Qingyun Liu's research while affiliated with Shandong University of Science and Technology and other places
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Publications (22)
There is an ongoing need to develop high-performance sensing strategy for detecting and discriminating antioxidants, primarily because of their role in medical diagnosis and food. In this regard, visual sensor arrays have been a subject of intensive research for such applications. To this end, we propose a colorimetric sensor array for accurate det...
A colorimetric array for metal ions is described that is based on the de-aggregation of papain-capped gold nanoparticles (AuNPs) for discrimination of metal ions. The functionalized AuNPs were used as colorimetric probes, and three chelating agents (tripolyphosphate, citrate, and ethylenediamine tetraacetate were employed as the recognition recepto...
An optical method for determination of Hg(II) is described that exploits the aggregation of gold nanoparticles (AuNPs) under dark-field microscope (DFM) observation. This assay is based on the use of a Hg(II)-specific aptamer, AuNPs modified with complementary DNA strands, and exonuclease I (Exo I). In the absence of Hg(II), the added dsDNA prevent...
There is a growing interest in developing high-performance sensor array for detection and discrimination of antioxidants owing to their widespread use and essential role on human body. The present work unveils a novel colorimetric sensor array for colorimetric discrimination of antioxidants based on the red, green, and blue alterations (ΔRGB) patte...
A colorimetric method is presented for ultrasensitive determination of adenosine. The assay is based on side-by-side self-assembly of aptamer-functionalized gold nanorods (Au NRs). It relies on the fact that the conjugation of the helper DNA predominantly occurs at the terminal ends of the Au NRs rather than at their sides. The adenosine aptamers c...
We propose a sensitive colorimetric method for the detection of P2O7⁴⁻ and pyrophosphatase (PPase). Without Na4P2O7 and PPase, under the catalysis of gold nanoparticles (AuNPs), Cu(II) can be reduced to Cu by nicotinamide adenine dinucleotide (NADH), leading to the Cu-coating onto the surfaces of AuNPs, accompanied by the color change from green to...
Proteins play a key role in disease diagnosis, and protein discrimination is an important but difficult issue. Here, we report a novel strategy for strengthening the protein discrimination through a facile colorimetric sensor array, which is based on DNA-gold nanoparticle (AuNP) conjugates manipulated by exonuclease I (Exo I). Different proteins ex...
The development of potassium-ion batteries (KIBs)are hampered by the lack of appropriate electrode materials allowing for the reversible insertion/de-insertion of the large K-ion. Iodine, as a conversion-type cathode for rechargeable batteries, has high theoretical capacity and excellent electrochemical reversibility, making it a potential cathode...
We herein present a simple, low-cost, and ultrasensitive colorimetric sensing strategy for the detection of mercury ions (Hg ²⁺ ) that takes advantage of the natural pore structure in rose petals to encapsulate gold nanoparticles (AuNPs). AuNPs easily aggregate in high salt concentrations, which restrict their application, for example, as a catalys...
The 3D ZnO/ZnFe2O4/graphene foam (ZZFO/GF) was successfully prepared by template method and hydrothermal process as a sensing platform for colorimetric detection of hydroquinone (HQ). It is found that the foam exhibited improved peroxidase-like activity that could quickly catalyze 3,3′,5,5′-tetramethylbenzidine (TMB) in the presence of H2O2 and pro...
Breaking the restrictions of a lock-and-key sensing strategy which relies only on the most dominant interactions between the sensing element and target, here, we develop a colorimetric sensor array with three kinds of cationic polymers (polydiallyl dimethylammonium chloride (PDDA), chitosan (CTS), and cetyltrimethylammonium bromide (CTAB)) as nonsp...
In medicine, the detection and identification of biothiols have received increasing attention due to their crucial roles in life activities. Hence, we present a facile, rapid, and effective method for identification of five kinds of biothiols including glutathione (GSH), L-cysteine (Cys), dithiothreitol (DTT), 2-mercaptoethanol (MCE), and 3-mercapt...
Here, for the first time, we present a colorimetric sensor array toward sensitive protein discrimination based on a novel strategy of diverse DNA-protein interactions with the performance of iodide-responsive Cu-Au nanoparticles (NPs). Different steric hindrance effects generated from differential interactions of DNA and proteins inhibit the access...
We report for the first time that CoSe with tetragonal metallic phase exhibits high electrocatalytic activity for hydrogen evolution reaction (HER) in acid solution. The prepared tetragonal CoSe exhibits an overpotential of 175 mV versus reversible hydrogen electrode at j = −10 mA cm⁻² and a notably low Tafel slope of 36.3 mV dec⁻¹, which are consi...
A rapid, highly sensitive and selective colorimetric assay is presented for visually detecting L-histidine. It is based on L-histidine-triggered self-cleavage of DNA duplex-induced gold nanoparticle (AuNP) aggregation. The citrate-capped AuNPs easily aggregate in a high concentration of salt environment. However, in the presence of L-histidine apta...
We present an ultrasensitive colorimetric nucleic acid assay based on intensity of gold nanoparticles (Au NPs) by dark field microscopy. In the absence of target DNA, two hairpin-like DNA strands with protrudent single-stranded DNA (ssDNA) can be absorbed on Au NP surface via non-covalent interactions between the exposed nitrogen bases of ssDNA and...
We develop a simple but efficient assay platform for thrombin detection with ultrahigh sensitivity, which is based on intensity of gold nanoparticle (AuNP) oligomers as optical readout mode. Capture of the two aptamers to the same thrombin molecule induces the hybridization between the two aptamers, and thereby brings the AuNPs linked at one end of...
We present a simple and efficient colorimetric assay strategy for ultrasensitive visual detection of human α-thrombin, which is essentially based on the formation of the DNA1-thrombin-DNA2 sandwich complex-bridged gold nanoparticle (Au NP) oligomers. Unlike the traditional colorimetric sensing strategies which induced the nanoparticle aggregates wi...
In the present work, we report a novel colorimetric sensor array for rapid identification of heavy metal ions. Three kinds of thiols were used as sensing elements. Due to the different binding ability between thiols and metal ions affected by sulfhy-dryl group, as well as carboxyl group and amino group, the activity of urease changed from inactivat...
The authors present a colorimetric method for the quantification of Ni(II) at nanomolar levels. It is based on the use of iodide-responsive copper-gold nanoparticles (Cu-Au NPs) combined with the Ni(II)-catalyzed glutathione (GSH)-oxygen reaction system. In the presence of Ni(II), the catalytic reaction between GSH and oxygen is can triggered. This...
A colorimetric method is described for sensitive and low-cost detection of Cd(II). It is based on the use of triangular silver nanoplates (tri-AgNPs) modified with 1-amino-2-naphthol-4-sulfonate (ANS) acting as a colorimetric probe. ANS is first linked to the tri-AgNPs via electrostatic interaction of the sulfo groups. In the absence of analyte, AN...
Herein, we present a novel gold nanoparticle (AuNP) enumeration-based colorimetric aptamer biosensor for ultrasensitive detection of nucleic acid. This AuNP enumeration based colorimetric method takes advantages of the distinctive and strong localized surface plasmon resonance light scattering with the dark-field microscope. In our model system, fi...
Citations
... A low-dose multi-antioxidant supplementation may contribute to a reduction in platelet activation, which is beneficial for cardiovascular function [31]. Linear discriminant analysis and centroid diagrams showed that the sensor array can well detect and discriminate the antioxidants, namely, lipoic acid, cysteine, tannin, ascorbic acid, glutathione, uric acid, glycine and dopamine, with high sensitivity in the range of nanomolar concentrations [32]. Birinci et al. [33] found that quercetin (Q) and quercetin-conjugated titanium dioxide (TiO 2 )nanoparticles (QTiO 2 ) nano-antioxidants promoted high quercetin bioavailability and stability in cells with maximal antioxidant potency against reactive oxygen species (ROS), with no signs of cytotoxicity. ...
... It is common to build aggregation-based detection sensors because of fast chelation reactions between AuNPs and metal ions. Also, researchers have developed multiplex colorimetric systems for simultaneous detection of groups of ions, including Fe 3þ , Cr 3þ , Co 2þ , Mg 2þ , Pb 2þ , Ca 2þ , Zn 2þ , Ti 4þ , and Sn 4þ , [202] Hg 2þ , Cd 2þ , Pb 2þ and Cu 2þ , [203] Ti 4þ , Cr 3þ , Mn 2þ , Fe 3þ , Pb 2þ , and Sn 4þ , [204] Pb 2þ and Cr 3þ , [205] Hg 2þ and As 3þ . [206] As a principle, AuNPs were decorated with "suitable" multiple colorimetric chelators and used under optimized conditions to achieve the detection of the target analytes. ...
... To improve the sensitivity, some simple devices can be used in combination with Exo I. For example, Li; et al. developed an optical ultrasensitive DNA biosensor to detect Hg 2+ by using dark-field microscope and Exo I [56]. In this biosensor, the complementary strand of Hg 2+ aptamer was modified on the AuNPs. ...
... In particular, bimetal core-shell NPs, such as Au@Ag NPs and Cu@Au NPs, have attracted great attention because of their unique photophysical properties, which are different from their respective metal NPs Gilroy et al. 2016;Ghosh Chaudhuri 2012). As far as we know, the colorimetric sensing arrays based on Au@Ag NPs have been reported (Li et al. 2019d;Li et al. 2019e), while the Cu@AuNPs-based colorimetric sensor arrays have not been reported. ...
... It is worth pointing out that not only was the red-shift of the scattering spectrum from the Au NPs, but the scattering intensity from individual particles also gradually increased, which was in good agreement with the results from the bulk solution measurements. Similarly, Chen and co-workers developed a simple, ultrasensitive, and highly selective single particle-based dark-field method for colorimetric detection of pyrophosphate ions and pyrophosphatase [50]. ...
... Importantly, the AD-binding DNA aptamer has been extensively used as a model aptamer for the development of aptasensors that employ numerous techniques and materials [12]. For example, various AD aptasensors were developed utilizing (1) colorimetric analysis with gold nanoparticles [13] or nanorods [14], (2) fluorometric measurement with carbon quantum dots [15], and (3) electrochemical techniques with ZnNi MOF microspheres [16]. Unfortunately, many of the current AD aptasensors can still be expensive and too complex to use. ...
... In addition, AuNPs-DNA conjugates could effectively distinguish various proteins and showed a different colorimetric response. Based on the different aggregation behaviors of AuNPs-DNA conjugates in the presence of proteins and exonuclease I (Exo I) in the NaCl environment, Chen et al. [147] reported a colorimetric sensor assay for the distinguishing of different proteins ( Figure 11). Due to the diverse affinities between different proteins and DNA immobilized on the AuNPs surface through the Au-S bond, the DNA-protein binding was resistant to the digestion of Exo I and protected AuNPs from aggregation in the high concentration of the NaCl solution. ...
... From Figure 3A, it is clear that sBMP responded to arsenite, Hg(II), and Pb(II), which means Hg(II) and Pb(II) are potential interfering ions. The reason could be the formation of amalgam, which changed the surface composi-tion of AuNPs [28]. sBMP had no response towards As(V), Cd(II), Br − , Na(I), I − , Zn(II), and Cr(VI), indicating that they are not potential interfering ions. ...
... The linear range and detection limit of various sensing systems for HQ detection are listed in Table 1. Compared with other platform, such as ZZFO/GF [47], GCN-Cu NFs [48], and GMC/GCE [49], the colorimetric sensing platform based on Pt-MoS 2 /SiO 2 has a relatively lower LOD for HQ. ...
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... In the past decade, the fluorescent sensor array (FSA) has been developed for the general detection, discrimination, and quantification of analytes in the liquid phase [11][12][13]. This sensor-based method in which fluorescent changes in a cross-responsive array constitute a fluorescent data similar to that produced by the human olfactory system. ...
