JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Zhipeng Li,Shuo Wu,Guizheng Zou
Discriminating the electrochemiluminescence (ECL) of differed luminophores is crucial for ECL multiplexing. However, because of the limited potential window for ECL assay and the overlapped triggering-potential-range between different luminophores, the potential-resolved ECL multiplexing with good resolutions ( R s ) is still a great challenge. Herein, a single anodic ECL from two luminophores in the aqueous solution was discriminated completely (baseline separation, R s ≥ 1.5) in a potential-resolved way with the water-soluble CuInS 2 @ZnS ( [email protected] ) nanocrystals (NCs) and [Ru(bpy) 2 (dcbpy)] 2+ as luminophores and N 2 H 4 as the co-reactant. N 2 H 4 could be electrochemically oxidized to reducing radicals and then reacted with the electrochemically oxidized [email protected] NCs and [Ru(bpy) 2 (dcbpy)] 2+ in sequence to produce co-reactant ECL. The potential-resolved ECL of [email protected] NCs/N 2 H 4 and [Ru(bpy) 2 (dcbpy)] 2+ /N 2 H 4 could be well defined and distinguished from each other upon potential scanning ( R s = 2.60) and utilized for simultaneously determining human prostate specific antigen and carcinoma antigen 125 at the pathological cut-off concentration ( R s = 1.56).
研究领域:
分析化学
·
生物化学
·
材料科学
·
生物医学工程
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Zhiyi Liu,Wentao Niu,Tian Li,Chuanxi Ren,Jun Jing,Yufeng Hu,Donglin Ma,Zhidong Lou,Yu Zhang,Feng Teng
Monolayer molybdenum disulfide (MoS2) is a highly prominent material in optoelectronic devices, yet its intrinsic band structure limits its performance in the near-infrared regime. Here, we demonstrate a high-performance broadband photodetector based on monolayer MoS2 hybridized with eco-friendly CuInS2 quantum dots (CIS-QDs). The Type-II band alignment at the heterojunction interface enables efficient spatial separation of photogenerated carriers, while the CIS-QDs simultaneously passivate surface defects and induce n-type doping in the MoS2 channel. Consequently, the device exhibits a dramatically extended photoresponse spanning ultraviolet (395 nm) to NIR (980 nm), with the photocurrent enhanced by more than 2 orders of magnitude at 980 nm relative to pristine MoS2. The hybrid photodetector achieves a specific detectivity (D*) exceeding 1013 Jones at 395 and 625 nm, and a responsivity improvement of over 1 order of magnitude at 780 nm. These results validate the MoS2/CIS-QD heterostructure as a promising eco-friendly platform for high-performance broadband optoelectronic applications.
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DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Xiaoping Chen,Jianwei Lin,Yafeng Zhuang,Siqi Huang,Jinghua Chen,Zhizhong Han
A new ratiometric fluorescence sensor is prepared for selective detection of chlorotetracycline (CTC) through dual-mode fluorescence method. The sensor is composed of carbon dots (CDs) with blue emission and carboxyl-modified CuInS 2 /ZnS quantum dots (QDs) with dark-red emission. Usually QDs are used as fluorescent probes or signal sources, but it is interesting in this strategy that CuInS 2 /ZnS QDs innovatively work as quenching agent to reduce the fluorescence of CDs, mainly due to the fluorescence resonance energy transfer (FRET). After the addition of CTC, the interaction between CDs and CuInS 2 /ZnS QDs is restrained, resulting in the fluorescence recovery of CDs, whilst the QDs’ fluorescence remains unaffected. In this work, CTC is detected in the range of 0–50 μM by conventional fluorescence and synchronous fluorescence methods under an excitation wavelength of 360 nm or Δλ = 90 nm, and the detection limits of the two methods are 0.46 μM and 0.36 μM, respectively. The designed sensor displays good selectivity compared with other tetracycline drugs with similar structure to CTC, different ions and various natural - amino acids. And the sensor can also be applied to determine CTC in tap water and milk.
研究领域:
分析化学
·
纳米技术
·
环境科学
·
食品科学
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Bing Deng,Yanqing Zhu,Jingling Li,Xia Chen,Kun He,Juan Yang,Kaili Qin,Zhuoneng Bi,Xiudi Xiao,Shuaijun Chen,Xueqing Xu,Gang Xu
The Publisher regrets that this article is an accidental duplication of an article that has already been published in , http://dx.doi.org/10.1016/j.jallcom.2020.155439 . The duplicate article has therefore been withdrawn. The full Elsevier Policy on Article Withdrawal can be found at https://www.elsevier.com/about/our-business/policies/article-withdrawal
研究领域:
材料科学
·
光学工程
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产品关联
DOI
高影响因子
CARBON
·
2015
·
IF 6.196
Weili Meng,Xun Zhou,Zeliang Qiu,Changwen Liu,Junwei Chen,Wenjin Yue,Mingtai Wang,Hong Bi
A hybrid featuring the CuInS 2 quantum dots (CuInS 2 -QDs) on reduced graphene oxide (rGO) sheets is synthesized by a facile one-pot solvothermal approach with thiourea as S source, in which graphene oxide (GO) sheets are reduced into rGO sheets in course of the CuInS 2 -QDs aggregate growth. The growth mechanism of the hybrid is elucidated. It is found that adsorption of Cu 2+ cations mainly takes place at epoxy/hydroxyl groups on GO sheets at room temperature and the adsorbed Cu + cations resulting from the Cu 2+ reduction at solvothermal temperature act as the nucleation for the surface growth of CuInS 2 -QDs into three-dimensional aggregates on GO sheets that are simultaneously reduced into rGO sheets. Our results demonstrate that the rGO/CuInS 2 -QDs hybrid is an effective electron acceptor with a complementary absorption property for polymer-based solar cells. The solar cells based on rGO/CuInS 2 -QDs hybrid and poly(1-methoxy-4-(2-ethylhexyloxy)-p-phenylene vinylene) exhibit an efficiency of 1.5%, much higher than the counterpart devices of rGO sheets. The effects of CuInS 2 -QDs aggregates on device performance are discussed. In the long run, this work provides a potential hybrid electron acceptor for low-cost and efficient solar cell fabrication.
研究领域:
材料科学
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纳米技术
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Liwang Liu,Hong Li,Zirui Liu,Ya-Hong Xie
Colloidal quantum dots (QDs) have attracted a great amount of attention for their appealing optoelectronic properties. In this work, the CuInS 2 (CIS)/ZnS core/shell QDs based on 4.3 nm cores with various layers of ZnS shell (0 to 10) were synthesized. With the sequential growth of a ZnS shell over a CIS core, the band alignment of core/shell QDs converts from a type I to quasi-type II structure. This conversion prolongs the carrier lifetime and affects the electron transfer rate ( K et ) and electron transfer efficiency ( η ET ). A comparative study indicates that the photovoltaic performance of CIS based QDSCs can be markedly improved by optimizing the layers of ZnS shell. The highest photo conversion efficiency (PCE) of 2.07% is obtained at optimum ZnS thickness of about 1.55 nm. These results show tuning the thickness of shell to change the band alignment is an effective strategy to manipulate the carriers transportation behaviors and thus affect the PCE of CIS-based optoelectronic devices.
研究领域:
材料科学
·
光电子学
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产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 9
·1-11
·
IF 5.3
Peng Yuxin,Xie Wanting,Li Lan,Shi Qiang,Yang Xiaoyue,Liu Qian
It is imperative to develop convenient methodology to enable the simultaneous detection of enrofloxacin (ENR) residue markers coexisted in the aquatic environment. To this end, an efficient dual-channel photoelectrochemical (PEC) aptasensing approach is presented for the detection of trace ENR residue markers simultaneously through a single signal acquisition. Primarily, cathodic PEC aptasensing platform with superior anti-interference capability and high sensitivity was designed and constructed on the basis of the high visible light-harvesting CuInS 2 photocathode and Bi 2 S 3 /C 3 N 4 photoanode; and the simultaneous detection of ENR residue markers was then realized by the spatial resolution of aptasensing interfaces. Additionally, systematic verification was performed to investigate the signal modulation mechanism and thermodynamic feasibility of the constructed PEC system, as well as the sensing signals acquired simultaneously endowed by the dual-channel mode. Under the optimal conditions, the developing aptasensing method had a wide linear range for the detection of ENR (0.1 nM–1 μM) and ciprofloxacin (CIP) (50 pM–0.5 μM) with detection limits of 24 pM and 15.5 pM, respectively. High degree of accuracy in the simultaneous detection of ENR residue markers in real water sample was also achieved, which presents a streamlined idea for the simultaneous detection of multiple contaminants in complex samples with a simple approach.
Graphical abstract
研究领域:
分析化学
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环境科学
·
生物传感
·
光电化学
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纳米材料
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食品安全
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水污染检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
·
IF 4.65
Shirong Qin,Kai Li,Jiaqi Zhu,Hanlun Xu,Nasir Ali,Arash Rahimi-Iman,Huizhen Wu
Owing to their extraordinary optoelectronic properties, 2D transition metal dichalcogenides (TMDs) are proved to be promising materials for photodetectors . However, they suffered from poor absorptivity due to their atomically thin profile. Herein, CuInS 2 quantum dots (QDs) and plasmonic Au nanoparticles (AuNPs) were adopted to achieve a MoS 2 -CuInS 2 -AuNPs 2D–0D hybrid by simultaneous deposition of CuInS 2 QDs and AuNPs on the MoS 2 nanosheet . In this configuration, MoS 2 is used as a high mobility carrier transport channel, while CuInS 2 QDs act as an efficient light absorber, and the AuNPs serve as a light sensitizer to enhance the local electric field around MoS 2 and CuInS 2 QDs via surface plasmon resonance (SPR). With such synergism of CuInS 2 QDs and Au NPs, the highest responsivity of 16.65 A W − 1 and D * as high as 2.27 × 10 12 Jones are achieved for the MoS 2 -CuInS 2 -AuNPs hybrid devices under 635 nm laser, which is two orders of magnitude higher than the pristine MoS 2 devices and outperformed most of the other MoS 2 -based photodetectors . Finally, the synergistic effect of the CuInS 2 QDs and Au nanoparticles is illustrated by Finite-Difference Time-domain(FDTD) simulation. The underlying synergism strategy for such a 2D–0D configuration may also be applied to other photo-electric devices.
研究领域:
材料科学
·
光学
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DOI
高影响因子
RSC Advances
·
2014
·Vol. 5
·期 11
·8404-8414
·
IF 3.708
Yongbo Yang,Jinrui Wang,Xiaoda Li,Li Lin,Xiuli Yue
This paper reported the development of a multifunctional contrast agent for near infrared (NIR) fluorescent/ultrasonic bimodal imaging and gene delivery. CuInS2–ZnS alloyed quantum dots (ZCIS QDs) were coated with polyethyleneimine (PEI) to complex plasmid DNA (pDNA), followed by adsorption onto the surface of microbubbles (MBs) generated from the surfactant mixture of Span 60 and Tween 80. It was found that the obtained composite agent of MBs@QDs@PEI/pDNA had excellent capability to enhance both ultrasound and fluorescence imaging. In addition, an in vitro cell experiment showed that pDNA could be released from MBs@QDs@PEI/pDNA and internalized by target HeLa cells to realize a relatively high transfection efficiency by ultrasound-targeted microbubble destruction. Furthermore, the cytotoxicity, immune toxicity and histological evaluation showed that MBs@QDs@PEI/pDNA had a good biocompatibility for medical application. Therefore, such a multifunction agent could operate as a promising platform for targeting gene delivery under the guidance of NIR fluorescent/ultrasonic bimodal imaging.
研究领域:
医学影像
·
基因治疗
·
纳米技术
·
生物医学工程
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2022
·
IF 8.008
Xuwen Gao,Xiancheng Liu,Ying Zeng,Qingqing Zhang,Bin Zhang,Guizheng Zou
The investigation on electrochemiluminescence (ECL) multiplexing bioassays mainly focuses on simultaneously detecting either proteins or nucleic acids. To overcome the limitation of a short waveband for spectrum-resolved ECL multiplexing bioassays, herein, a highly monochromatic (FWHM <40 nm) and bandgap-engineered ECL luminophore, that is, mercaptopropionic acid-capped and Zn2+-mediated aggregation-induced emission (AIE) assembly of Au nanocrystals (NCs) (Zn2+-AIE-AuNCs), of strong emission and the maximum emission wavelength at 485 nm is developed. The highly monochromatic and bandgap-engineered ECL (485 nm) of Zn2+-AIE-AuNCs can multiplex with the single-waveband and surface-defect-involved ECL (775 nm) of dual-stabilizer-capped CuInS2@ZnS NCs (CIS@ZnS-NCs), enabling a spectrum-resolved ECL multiplexing strategy with different NCs luminophores of a similar particle size as tags. This ECL multiplexing strategy can be utilized to simultaneously detect antigen and DNA probe together without any additional signal amplification procedure and obvious spectroscopic cross-talk, in which the highly monochromatic ECL from Zn2+-AIE-AuNCs is utilized to dynamically determine human carcinoembryonic antigen from 1 pg/mL to 50 ng/mL with a limit of detection (LOD) of 0.3 pg/mL, while the single-waveband ECL from CIS@ZnS-NCs is employed to linearly detect wild-type p53 from 1 pM to 50 nM with a LOD of 0.5 pM. The ECL immunoassay of the proposed strategy is free from the interference of the synchronously conducted DNA probe assay and vice versa, which would open an avenue to couple the immunoassay and DNA probe assay together for clinical colon and breast cancer identification.
研究领域:
分析化学
·
生物医学工程
·
纳米技术
·
临床诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Mengyan Wang,Ying Li,Chi Zhang,Gaiping Li,Lina Zou
A sensitive signal-on photoelectrochemical aptasensor for antibiotic determination was constructed based on the energy level matching between ferrocene and CuInS 2 . P-type CuInS 2 microflower was complexed with reduced graphene oxide (CuInS 2 /rGO) to get photocathode current with good photoelectric conversion efficiency and stability. Then, hairpin DNA (HP) was covalently bonded to the electrode surface. A triple helix DNA (THMS) was used as a molecular switch. After the specific recognition between target and THMS in homogeneous solution, ferrocene labeled probe (Fc-T2) was released. Finally, Fc-T2 was captured by the HP, which leaded the obvious increase of photocurrent for the energy level matching between ferrocene and CuInS 2 . The increase of the photocurrent signal was proportional to the concentration of target amoxicillin (AMOX), the linear range was 100 fM-100 nM with detection limit of 19.57 fM. Meanwhile, the method has been successfully applied for milk and lake water samples analysis with satisfactory results.
研究领域:
分析化学
·
生物化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）