-related detection.
    No preview · Article · Sep 2014 · Analytical methods
  • Di Zhao · Xiangyu Wan · Hongjie Song · Liying Hao · Yingying Su · Yi Lv
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    ABSTRACT: In this work, we demonstrated that metal–organic frameworks (MOFs) and ZnO quantum dots (QDs) were successfully employed to design an effective fluorescent sensing platform for phosphate (Pi), thanks to the interactions among the ZnO QDs, MOFs and phosphate ions. The amine–Zn interaction and electrostatic interaction between negatively charged MOFs and positively charged ZnO QDs resulted in the quenching of ZnO QDs fluorescence due to electron-transfer processes, along with the formation of flower-like complex. After introducing Pi ions into the QDs–MOFs system, the burst of Pi ions could inhibit the quenching effect, and recover the fluorescence of ZnO QDs. Furthermore, the fluorescence intensities were dependent on the concentrations of Pi ions and scarcely affected by other possible interfering species. The present fluorescent sensing platform had good sensitivity (the slope of the calibration curve), with a linear range of 0.5–12 μM and detection limit of 53 nM (S/N = 3). The sensing mechanism of Pi was also investigated by scanning electron microscope (SEM) and X-ray diffraction (XRD), and the results indicated that the Pi ions inhibited the quenching effect via breaking the interactions between MOFs and ZnO QDs, and caused the collapsing of MOFs. Finally, the proposed methodology was used satisfactorily for the assessment of Pi in environmental aqueous samples, which opened a new avenue for Pi determination.
    No preview · Article · Jul 2014 · Sensors and Actuators B Chemical
  • Yingying Su · Yani Xie · Xiandeng Hou · Yi Lv
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    ABSTRACT: In recent years, many nanomaterials-assisted chemiluminescence (CL) systems have been developed to improve the sensitivity and to expand the scope of their analytical applications. In these new systems, nanomaterials participate in CL reactions as catalysts, labels, reductants, luminophors, or energy acceptors. This review mainly focuses on the recent analytical applications of metal nanoparticles, magnetic nanoparticles, quantum dots (QDs), and carbon-based nanomaterials (carbon nanotubes and graphene) in liquid-phase CL systems. Recent advances in electrochemiluminescence based on nanotechnology and its analytical applications, especially in immunoassay, DNA analysis, and other biological analyses, are also summarized. Finally, we discuss some critical challenges in this field and speculate about their solutions. A total of 177 references mainly in the last 5 years are included in this review.
    No preview · Article · Apr 2014 · Applied Spectroscopy Reviews
  • 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
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    Qi Wang · Hongjie Song · Yuan Hu · Yingying Su · Yi Lv
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    ABSTRACT: Carbonaceous nanodots (CDs) have drawn increasing attention owing to their inspiring properties. CDs based composites have been attracting extensive research interest because of the properties improvement of materials and introduction of new physical or chemical properties. In this work, we designed a quick, handy and extra-reductant needless method to synthesize Ag@CDs composites according to the direct reduction of Ag(NH3)2OH. TEM, XPS, XRD and optical properties were investigated, and a hypothetical synthesis mechanism was provided. Interestingly, glucose lowered the reaction difficulty and shortened the reaction time, which was well known as silver mirror reaction. Furthermore, a dual signal sensor for glucose was established through optical variations during the synthetic process. The simultaneous synthesis and detection avoided complicated pre-modification of the materials and thus simplified the procedure. The synthesis by a simple elementary reaction and “detection during the synthesis” would attract much interest.
    Preview · Article · Jan 2014 · RSC Advances
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    Liying Hao · Hongjie Song · Yingying Su · Yi Lv
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    ABSTRACT: In this work, a graphene oxide functionalized Zn-based metal-organic framework (ZnMOF) was synthesised under a one-pot condition. This ZnMGO composite had high luminescence and good water dispersibility. The luminescence of the aqueous ZnMGO composite was efficiently and selectively quenched by Cu(2+) ions through interactions between Cu(2+) and the ligand. The detection limit was measured at concentrations as low as 1.00 μM. This robust ZnMGO composite demonstrated a fast response and high sensitivity (Ksv = 3.07 × 10(4) M(-1)) for Cu(2+) ions in aqueous solution. Moreover, the possible luminescence mechanism in terms of energy migration or electron transfer was further explored, and the quenching mechanism was discovered to be based on the collapse of the crystal structure with the help of various characterizations. Remarkably, it is the first time that this excellent ability possessed by the ZnMGO composite has been used to rapidly detect Cu(2+) ions in aqueous solution. The work does not only contribute to extend the potential application of ZnMGO composites, but it also aims to make a contribution within the biological sciences.
    Preview · Article · Dec 2013 · The Analyst
  • Yurong Tang · Hongjie Song · Yingying Su · Yi Lv
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    ABSTRACT: Herein, we present a novel strategy based on a "turn-on" persistent luminescence imaging chemical system of graphitic carbon nitride (g-C3N4) for detecting biothiols in biological fluids. Graphitic carbon nitride (g-C3N4) as persistent luminescence probe is fabricated via a new procedure based on pyrolysis of guanidine hydrochloride under ambient atmospheric conditions. The prepared g-C3N4 nanosheets give intensively long-persistent luminescence that can avoid interference from biological media such as tissue autofluorescence and scattering light. The original persistent luminescence of g-C3N4 turns off due to the adsorption of silver ion (Ag+) onto g-C3N4 materials with an electron transfer process. The presence of biothiols induces the onset of persistent luminescence emission by interrupting the quenching interaction, thereby turning on the imaging probe. The approach exhibits high specificity and high sensitivity to biothiols with low detection limit for cysteine (Cys), homocysteine (Hcy), and glutathione (GSH) with 6.4, 8.1, and 9.6 nM, respectively. It is also successfully applied for imaging detection of biothiols in human urine, plasma, and cell lysates, demonstrating its great value of practical application in biological systems.
    No preview · Article · Nov 2013 · Analytical Chemistry
  • Yurong Tang · Yu Zhang · Yingying Su · Yi Lv
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    ABSTRACT: Ag nanoclusters (NCs) possessed distinct physical and chemical attributes that made them excellent scaffolds for the development of novel bio-analytical methodology. In the present work, a green approach for the preparation of Ag nanoclusters (NCs) was proposed on the basis of templated polyethyleneimine (PEI) assisted in-situ reductive crystallization of Ag (I), and then a sensitive resonance light scattering bioassay for the determination of heparin was established on the basis of the enhanced resonance light scattering of the PEI-capped Ag NCs during the presence of heparin. Further investigation indicated that the molecular weight of PEI, the PEI/Ag (I) ratio and the pH value of reaction conditions had great influence on the formation of Ag NCs, which was directly correlated to resonance light scattering. The bioassay allows sensitive and selective detection of heparin with a detection limit of 27.5nM, and successfully applied for the determination of heparin in human serum samples.
    No preview · Article · Oct 2013 · Talanta
  • Tao Liu · Yingying Su · Hongjie Song · Yi Lv
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    ABSTRACT: In this article, we established a fluorescent chiral recognition and detection method for cysteine based on the l-glutathione (l-GSH)-stabilized Ag nanoclusters (AgNCs) with high selectivity and sensitivity. A fast and green microwave (MW)-assisted strategy has been employed for synthesizing water-soluble fluorescent l-GSH-AgNCs. The reaction time was shortened from hours to several minutes. The synthetic process utilized l-glutathione as a stabilizing agent and a reducing agent without any other toxic reducing agent, such as NaBH4 or N2H4. The method is environmental friendly. Due to the different responses to AgNCs from chiral cysteine, we found d-cysteine hardly affects the fluorescence intensity of the AgNCs, whereas l-cysteine distinctly weakened its fluorescence intensity. This experiment indicated that fluorescence quenching efficiency of AgNCs was proportional to the concentration of l-cysteine in the range from 0.025 to 50 μmol L(-1).
    No preview · Article · Sep 2013 · The Analyst
  • 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
  • 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
  • Pingyang Cai · Wei Bai · Lichun Zhang · Hongjie Song · Yingying Su · Yi Lv
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    ABSTRACT: In the present work, In2O3 hierarchical hollow microsphere and flower-like microstructure were achieved controllably by a hydrothermal process in the sodium dodecyl sulfate (SDS)-N,N-dimethyl-formamide (DMF) system. XRD, SEM, HRTEM and N2 adsorption measurements were used to characterize the as-prepared indium oxide materials and the possible mechanism for the microstructures formation was briefly discussed. The cataluminescence gas sensor based on the as-prepared In2O3 was utilized to detect H2S concentrations in flowing air. Comparative gas sensing results revealed that the sensor based on hierarchical hollow microsphere exhibited much higher sensing sensitivity in detecting H2S gas than the sensor based on flower-like microstructure. The present gas sensor had a fast response time of 5 s and a recovery time of less than 25 s, furthermore, the cataluminescence intensity vs. H2S concentration was linear in range of 2–20 μg mL−1 with a detection limit of 0.5 μg mL−1. The present highly sensitive, fast-responding, and low-cost In2O3-based gas sensor for H2S would have many practical applications.
    No preview · Article · Sep 2012 · Materials Research Bulletin
  • Xing Liu · Qi Wang · Huihui Zhao · Lichun Zhang · Yingying Su · Yi Lv
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    ABSTRACT: Inorganic nanomaterials that mimic enzymes are fascinating as they potentially have improved properties relative to native enzymes, such as greater resistance to extremes of pH and temperature and lower sensitivity to proteases. Although many artificial enzymes have been investigated, searching for highly-efficient and stable catalysts is still of great interest. In this paper, we first demonstrated that bovine serum albumin (BSA)-stabilized MnO(2) nanoparticles (NPs) exhibited highly peroxidase-, oxidase-, and catalase-like activities. The activities of the BSA-MnO(2) NPs were evaluated using the typical horseradish peroxidase (HRP) substrates o-phenylenediamine (OPD) and 3,3',5,5'-tetramethylbenzidine (TMB) in the presence of either hydrogen peroxide or dissolved oxygen. These small-sized BSA-MnO(2) NPs with good dispersion, solubility and biocompatibility exhibited typical Michaelis-Menten kinetics and high affinity for H(2)O(2), OPD and TMB, indicating that BSA-MnO(2) NPs can be used as satisfactory enzyme mimics. Based on these findings, BSA-MnO(2) NPs were used as colorimetric immunoassay tags for the detection of goat anti-human IgG in place of HRP. The colorimetric immunoassay using BSA-MnO(2) NPs has the advantages of being fast, robust, inexpensive, easily prepared and with no HRP and H(2)O(2) being needed. These water-soluble BSA-MnO(2) NPs may have promising potential applications in biotechnology, bioassays, and biomedicine.
    No preview · Article · Aug 2012 · The Analyst