1
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Young HL, Gomez ED, Schaak RE. Thermally Induced Domain Migration and Interfacial Restructuring in Cation Exchanged ZnS-Cu 1.8S Heterostructured Nanorods. J Am Chem Soc 2023; 145:23321-23333. [PMID: 37818621 DOI: 10.1021/jacs.3c08765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/12/2023]
Abstract
Partial cation exchange reactions can be used to rationally design and synthesize heterostructured nanoparticles that are useful targets for applications in photocatalysis, nanophotonics, thermoelectrics, and medicine. Such reactions introduce intraparticle frameworks that define the spatial arrangements of different materials within a heterostructured nanoparticle, as well as the orientations and locations of their interfaces. Here, we show that upon heating to temperatures relevant to their synthesis and applications, the ZnS regions and Cu1.8S/ZnS interfaces of heterostructured ZnS-Cu1.8S nanorods migrate and restructure. We first use partial cation exchange reactions to synthesize a library of seven distinct samples containing various patches, bands, and tips of ZnS embedded within Cu1.8S nanorods. Upon annealing in solution or in air, ex situ TEM analysis shows evidence that the ZnS domains migrate in different ways, depending upon their sizes and locations. Using differential scanning calorimetry, we correlate the threshold temperature for ZnS migration to the superionic transition temperature of Cu1.8S, which facilitates rapid diffusion throughout the nanorods. We then use in situ thermal TEM to study the evolution of individual ZnS-Cu1.8S nanorods upon heating. We find that ZnS domain migration occurs through a ripening process that minimizes small patches with higher-energy interfaces in favor of larger bands and tips having lower-energy interfaces, as well as through restructuring of higher-energy Cu1.8S/ZnS interfaces. Notably, Cu1.8S nanorods containing multiple patches of ZnS thermally transform into ZnS-Cu1.8S heterostructured nanorods having ZnS tips and/or central bands, which provides mechanistic insights into how these commonly observed products form during synthesis.
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2
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Xiao R, Zeng J, Li F, Ling D. Gold-semiconductor nanohybrids as advanced phototherapeutics. Nanomedicine (Lond) 2023; 18:1585-1606. [PMID: 37830425 DOI: 10.2217/nnm-2023-0118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2023] Open
Abstract
Phototherapeutics is gaining momentum as a mainstream treatment for cancer, with gold-semiconductor nanocomposites showing promise as potent phototherapeutic agents due to their structural tunability, biocompatibility and functional diversity. Such nanohybrids possess plasmonic characteristics in the presence of gold and the catalytic nature of semiconductor units, as well as the unexpected physicochemical properties arising from the contact interface. This perspective provides an overview of the latest research on gold-semiconductor nanocomposites for photodynamic, photothermal and photocatalytic therapy. The relationship between the spatial configuration of these nanohybrids and their practical performance was explored to deliver comprehensive insights and guidance for the design and fabrication of novel composite nanoplatforms to enhance the efficiency of phototherapeutics, promoting the development of nanotechnology-based advanced biomedical applications.
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Affiliation(s)
- Ruixue Xiao
- Frontiers Science Center for Transformative Molecules, School of Chemistry & Chemical Engineering, National Center for Translational Medicine, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Jian Zeng
- Zhejiang Cancer Hospital, Hangzhou, 310022, PR China
| | - Fangyuan Li
- Institute of Pharmaceutics, Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, PR China
- World Laureates Association (WLA) Laboratories, Shanghai, 201203, PR China
| | - Daishun Ling
- Frontiers Science Center for Transformative Molecules, School of Chemistry & Chemical Engineering, National Center for Translational Medicine, Shanghai Jiao Tong University, Shanghai, 200240, PR China
- Institute of Pharmaceutics, Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, PR China
- World Laureates Association (WLA) Laboratories, Shanghai, 201203, PR China
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3
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Ben-Shahar Y, Stone D, Banin U. Rich Landscape of Colloidal Semiconductor-Metal Hybrid Nanostructures: Synthesis, Synergetic Characteristics, and Emerging Applications. Chem Rev 2023; 123:3790-3851. [PMID: 36735598 PMCID: PMC10103135 DOI: 10.1021/acs.chemrev.2c00770] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Nanochemistry provides powerful synthetic tools allowing one to combine different materials on a single nanostructure, thus unfolding numerous possibilities to tailor their properties toward diverse functionalities. Herein, we review the progress in the field of semiconductor-metal hybrid nanoparticles (HNPs) focusing on metal-chalcogenides-metal combined systems. The fundamental principles of their synthesis are discussed, leading to a myriad of possible hybrid architectures including Janus zero-dimensional quantum dot-based systems and anisotropic quasi 1D nanorods and quasi-2D platelets. The properties of HNPs are described with particular focus on emergent synergetic characteristics. Of these, the light-induced charge-separation effect across the semiconductor-metal nanojunction is of particular interest as a basis for the utilization of HNPs in photocatalytic applications. The extensive studies on the charge-separation behavior and its dependence on the HNPs structural characteristics, environmental and chemical conditions, and light excitation regime are surveyed. Combining the advanced synthetic control with the charge-separation effect has led to demonstration of various applications of HNPs in different fields. A particular promise lies in their functionality as photocatalysts for a variety of uses, including solar-to-fuel conversion, as a new type of photoinitiator for photopolymerization and 3D printing, and in novel chemical and biomedical uses.
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Affiliation(s)
- Yuval Ben-Shahar
- Department of Physical Chemistry, Israel Institute for Biological Research, P.O. Box 19, Ness Ziona74100, Israel
| | - David Stone
- The Institute of Chemistry and Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem91904, Israel
| | - Uri Banin
- The Institute of Chemistry and Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem91904, Israel
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4
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Kumar Mandal R, Sayed Mondal A, Ghosh S, Halder A, Pal Majumder T. Synthesis, characterisation and optical studies of CdO-NiO NCs for comparative dye degradation study between two hazardous dyes Congo red and Rose bengal. RESULTS IN CHEMISTRY 2023. [DOI: 10.1016/j.rechem.2023.100810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
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5
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Assadullah I, Malik JH, Shafi A, Tomar R. Growth of crystalline WO 3-ZnSe nanocomposites: an approach to optical, electrochemical, and catalytic properties. Sci Rep 2022; 12:3962. [PMID: 35273263 PMCID: PMC8913615 DOI: 10.1038/s41598-022-07951-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 02/16/2022] [Indexed: 01/10/2023] Open
Abstract
In this study, novel growth of WO3-ZnSe nanocomposites was carried out by a simple, low-cost hydrothermal process under subcritical conditions and is reported for the first time in just 5 h. The products were characterized in detail by multiform techniques: X-ray diffraction, scanning electron microscopy (SEM), optical studies, and Fourier transform analysis. The influence of ZnSe on the structural, morphological, compositional, optical, and catalytic properties of WO3 is demonstrated. The WO3 metal oxide material is grown in a hexagonal crystal structure with wide-band-gap and has been modified by ZnSe to form a composite nanostructures in the nanoscale range. The electrochemical properties of the prepared materials were studied by cyclic voltammetry, which revealed that the synthesized material exhibited remarkable electrochemical supercapacitive activity. Moreover, the composite nanostructures showed excellent photocatalytic activity for degradation of phenol and almost 93% of phenol was degraded with good recyclability and stability. According to The International Commission on Illumination (CIE), the synthesized nanomaterial shows blue emission and is suitable for blue LEDs.
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Affiliation(s)
- Insaaf Assadullah
- School of Studies in Chemistry, Jiwaji University, Gwalior, 474011, India.
| | - Javied Hamid Malik
- School of Studies in Chemistry, Jiwaji University, Gwalior, 474011, India
| | - Adil Shafi
- Environmental Research Laboratory, Department of Chemistry, Aligarh Muslim University, Aligarh, Uttar Pradesh, 202002, India
| | - Radha Tomar
- School of Studies in Chemistry, Jiwaji University, Gwalior, 474011, India
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6
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Cohen T, Waiskopf N, Levi A, Stone D, Remennik S, Banin U. Flow synthesis of photocatalytic semiconductor-metal hybrid nanocrystals. NANOSCALE 2022; 14:1944-1953. [PMID: 35050298 DOI: 10.1039/d1nr07681g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Semiconductor-metal hybrid nanostructures are promising materials for photocatalytic applications, providing high efficiencies compared to their composing counterparts. So far, the synthesis of such hybrid nanoparticles was limited to batch reactors, achieving tunability while demonstrating how each of the nanocrystals' characteristics affects photocatalytic performances. Yet, new methodologies should be established to increase the synthetic yield while maintaining high control over the resulting structures. Herein, scalable advanced flow techniques are introduced, yielding ZnSe-metal hybrid nanoparticles either in a thermal growth or photo-induced growth regime. Firstly, thermal gold growth in the flow reactor is achieved with good control over the metal tip size and the nanoparticle morphology. We address the dependence of the reaction on temperature, the precursor to nanorod molar ratios, and additional parameters. Additionally, light-induced growth by the flow reactor is demonstrated for platinum clusters. The quality of the resulting hybrids is directly demonstrated by their functionality in photocatalytic hydrogen generation by water reduction, displaying enhanced activity compared to bare ZnSe nanorods. The fairly straightforward adaptation of such powerful flow-reaction techniques to scale-up photocatalytic hybrid nanoparticle syntheses takes them one step forwards towards the realization of their potential in real-life application scenarios.
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Affiliation(s)
- Tal Cohen
- The Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
- The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Nir Waiskopf
- The Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
- The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Adar Levi
- The Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
- The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - David Stone
- The Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
- The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Sergei Remennik
- The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Uri Banin
- The Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
- The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
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7
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Faisal M, Rashed MA, Alhmami M, Harraz FA. Clean light oriented ultrafast Pt/Bi2S3 nanoflakes for the photocatalytic destruction of gemifloxacin mesylate drug and methylene blue. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113288] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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Camargo FA, Ben-Shahar Y, Nagahara T, Panfil YE, Russo M, Banin U, Cerullo G. Visualizing Ultrafast Electron Transfer Processes in Semiconductor-Metal Hybrid Nanoparticles: Toward Excitonic-Plasmonic Light Harvesting. NANO LETTERS 2021; 21:1461-1468. [PMID: 33481610 PMCID: PMC7883410 DOI: 10.1021/acs.nanolett.0c04614] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Recently, it was demonstrated that charge separation in hybrid metal-semiconductor nanoparticles (HNPs) can be obtained following photoexcitation of either the semiconductor or of the localized surface plasmon resonance (LSPR) of the metal. This suggests the intriguing possibility of photocatalytic systems benefiting from both plasmon and exciton excitation, the main challenge being to outcompete other ultrafast relaxation processes. Here we study CdSe-Au HNPs using ultrafast spectroscopy with high temporal resolution. We describe the complete pathways of electron transfer for both semiconductor and LSPR excitation. In the former, we distinguish hot and band gap electron transfer processes in the first few hundred fs. Excitation of the LSPR reveals an ultrafast (<30 fs) electron transfer to CdSe, followed by back-transfer from the semiconductor to the metal within 210 fs. This study establishes the requirements for utilization of the combined excitonic-plasmonic contribution in HNPs for diverse photocatalytic applications.
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Affiliation(s)
- Franco
V. A. Camargo
- Dipartimento
di Fisica, IFN-CNR, Politecnico di Milano, Piazza Leonardo da Vinci 32, Milan 20133, Italy
| | - Yuval Ben-Shahar
- Institute
of Chemistry and Center for Nanoscience & Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
- Department
of Physical Chemistry, Israel Institute
for Biological Research, P.O. Box 19, Ness-Ziona 74100, Israel
| | - Tetsuhiko Nagahara
- Dipartimento
di Fisica, IFN-CNR, Politecnico di Milano, Piazza Leonardo da Vinci 32, Milan 20133, Italy
- Department
of Chemistry and Materials Technology, Kyoto
Institute of Technology, Matsugasaki, Kyoto 6068585, Japan
| | - Yossef E. Panfil
- Institute
of Chemistry and Center for Nanoscience & Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Mattia Russo
- Dipartimento
di Fisica, IFN-CNR, Politecnico di Milano, Piazza Leonardo da Vinci 32, Milan 20133, Italy
| | - Uri Banin
- Institute
of Chemistry and Center for Nanoscience & Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Giulio Cerullo
- Dipartimento
di Fisica, IFN-CNR, Politecnico di Milano, Piazza Leonardo da Vinci 32, Milan 20133, Italy
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9
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Pan X, Chen WJ, Cai H, Li H, Sun XJ, Weng B, Yi Z. A redox-active support for the synthesis of Au@SnO 2 core-shell nanostructure and SnO 2 quantum dots with efficient photoactivities. RSC Adv 2020; 10:33955-33961. [PMID: 35519050 PMCID: PMC9056741 DOI: 10.1039/d0ra06175a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 08/28/2020] [Indexed: 11/23/2022] Open
Abstract
A defect pyrochlore-type Sn1.06Nb2O5.59F0.97 (SnNbOF) nano-octahedron is used as a redox-active support for fabricating Au@SnO2 core-shell and SnO2 quantum dots at room temperature without the use of organic species or foreign reducing reagents. Gold (Au) and SnO2 components were obtained through an in situ redox reaction between the HAuCl4 and reductive Sn2+ ions incorporated in SnNbOF. The composition and morphology of the resulting nanocomposites (denoted as Au-SnNbOF) could be controlled by adjusting the Au/SnNbOF ratio. The Au-SnNbOF nanocomposites exhibited efficient photoactivities for methyl orange (MO) degradation under the visible light irradiation (λ > 420 nm), during which the MO was almost completely degraded within 8 min. Among all the samples, the 5wt% Au-SnNbOF nanocomposite had the highest rate constant (0.43 min-1), which was 40 times higher than that of the blank SnNbOF.
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Affiliation(s)
- Xiaoyang Pan
- College of Chemistry and Materials, Quanzhou Normal University Quanzhou 362000 China
| | - Wen-Jie Chen
- College of Chemistry and Materials, Quanzhou Normal University Quanzhou 362000 China
| | - Huizhen Cai
- College of Chemistry and Materials, Quanzhou Normal University Quanzhou 362000 China
| | - Hui Li
- College of Chemistry and Materials, Quanzhou Normal University Quanzhou 362000 China
| | - Xue Jiao Sun
- College of Chemistry and Materials, Quanzhou Normal University Quanzhou 362000 China
| | - Bo Weng
- cMACS, Department of Microbial and Molecular Systems, KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Zhiguo Yi
- State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences Shanghai 200050 China
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10
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Ding X, Li D, Jiang J. Gold-based Inorganic Nanohybrids for Nanomedicine Applications. Theranostics 2020; 10:8061-8079. [PMID: 32724458 PMCID: PMC7381751 DOI: 10.7150/thno.42284] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 06/18/2020] [Indexed: 02/07/2023] Open
Abstract
Noble metal Au nanoparticles have attracted extensive interests in the past decades, due to their size and morphology dependent localized surface plasmon resonances. Their unique optical property, high chemical stability, good biocompatibility, and easy functionalization make them promising candidates for a variety of biomedical applications, including bioimaging, biosensing, and cancer therapy. With the intention of enhancing their optical response in the near infrared window and endowing them with additional magnetic properties, Au nanoparticles have been integrated with other functional nanomaterials that possess complementary attributes, such as copper chalcogenides and magnetic metal oxides. The as constructed hybrid nanostructures are expected to exhibit unconventional properties compared to their separate building units, due to nanoscale interactions between materials with different physicochemical properties, thus broadening the application scope and enhancing the overall performance of the hybrid nanostructures. In this review, we summarize some recent progresses in the design and synthesis of noble metal Au-based hybrid inorganic nanostructures for nanomedicine applications, and the potential and challenges for their clinical translations.
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11
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PbS Quantum Dots Decorating TiO 2 Nanocrystals: Synthesis, Topology, and Optical Properties of the Colloidal Hybrid Architecture. Molecules 2020; 25:molecules25122939. [PMID: 32604749 PMCID: PMC7356616 DOI: 10.3390/molecules25122939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 06/24/2020] [Accepted: 06/24/2020] [Indexed: 11/17/2022] Open
Abstract
Fabrication of heterostructures by merging two or more materials in a single object. The domains at the nanoscale represent a viable strategy to purposely address materials’ properties for applications in several fields such as catalysis, biomedicine, and energy conversion. In this case, solution-phase seeded growth and the hot-injection method are ingeniously combined to fabricate TiO2/PbS heterostructures. The interest in such hybrid nanostructures arises from their absorption properties that make them advantageous candidates as solar cell materials for more efficient solar light harvesting and improved light conversion. Due to the strong lattice mismatch between TiO2 and PbS, the yield of the hybrid structure and the control over its properties are challenging. In this study, a systematic investigation of the heterostructure synthesis as a function of the experimental conditions (such as seeds’ surface chemistry, reaction temperature, and precursor concentration), its topology, structural properties, and optical properties are carried out. The morphological and chemical characterizations confirm the formation of small dots of PbS by decorating the oleylamine surface capped TiO2 nanocrystals under temperature control. Remarkably, structural characterization points out that the formation of heterostructures is accompanied by modification of the crystallinity of the TiO2 domain, which is mainly ascribed to lattice distortion. This result is also confirmed by photoluminescence spectroscopy, which shows intense emission in the visible range. This originated from self-trapped excitons, defects, and trap emissive states.
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12
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Nawrot KC, Wawrzyńczyk D, Bezkrovnyi O, Kępiński L, Cichy B, Samoć M, Nyk M. Functional CdS-Au Nanocomposite for Efficient Photocatalytic, Photosensitizing, and Two-Photon Applications. NANOMATERIALS 2020; 10:nano10040715. [PMID: 32290061 PMCID: PMC7221832 DOI: 10.3390/nano10040715] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 04/05/2020] [Accepted: 04/07/2020] [Indexed: 11/16/2022]
Abstract
We demonstrate a low-temperature synthesis of hydrophilic, penicillamine-stabilized hybrid CdS-Au nanoparticles (NPs) utilizing different Au concentrations. The obtained hybrid nanomaterials exhibit photoluminescence quenching and emission lifetime reduction in comparison with their raw semiconductor CdS NPs counterparts. An increase of concentration of Au present at the surface of CdS leads to lower photoluminescence intensity and faster emission decays, suggesting more efficient charge separation when larger Au domains are present. For photocatalysis studies, we performed methylene blue (MB) absorption measurements under irradiation in the presence of CdS-Au NPs. After 1 h of light exposure, we observed the absorbance decrease to about 35% and 10% of the initial value for the CdS-5Au and CdS-7.5Au (the hybrid NPs obtained in a presence of 5.0 and 7.5 mM Au), respectively, which indicates MB reduction caused by electrons effectively separated from holes on metal surface. In further similar photocatalysis experiments, we measured bovine serum albumin (BSA) integrated photoluminescence intensity quenching in the presence of CdS-Au NPs, with a 50% decrease being obtained for CdS-2.5Au NPs and CdS-5Au NPs, with a faster response rate detected for the system prepared with a higher Au concentration. The results suggest hole-driven reactive oxygen species (ROS) production, causing BSA degeneration. Finally, we performed two-photon excited emission (TPEE) measurements for CdS-5Au NPs, obtaining their two-photon absorption (TPA) cross-section values up to 15.8 × 103 GM (Goeppert-Mayer units). We conclude that the obtained water-soluble CdS-Au NPs exhibit potential triple functionalities as photocatalysts for reduction and oxidation reactions as well as materials for two-photon absorption applications, so that they may be considered as future theranostics.
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Affiliation(s)
- Katarzyna C. Nawrot
- Advanced Materials Engineering and Modelling Group, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland; (K.C.N.); (D.W.); (M.S.)
| | - Dominika Wawrzyńczyk
- Advanced Materials Engineering and Modelling Group, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland; (K.C.N.); (D.W.); (M.S.)
| | - Oleksii Bezkrovnyi
- W. Trzebiatowski Institute of Low Temperature and Structure Research Polish Academy of Sciences, Okólna 2, 50-422 Wroclaw, Poland; (O.B.); (L.K.); (B.C.)
| | - Leszek Kępiński
- W. Trzebiatowski Institute of Low Temperature and Structure Research Polish Academy of Sciences, Okólna 2, 50-422 Wroclaw, Poland; (O.B.); (L.K.); (B.C.)
| | - Bartłomiej Cichy
- W. Trzebiatowski Institute of Low Temperature and Structure Research Polish Academy of Sciences, Okólna 2, 50-422 Wroclaw, Poland; (O.B.); (L.K.); (B.C.)
| | - Marek Samoć
- Advanced Materials Engineering and Modelling Group, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland; (K.C.N.); (D.W.); (M.S.)
| | - Marcin Nyk
- Advanced Materials Engineering and Modelling Group, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland; (K.C.N.); (D.W.); (M.S.)
- Correspondence: ; Tel.: +48-71-320-2316
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13
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Controlled Synthesis of Au Nanocrystals-Metal Selenide Hybrid Nanostructures toward Plasmon-Enhanced Photoelectrochemical Energy Conversion. NANOMATERIALS 2020; 10:nano10030564. [PMID: 32245031 PMCID: PMC7153708 DOI: 10.3390/nano10030564] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 03/16/2020] [Accepted: 03/16/2020] [Indexed: 01/03/2023]
Abstract
A simple method for the controllable synthesis of Au nanocrystals–metal selenide hybrid nanostructures via amino acid guiding strategy is proposed. The results show that the symmetric overgrowth mode of PbSe shells on Au nanorods can be precisely manipulated by only adjusting the initial concentration of Pb2+. The shape of Au–PbSe hybrids can evolve from dumbbell-like to yolk-shell. Interestingly, the plasmonic absorption enhancement could be tuned by the symmetry of these hybrid nanostructures. This provides an effective pathway for maneuvering plasmon-induced energy transfer in metal–semiconductor hybrids. In addition, the photoactivities of Au–PbSe nanorods sensitized TiO2 electrodes have been further evaluated. Owing to the synergism between effective plasmonic enhancement effect and efficient interfacial charge transfer in these hybrid nanostructures, the Au–PbSe yolk-shell nanorods exhibit an outstanding photocurrent activity. Their photocurrent density is 4.38 times larger than that of Au–PbSe dumbbell-like nanorods under light irradiation at λ > 600 nm. As a versatile method, the proposed strategy can also be employed to synthesize other metal–selenide hybrid nanostructures (such as Au–CdSe, Au–Bi2Se3 and Au–CuSe).
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14
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Volokh M, Mokari T. Metal/semiconductor interfaces in nanoscale objects: synthesis, emerging properties and applications of hybrid nanostructures. NANOSCALE ADVANCES 2020; 2:930-961. [PMID: 36133041 PMCID: PMC9418511 DOI: 10.1039/c9na00729f] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 02/04/2020] [Indexed: 05/11/2023]
Abstract
Hybrid nanostructures, composed of multi-component crystals of various shapes, sizes and compositions are much sought-after functional materials. Pairing the ability to tune each material separately and controllably combine two (or more) domains with defined spatial orientation results in new properties. In this review, we discuss the various synthetic mechanisms for the formation of hybrid nanostructures of various complexities containing at least one metal/semiconductor interface, with a focus on colloidal chemistry. Different synthetic approaches, alongside the underlying kinetic and thermodynamic principles are discussed, and future advancement prospects are evaluated. Furthermore, the proved unique properties are reviewed with emphasis on the connection between the synthetic method and the resulting physical, chemical and optical properties with applications in fields such as photocatalysis.
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Affiliation(s)
- Michael Volokh
- Department of Chemistry, Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev Beer-Sheva 8410501 Israel
| | - Taleb Mokari
- Department of Chemistry, Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev Beer-Sheva 8410501 Israel
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15
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Zhang B, Wei C. The sensitive detection of ATP and ADA based on turn-on fluorescent copper/silver nanoclusters. Anal Bioanal Chem 2020; 412:2529-2536. [PMID: 32043202 DOI: 10.1007/s00216-020-02476-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 01/27/2020] [Accepted: 01/31/2020] [Indexed: 11/25/2022]
Abstract
A simple turn-on fluorescence strategy is proposed for the detection of ATP based on DNA-stabilized copper/silver nanoclusters (DNA-Cu/Ag NCs). The fluorescence intensity of DNA-Cu/Ag NCs increases significantly in the presence of ATP, because the specific interaction between ATP and its aptamer causes two darkish Cu/Ag NCs to be situated at the 5' and 3' termini close to each other. A limit of detection (LOD) of 7.0 μM is found, in a linear range of 2-18 mM, and the proposed sensor is simple, sensitive, and selective. Additionally, the DNA-Cu/Ag NCs/ATP system is further developed into a sensor for ADA detection and demonstrates a linear response to ADA from 5 to 50 U/L with a LOD of 5 U/L. The proposed method is also shown to be successful in detecting ATP and ADA in a solution of fetal bovine serum.
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Affiliation(s)
- Baozhu Zhang
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Molecular Science, Shanxi University, Taiyuan, 030006, Shanxi, China
- College of Chemistry and Chemical Engineering, Jinzhong University, Yuci, 030619, Shanxi, China
| | - Chunying Wei
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Molecular Science, Shanxi University, Taiyuan, 030006, Shanxi, China.
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16
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Zhang B, Wei C. An aptasensor for the label-free detection of thrombin based on turn-on fluorescent DNA-templated Cu/Ag nanoclusters. RSC Adv 2020; 10:35374-35380. [PMID: 35515676 PMCID: PMC9056932 DOI: 10.1039/d0ra04609d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 09/09/2020] [Indexed: 11/21/2022] Open
Abstract
A highly sensitive thrombin aptasensor was constructed based on the alteration of the aptamer conformation induced by the target recognition and the turn-on fluorescence due to the proximity of two darkish DNA-templated copper/silver nanoclusters (DNA-Cu/Ag NCs). Two DNA templates were designed as the functional structures consisting of the Cu/Ag NC-nucleation segment located at two termini or one terminus and the aptamer segment in the middle of a DNA template. Two darkish DNA-Cu/Ag NCs came close to each other when the aptamer combined with the target due to the conformational alteration of the aptamer structure, resulting in an increased fluorescence signal readout. Thrombin was sensitively determined as low as 1.6 nM in the range of 1.6–8.0 nM with a high selectivity. Finally, this sensor succeeded in detecting thrombin in a real fetal bovine serum. A highly sensitive thrombin aptasensor was constructed based on the alteration of the aptamer conformation induced by the target recognition and the turn-on fluorescence due to the proximity of two darkish DNA-templated copper/silver nanoclusters (DNA-Cu/Ag NCs).![]()
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Affiliation(s)
- Baozhu Zhang
- College of Chemistry and Chemical Engineering
- Jinzhong University
- P. R. China
| | - Chunying Wei
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education
- Institute of Molecular Science
- Shanxi University
- Taiyuan 030006
- P. R. China
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17
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Liu X, Kongsuwan N, Li X, Zhao D, Wu Z, Hess O, Zhang X. Tailoring the Third-Order Nonlinear Optical Property of a Hybrid Semiconductor Quantum Dot-Metal Nanoparticle: From Saturable to Fano-Enhanced Absorption. J Phys Chem Lett 2019; 10:7594-7602. [PMID: 31769991 DOI: 10.1021/acs.jpclett.9b02627] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Semiconductor-metal hybrid nanostructures present an exotic class of nonlinear optical materials due to their potential optoelectronic applications. However, most studies to date focus on their total optical responses instead of contributions from individual nonlinear orders. In this Letter, we present a theoretical study on the third-order nonlinear optical absorption of a hybrid colloidal semiconductor quantum dot (SQD)-metal nanoparticle (MNP) system. We develop a novel analytic treatment based on the nonlinear density matrix equation and derive a closed-form expression for the optical susceptibility. Our study identifies the parameter space that governs the system's optical transition from being a saturable absorber to a Fano-enhanced absorber. We attribute this transition to the plasmon-mediated self-interaction of the SQD. The findings provide a valuable guideline for optimized designs of functional nanophotonic devices based on SQD-MNP hybrid structures.
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Affiliation(s)
- Xiaona Liu
- School of Physical Science and Technology , Southwest University , Chongqing 400715 , P. R. China
- State Key Laboratory of Superlattices and Microstructures , Institute of Semiconductors, Chinese Academy of Sciences , Beijing 100083 , P. R. China
- The Blackett Laboratory , Imperial College London , Prince Consort Road , London SW7 2AZ , United Kingdom
| | - Nuttawut Kongsuwan
- The Blackett Laboratory , Imperial College London , Prince Consort Road , London SW7 2AZ , United Kingdom
| | - Xiaoguang Li
- Institute for Advanced Study , Shenzhen University , Shenzhen 518060 , P. R. China
| | - Dongxing Zhao
- School of Physical Science and Technology , Southwest University , Chongqing 400715 , P. R. China
| | - Zhengmao Wu
- School of Physical Science and Technology , Southwest University , Chongqing 400715 , P. R. China
| | - Ortwin Hess
- The Blackett Laboratory , Imperial College London , Prince Consort Road , London SW7 2AZ , United Kingdom
| | - Xinhui Zhang
- State Key Laboratory of Superlattices and Microstructures , Institute of Semiconductors, Chinese Academy of Sciences , Beijing 100083 , P. R. China
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18
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Rodríguez Ortiz FA, Roman BJ, Wen JR, Mireles Villegas N, Dacres DF, Sheldon MT. The role of gold oxidation state in the synthesis of Au-CsPbX 3 heterostructure or lead-free Cs 2Au IAu IIIX 6 perovskite nanoparticles. NANOSCALE 2019; 11:18109-18115. [PMID: 31576885 DOI: 10.1039/c9nr07222e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Here, we report that the oxidation state of gold plays a dominant role in determining the reaction products when gold halide salts are mixed with all-inorganic lead halide perovskite nanocrystals. When CsPbX3 nanocrystals react with Au(i) halide salts, Au nanoparticles are deposited on the surface of the perovskites through the reduction of Au1+ ions by the surfactant ligand shell, to produce Au-CsPbX3 heterostructures. These heterostructures preserve comparably high photoluminescence quantum yield (PLQY) and show identical XRD diffractograms as the parent CsPbX3 nanocrystals. In contrast, the reaction of CsPbX3 nanocrystals with Au(iii) halide salts promotes complete cation exchange of Pb ions by Au ions in the nanocrystal perovskite lattice. The cation exchange products, Cs2AuIAuIIIBr6 or Cs2AuIAuIIICl6, show XRD patterns corresponding to a tetragonal mixed halide perovskite crystal structure and show no visible photoluminescence. This crucial dependence on the oxidation state of the Au ion informs synthetic strategies for producing and optimizing metal-perovskite heterostructures and lead-free perovskite nanoparticles.
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Affiliation(s)
| | - Benjamin J Roman
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA
| | - Je-Ruei Wen
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA
| | | | - David F Dacres
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA
| | - Matthew T Sheldon
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA and Department of Material Science and Engineering, Texas A&M University, College Station, Texas 77843, USA.
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19
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Hu Z, Mi Y, Ji Y, Wang R, Zhou W, Qiu X, Liu X, Fang Z, Wu X. Multiplasmon modes for enhancing the photocatalytic activity of Au/Ag/Cu 2O core-shell nanorods. NANOSCALE 2019; 11:16445-16454. [PMID: 31441922 DOI: 10.1039/c9nr03943k] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
One of the critical challenges for semiconductor photocatalysis is the high efficiency utilization of solar energy. For plasmonic metal-semiconductor photocatalysts, the photocatalytic activity over an extended wavelength range for a photoresponsive semiconductor could be significantly improved either via the direct electron transfer (DET) or via the plasmon-induced resonant energy transfer (PIRET). Still, the narrow spectral overlap of plasmon and the semiconductor band edge is a key factor in restricting the development of PIRET. Herein, we have introduced a simple and versatile strategy to realize a broad spectral overlap by creating multipolar plasmon resonances near the semiconductor band edge. Cu2O coated Au/Ag nanorods (NRs) were prepared using a facile wet chemistry method. Transverse plasmon modes of Au/Ag/Cu2O NRs can split into dipole and octupole plasmon modes. The core aspect ratio and shell thickness could be used to regulate these two modes for extending the spectral overlap of plasmon resonance and the Cu2O band edge. Au/Ag/Cu2O NRs were found to display enhanced visible light photocatalytic activity compared to spherical Au/Ag/Cu2O nanoparticles. The enhancement mechanism was ascribed to both dipole and octupole plasmon modes boosting electron-hole separation in Cu2O via PIRET as confirmed by transient absorption measurements.
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Affiliation(s)
- Zhijian Hu
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China. and University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yang Mi
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China. and University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yinglu Ji
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China. and University of Chinese Academy of Sciences, Beijing 100049, China
| | - Rui Wang
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China. and University of Chinese Academy of Sciences, Beijing 100049, China
| | - Weiya Zhou
- Institute of Physics, Chinese Academy of Science, Beijing 100190, China
| | - Xiaohui Qiu
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China. and University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xinfeng Liu
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China. and University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zheyu Fang
- Institute of Physics, Peking University, Beijing 100190, China
| | - Xiaochun Wu
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China. and University of Chinese Academy of Sciences, Beijing 100049, China
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20
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Su H, Hurd Price CA, Jing L, Tian Q, Liu J, Qian K. Janus particles: design, preparation, and biomedical applications. Mater Today Bio 2019; 4:100033. [PMID: 32159157 PMCID: PMC7061647 DOI: 10.1016/j.mtbio.2019.100033] [Citation(s) in RCA: 121] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 09/30/2019] [Accepted: 10/11/2019] [Indexed: 02/07/2023] Open
Abstract
Janus particles with an anisotropic structure have emerged as a focus of intensive research due to their diverse composition and surface chemistry, which show excellent performance in various fields, especially in biomedical applications. In this review, we briefly introduce the structures, composition, and properties of Janus particles, followed by a summary of their biomedical applications. Then we review several design strategies including morphology, particle size, composition, and surface modification, that will affect the performance of Janus particles. Subsequently, we explore the synthetic methodologies of Janus particles, with an emphasis on the most prevalent synthetic method (surface nucleation and seeded growth). Following this, we highlight Janus particles in biomedical applications, especially in drug delivery, bio-imaging, and bio-sensing. Finally, we will consider the current challenges the materials face with perspectives in the future directions.
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Affiliation(s)
- H. Su
- School of Biomedical Engineering, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, China
| | - C.-A. Hurd Price
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- DICP-Surrey Joint Centre for Future Materials, Department of Chemical and Process Engineering, University of Surrey Guildford, Surrey, GU2 7XH, United Kingdom
| | - L. Jing
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Q. Tian
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - J. Liu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- DICP-Surrey Joint Centre for Future Materials, Department of Chemical and Process Engineering, University of Surrey Guildford, Surrey, GU2 7XH, United Kingdom
| | - K. Qian
- School of Biomedical Engineering, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, China
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21
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Tang SY, Medina H, Yen YT, Chen CW, Yang TY, Wei KH, Chueh YL. Enhanced Photocarrier Generation with Selectable Wavelengths by M-Decorated-CuInS 2 Nanocrystals (M = Au and Pt) Synthesized in a Single Surfactant Process on MoS 2 Bilayers. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1803529. [PMID: 30663255 DOI: 10.1002/smll.201803529] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 11/13/2018] [Indexed: 05/10/2023]
Abstract
A facile approach for the synthesis of Au- and Pt-decorated CuInS2 nanocrystals (CIS NCs) as sensitizer materials on the top of MoS2 bilayers is demonstrated. A single surfactant (oleylamine) is used to prepare such heterostructured noble metal decorated CIS NCs from the pristine CIS. Such a feasible way to synthesize heterostructured noble metal decorated CIS NCs from the single surfactant can stimulate the development of the functionalized heterostructured NCs in large scale for practical applications such as solar cells and photodetectors. Photodetectors based on MoS2 bilayers with the synthesized nanocrystals display enhanced photocurrent, almost 20-40 times higher responsivity and the On/Off ratio is enlarged one order of magnitude compared with the pristine MoS2 bilayers-based photodetectors. Remarkably, by using Pt- or Au-decorated CIS NCs, the photocurrent enhancement of MoS2 photodetectors can be tuned between blue (405 nm) to green (532 nm). The strategy described here acts as a perspective to significantly improve the performance of MoS2 -based photodetectors with the controllable absorption wavelengths in the visible light range, showing the feasibility of the possible color detection.
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Affiliation(s)
- Shin-Yi Tang
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan, ROC
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 30013, Taiwan, ROC
| | - Henry Medina
- Department of Electronic Materials, Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), Singapore, 138634, Singapore
| | - Yu-Ting Yen
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan, ROC
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 30013, Taiwan, ROC
| | - Chia-Wei Chen
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan, ROC
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 30013, Taiwan, ROC
| | - Tzu-Yi Yang
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan, ROC
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 30013, Taiwan, ROC
| | - Kung-Hwa Wei
- Department of Materials Science and Engineering, National Chiao Tung University, 30010, Hsinchu, Taiwan, ROC
- Center for Emergent Functional Matter Science, National Chiao Tung University, 30010, Hsinchu, Taiwan, ROC
| | - Yu-Lun Chueh
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan, ROC
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 30013, Taiwan, ROC
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22
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Liang ZP, Hou DF, Jiao ZF, Guo XN, Tong XL, Guo XY. Aldehydes rather than alcohols in oxygenated products from light-driven Fischer–Tropsch synthesis over Ru/SiC catalysts. Catal Sci Technol 2019. [DOI: 10.1039/c9cy00990f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The oxygenated products in light-driven Fischer–Tropsch synthesis over Ru/SiC catalysts are aldehydes rather than alcohols.
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Affiliation(s)
- Zai-Peng Liang
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry, Chinese Academy of Sciences
- Taiyuan 030001
- China
- Center of Materials Science and Optoelectronics Engineering
| | - Dong-Fang Hou
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry, Chinese Academy of Sciences
- Taiyuan 030001
- China
- Center of Materials Science and Optoelectronics Engineering
| | - Zhi-Feng Jiao
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry, Chinese Academy of Sciences
- Taiyuan 030001
- China
- Center of Materials Science and Optoelectronics Engineering
| | - Xiao-Ning Guo
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry, Chinese Academy of Sciences
- Taiyuan 030001
- China
| | - Xi-Li Tong
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry, Chinese Academy of Sciences
- Taiyuan 030001
- China
| | - Xiang-Yun Guo
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry, Chinese Academy of Sciences
- Taiyuan 030001
- China
- Center of Materials Science and Optoelectronics Engineering
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23
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Shahsavari R, Hwang SH. Size- and Shape-Controlled Synthesis of Calcium Silicate Particles Enables Self-Assembly and Enhanced Mechanical and Durability Properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:12154-12166. [PMID: 30252480 DOI: 10.1021/acs.langmuir.8b00917] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Calcium silicate (CS)-based materials are ubiquitous in diverse industries ranging from cementitious materials to bone tissue engineering and drug delivery. As a symbolic example, concrete is the most widely used synthetic material on the planet. This large consumption entails significant negative environmental footprint, which calls for innovative strategies to develop greener concrete with improved properties (to do more with less). Herein, we focus on the physicochemical properties of novel spherical calcium silicate particles with an extremely narrow size distribution and report their promising potential as fundamental building blocks. We demonstrate a scalable size- and shape-controlled synthesis protocol to yield highly spherical CS submicron particles, leading to favorable aggregation mechanisms and thus self-assembly of the bulk ensemble. This optimized kinetics-controlled synthesis is governed by suitable stoichiometric ratio of calcium over silicon, type and concentration of the surfactant, and molar ratio of the alkaline solution. Our extensive nano/micro/macro-characterization results show that the bulk ensemble exhibits many superior properties, such as improved strength, toughness, ductility, and durability, paving the path for bottom-up science-based engineering of concrete.
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Affiliation(s)
- Rouzbeh Shahsavari
- C-Crete Technologies LLC , 13000 Murphy Road, Suite 102 , Houston , Texas 77477 , United States
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24
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Waiskopf N, Ben-Shahar Y, Banin U. Photocatalytic Hybrid Semiconductor-Metal Nanoparticles; from Synergistic Properties to Emerging Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1706697. [PMID: 29656489 DOI: 10.1002/adma.201706697] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 01/09/2018] [Indexed: 05/07/2023]
Abstract
Hybrid semiconductor-metal nanoparticles (HNPs) manifest unique combined and often synergetic properties stemming from the materials combination. These structures exhibit spatial charge separation across the semiconductor-metal junction upon light absorption, enabling their use as photocatalysts. So far, the main impetus of photocatalysis research in HNPs addresses their functionality in solar fuel generation. Recently, it was discovered that HNPs are functional in efficient photocatalytic generation of reactive oxygen species (ROS). This has opened the path for their implementation in diverse biomedical and industrial applications where high spatially temporally resolved ROS formation is essential. Here, the latest studies on the synergistic characteristics of HNPs are summarized, including their optical, electrical, and chemical properties and their photocatalytic function in the field of solar fuel generation is briefly discussed. Recent studies are then focused concerning photocatalytic ROS formation with HNPs under aerobic conditions. The emergent applications of this capacity are then highlighted, including light-induced modulation of enzymatic activity, photodynamic therapy, antifouling, wound healing, and as novel photoinitiators for 3D-printing. The superb photophysical and photocatalytic properties of HNPs offer already clear advantages for their utility in scenarios requiring on-demand light-induced radical formation and the full potential of HNPs in this context is yet to be revealed.
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Affiliation(s)
- Nir Waiskopf
- The Institute of Chemistry and Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - Yuval Ben-Shahar
- The Institute of Chemistry and Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - Uri Banin
- The Institute of Chemistry and Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
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25
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Afsheen S, Munir M, Isa Khan M, Iqbal T, Abrar M, Tahir MB, Rehman JU, Riaz KN, Ijaz M, Nabi G. Efficient biosensing through 1D silver nanostructured devices using plasmonic effect. NANOTECHNOLOGY 2018; 29:385501. [PMID: 29933247 DOI: 10.1088/1361-6528/aace9a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The current work explores the excitation of surface plasmon polaritons (SPPs) on a one dimensional (1D) silver nano-grating device, simulated on glass substrate, which can sense a very small change in the refractive index of an analyte adjacent to it. The most recent modeling technique finite element analysis is applied in this work by using a COMSOL RF module. The models of 1D grating devices of different slit widths with fixed periodicity and film thickness are simulated. The data is collected and then used to study higher refractive index unit per nanometer (RIU/nm) as well as the effect of the widths of the slits on the RIU. A number of investigations are done by the simulated data, like a dip in the transmission spectra of p-polarized light. This dip is due to SPP resonance with the variation of slit width. Furthermore, the most fascinating part of the research is the COMSOL modeling that provides an opportunity to look into factors affecting higher RIU/nm, while visualizing the cross-sectional view of the grating device and strong electric field enhancement at the surface of the metallic device. When the slit width is almost equal to half of the periodicity of the grating device, SPP resonance increases and it is at maximum for the slit width equal to two-thirds of the periodicity, because the coupling efficiency is at maximum.
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Affiliation(s)
- Sumera Afsheen
- Department of Zoology, Faculty of Science, University of Gujrat, Hafiz Hayat Campus, Gujrat, 50700, Pakistan
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26
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Ben-Shahar Y, Philbin JP, Scotognella F, Ganzer L, Cerullo G, Rabani E, Banin U. Charge Carrier Dynamics in Photocatalytic Hybrid Semiconductor-Metal Nanorods: Crossover from Auger Recombination to Charge Transfer. NANO LETTERS 2018; 18:5211-5216. [PMID: 29985622 DOI: 10.1021/acs.nanolett.8b02169] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Hybrid semiconductor-metal nanoparticles (HNPs) manifest unique, synergistic electronic and optical properties as a result of combining semiconductor and metal physics via a controlled interface. These structures can exhibit spatial charge separation across the semiconductor-metal junction upon light absorption, enabling their use as photocatalysts. The combination of the photocatalytic activity of the metal domain with the ability to generate and accommodate multiple excitons in the semiconducting domain can lead to improved photocatalytic performance because injecting multiple charge carriers into the active catalytic sites can increase the quantum yield. Herein, we show a significant metal domain size dependence of the charge carrier dynamics as well as the photocatalytic hydrogen generation efficiencies under nonlinear excitation conditions. An understanding of this size dependence allows one to control the charge carrier dynamics following the absorption of light. Using a model hybrid semiconductor-metal CdS-Au nanorod system and combining transient absorption and hydrogen evolution kinetics, we reveal faster and more efficient charge separation and transfer under multiexciton excitation conditions for large metal domains compared to small ones. Theoretical modeling uncovers a competition between the kinetics of Auger recombination and charge separation. A crossover in the dominant process from Auger recombination to charge separation as the metal domain size increases allows for effective multiexciton dissociation and harvesting in large metal domain HNPs. This was also found to lead to relative improvement of their photocatalytic activity under nonlinear excitation conditions.
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Affiliation(s)
- Yuval Ben-Shahar
- The Institute of Chemistry and Center for Nanoscience and Nanotechnology , The Hebrew University of Jerusalem , Jerusalem 91904 , Israel
| | - John P Philbin
- Department of Chemistry , University of California and Lawrence Berkeley National Laboratory , Berkeley , California 94720-1460 , United States
| | | | - Lucia Ganzer
- IFN-CNR, Dipartimento di Fisica , Politecnico di Milano , Milan 20133 , Italy
| | - Giulio Cerullo
- IFN-CNR, Dipartimento di Fisica , Politecnico di Milano , Milan 20133 , Italy
| | - Eran Rabani
- Department of Chemistry , University of California and Lawrence Berkeley National Laboratory , Berkeley , California 94720-1460 , United States
- The Sackler Institute for Computational Molecular and Materials Science , Tel Aviv University , Tel Aviv , Israel 69978
| | - Uri Banin
- The Institute of Chemistry and Center for Nanoscience and Nanotechnology , The Hebrew University of Jerusalem , Jerusalem 91904 , Israel
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27
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Wu Q, Si M, Zhang B, Zhang K, Li H, Mi L, Jiang Y, Rong Y, Chen J, Fang Y. Strong damping of the localized surface plasmon resonance of Ag nanoparticles by Ag 2O. NANOTECHNOLOGY 2018; 29:295702. [PMID: 29697064 DOI: 10.1088/1361-6528/aac031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
By studying oxidation of AgNPs (Ag nanoparticles) and decomposition of the produced silver oxide, we demonstrate that the localized surface plasmon resonance (LSPR) of AgNPs was damped by Ag2O produced during oxygen plasma irradiation (OPI). The AgNPs were fabricated by evaporation of high pure silver under high vacuum. The oxidation was conducted in oxygen plasma generated by radio frequency glow discharging in vacuum, and the decomposition was performed by annealing the silver oxide in nitrogen ambient at temperatures ranging from room temperature to 450 °C. Samples were characterized by color, absorption spectra, surface enhanced Raman scattering, x-ray photoelectron spectroscopy, and field emission scanning electron microscopy. The bandgap of the silver oxide was calculated. We propose that AgNPs are only partially oxidized into silver oxide during OPI, and the LSPR of the AgNPs left without being oxidation is strongly damped by the produced silver oxide. This LSPR damping is responsible for the transparency of the sample after OPI for 2 s.
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Affiliation(s)
- Qingmen Wu
- Department of Vacuum Science and Technology, Hefei University of Technology, Hefei, 230009, People's Republic of China
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28
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Fernando JFS, Shortell MP, Firestein KL, Zhang C, Larionov KV, Popov ZI, Sorokin PB, Bourgeois L, Waclawik ER, Golberg DV. Photocatalysis with Pt-Au-ZnO and Au-ZnO Hybrids: Effect of Charge Accumulation and Discharge Properties of Metal Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:7334-7345. [PMID: 29809011 DOI: 10.1021/acs.langmuir.8b00401] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Metal-semiconductor hybrid nanomaterials are becoming increasingly popular for photocatalytic degradation of organic pollutants. Herein, a seed-assisted photodeposition approach is put forward for the site-specific growth of Pt on Au-ZnO particles (Pt-Au-ZnO). A similar approach was also utilized to enlarge the Au nanoparticles at epitaxial Au-ZnO particles (Au@Au-ZnO). An epitaxial connection at the Au-ZnO interface was found to be critical for the site-specific deposition of Pt or Au. Light on-off photocatalysis tests, utilizing a thiazine dye (toluidine blue) as a model organic compound, were conducted and confirmed the superior photodegradation properties of Pt-Au-ZnO hybrids compared to Au-ZnO. In contrast, Au-ZnO type hybrids were more effective toward photoreduction of toluidine blue to leuco-toluidine blue. It was deemed that photoexcited electrons of Au-ZnO (Au, ∼5 nm) possessed high reducing power owing to electron accumulation and negative shift in Fermi level/redox potential; however, exciton recombination due to possible Fermi-level equilibration slowed down the complete degradation of toluidine blue. In the case of Au@Au-ZnO (Au, ∼15 nm), the photodegradation efficiency was enhanced and the photoreduction rate reduced compared to Au-ZnO. Pt-Au-ZnO hybrids showed better photodegradation and mineralization properties compared to both Au-ZnO and Au@Au-ZnO owing to a fast electron discharge (i.e. better electron-hole seperation). However, photoexcited electrons lacked the reducing power for the photoreduction of toluidine blue. The ultimate photodegradation efficiencies of Pt-Au-ZnO, Au@Au-ZnO, and Au-ZnO were 84, 66, and 39%, respectively. In the interest of effective metal-semiconductor type photocatalysts, the present study points out the importance of choosing the right metal, depending on whether a photoreduction and/or photodegradation process is desired.
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Affiliation(s)
- Joseph F S Fernando
- School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty , Queensland University of Technology (QUT) , Brisbane , Queensland 4000 , Australia
| | - Matthew P Shortell
- School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty , Queensland University of Technology (QUT) , Brisbane , Queensland 4000 , Australia
| | - Konstantin L Firestein
- School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty , Queensland University of Technology (QUT) , Brisbane , Queensland 4000 , Australia
| | - Chao Zhang
- School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty , Queensland University of Technology (QUT) , Brisbane , Queensland 4000 , Australia
| | - Konstantin V Larionov
- Inorganic Nanomaterials Laboratory , National University of Science and Technology MISIS , Leninsky prospect 4 , Moscow 119049 , Russian Federation
| | - Zakhar I Popov
- Inorganic Nanomaterials Laboratory , National University of Science and Technology MISIS , Leninsky prospect 4 , Moscow 119049 , Russian Federation
| | - Pavel B Sorokin
- Inorganic Nanomaterials Laboratory , National University of Science and Technology MISIS , Leninsky prospect 4 , Moscow 119049 , Russian Federation
| | - Laure Bourgeois
- Monash Centre for Electron Microscopy, Department of Materials Science and Engineering , Monash University , Melbourne , Victoria 3800 , Australia
| | - Eric R Waclawik
- School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty , Queensland University of Technology (QUT) , Brisbane , Queensland 4000 , Australia
| | - Dmitri V Golberg
- School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty , Queensland University of Technology (QUT) , Brisbane , Queensland 4000 , Australia
- International Center for Materials Nanoarchitectonics (MANA) , National Institute for Materials Science (NIMS) , Namiki 1-1 , Tsukuba , Ibaraki 3050044 , Japan
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29
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Bhaskar SP, Karthika MS, Jagirdar BR. Au/CdS Nanocomposite through Digestive Ripening of Au and CdS Nanoparticles and Its Photocatalytic Activity. ChemistrySelect 2018. [DOI: 10.1002/slct.201801157] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Srilakshmi P. Bhaskar
- Department of Inorganic & Physical ChemistryIndian Institute of Science Bangalore 560012 India
- Department of ChemistrySree Kerala Varma College Thrissur 680011 India
| | - Minikumari S. Karthika
- Department of Inorganic & Physical ChemistryIndian Institute of Science Bangalore 560012 India
| | - Balaji R. Jagirdar
- Department of Inorganic & Physical ChemistryIndian Institute of Science Bangalore 560012 India
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30
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Liu W, Zhang J, Peng Z, Yang X, Li L, Chen Q, Liu J, Wang K. Controlled formation of Ag2S/Ag Janus nanoparticles using alkylamine as reductant surfactants. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.02.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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31
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Cui J, Jiang R, Guo C, Bai X, Xu S, Wang L. Fluorine Grafted Cu7S4–Au Heterodimers for Multimodal Imaging Guided Photothermal Therapy with High Penetration Depth. J Am Chem Soc 2018; 140:5890-5894. [DOI: 10.1021/jacs.8b00368] [Citation(s) in RCA: 103] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Jiabin Cui
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Rui Jiang
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Chang Guo
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xilin Bai
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Suying Xu
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Leyu Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
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32
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Bazant P, Sedlacek T, Kuritka I, Podlipny D, Holcapkova P. Synthesis and Effect of Hierarchically Structured Ag-ZnO Hybrid on the Surface Antibacterial Activity of a Propylene-Based Elastomer Blends. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E363. [PMID: 29494511 PMCID: PMC5872942 DOI: 10.3390/ma11030363] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 02/26/2018] [Accepted: 02/26/2018] [Indexed: 11/24/2022]
Abstract
In this study, a hybrid Ag-ZnO nanostructured micro-filler was synthesized by the drop technique for used in plastic and medical industry. Furthermore, new antibacterial polymer nanocomposites comprising particles of Ag-ZnO up to 5 wt % and a blend of a thermoplastic polyolefin elastomer (TPO) with polypropylene were prepared using twin screw micro-compounder. The morphology and crystalline-phase structure of the hybrid Ag-ZnO nanostructured microparticles obtained was characterized by scanning electron microscopy and powder X-ray diffractometry. The specific surface area of this filler was investigated by means of nitrogen sorption via the Brunauer-Emmet-Teller method. A scanning electron microscope was used to conduct a morphological study of the polymer nanocomposites. Mechanical and electrical testing showed no adverse effects on the function of the polymer nanocomposites either due to the filler utilized or the given processing conditions, in comparison with the neat polymer matrix. The surface antibacterial activity of the compounded polymer nanocomposites was assessed against Escherichia coli ATCC 8739 and Staphylococcus aureus ATCC 6538P, according to ISO 22196:2007 (E). All the materials at virtually every filler-loading level were seen to be efficient against both species of bacteria.
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Affiliation(s)
- Pavel Bazant
- Centre of Polymer Systems, Tomas Bata University in Zlin, Trida Tomase Bati 5678, 760 01 Zlin, Czech Republic.
| | - Tomas Sedlacek
- Centre of Polymer Systems, Tomas Bata University in Zlin, Trida Tomase Bati 5678, 760 01 Zlin, Czech Republic.
| | - Ivo Kuritka
- Centre of Polymer Systems, Tomas Bata University in Zlin, Trida Tomase Bati 5678, 760 01 Zlin, Czech Republic.
| | - David Podlipny
- Centre of Polymer Systems, Tomas Bata University in Zlin, Trida Tomase Bati 5678, 760 01 Zlin, Czech Republic.
| | - Pavlina Holcapkova
- Centre of Polymer Systems, Tomas Bata University in Zlin, Trida Tomase Bati 5678, 760 01 Zlin, Czech Republic.
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33
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Zhang B, Wei C. Highly sensitive and selective detection of Pb 2+ using a turn-on fluorescent aptamer DNA silver nanoclusters sensor. Talanta 2018; 182:125-130. [PMID: 29501131 DOI: 10.1016/j.talanta.2018.01.061] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 12/21/2017] [Accepted: 01/27/2018] [Indexed: 11/25/2022]
Abstract
A novel turn-on fluorescent biosensor has been constructed using C-PS2.M-DNA-templated silver nanoclusters (Ag NCs) with an average diameter of about 1 nm. The proposed approach presents a low-toxic, simple, sensitive, and selective detection for Pb2+. The fluorescence intensity of C-PS2.M-DNA-Ag NCs enhances significantly in the presence of Pb2+, which is attributed to the special interaction between Pb2+ and its aptamer DNA PS2.M. Pb2+ induces the aptamer to form G-quadruplex and makes two darkish DNA/Ag NCs located at the 3' and 5' terminus close, resulting in the fluorescence light-up. Moreover, Pb2+ can be detected as low as 3.0 nM within a good linear range from 5 to 50 nM (R = 0.9862). Furthermore, the application for detection of Pb2+ in real water samples further demonstrates the reliability of the sensor. Thus, this sensor system shows a potential application for monitoring Pb2+ in environmental samples.
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Affiliation(s)
- Baozhu Zhang
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Molecular Science, Shanxi University, Taiyuan 030006, PR China; College of Chemistry and Chemical Engineering, Jinzhong University, Yuci 030619, PR China
| | - Chunying Wei
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Molecular Science, Shanxi University, Taiyuan 030006, PR China.
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34
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Khalavka Y, Harms S, Henkel A, Strozyk M, Ahijado-Guzmán R, Sönnichsen C. Synthesis of Au-CdS@CdSe Hybrid Nanoparticles with a Highly Reactive Gold Domain. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:187-190. [PMID: 29227688 DOI: 10.1021/acs.langmuir.7b02756] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We propose a novel route to synthesize semiconductor-gold hybrid nanoparticles directly in water, resulting in much larger gold domains than previous protocols (up to 50 nm) with very reactive surfaces which allow further functionalization. This method advances the possibility of self-assembly into complex structures with catalytic activity toward the reduction of nitro compounds by hydrides. The large size of these gold domains in hybrid particles supports efficient light scattering at the plasmon resonance frequency, making such structures attractive for single-particle studies.
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Affiliation(s)
- Yuriy Khalavka
- Institute of Physical Chemistry, University of Mainz , Duesbergweg 10-14, 55128 Mainz, Germany
- Yuriy Fedkovych Chernivtsi National University , Kotsiubynsky St. 2, 58012 Chernivtsi, Ukraine
- Graduate School of Materials Science in Mainz , Staudingerweg 9, D-55128 Mainz, Germany
| | - Sebastian Harms
- Institute of Physical Chemistry, University of Mainz , Duesbergweg 10-14, 55128 Mainz, Germany
| | - Andreas Henkel
- Data Center, University of Mainz , Anselm-Franz-von-Bentzel-Weg 12, 55128 Mainz, Germany
| | - Malte Strozyk
- Institute of Physical Chemistry, University of Mainz , Duesbergweg 10-14, 55128 Mainz, Germany
| | - Rubén Ahijado-Guzmán
- Institute of Physical Chemistry, University of Mainz , Duesbergweg 10-14, 55128 Mainz, Germany
| | - Carsten Sönnichsen
- Institute of Physical Chemistry, University of Mainz , Duesbergweg 10-14, 55128 Mainz, Germany
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35
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Han R, Song W, Wang X, Mao Z, Han XX, Zhao B. Investigation of charge transfer at the TiO2–MBA–Au interface based on surface-enhanced Raman scattering: SPR contribution. Phys Chem Chem Phys 2018; 20:5666-5673. [DOI: 10.1039/c8cp00014j] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Investigation of SPR contribution to interfacial charge transfer by tuning the SPR of the assemblies and excitation wavelength.
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Affiliation(s)
- Rui Han
- State Key Laboratory of Supramolecular Structure and Materials
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Wei Song
- State Key Laboratory of Supramolecular Structure and Materials
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Xu Wang
- State Key Laboratory of Supramolecular Structure and Materials
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Zhu Mao
- Department of chemistry and Life Sciences, Changchun University of Technology
- Changchun
- P. R. China
| | - Xiao Xia Han
- State Key Laboratory of Supramolecular Structure and Materials
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Bing Zhao
- State Key Laboratory of Supramolecular Structure and Materials
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130012
- P. R. China
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36
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A molecular beacon based on DNA-templated silver nanoclusters for the highly sensitive and selective multiplexed detection of virulence genes. Talanta 2017; 181:24-31. [PMID: 29426508 DOI: 10.1016/j.talanta.2017.12.049] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 11/30/2017] [Accepted: 12/14/2017] [Indexed: 10/18/2022]
Abstract
In this work, we develop a fluorescent molecular beacon based on the DNA-templated silver nanoclusters (DNA-Ag NCs). The skillfully designed molecular beacon can be conveniently used for detection of diverse virulence genes as long as the corresponding recognition sequences are embedded. Importantly, the constructed detection system allows simultaneous detection of multiple nucleic acids, which is attributed to non-overlapping emission spectra of the as-synthesized silver nanoclusters. Based on the target-induced fluorescence enhancement, three infectious disease-related genes HIV, H1N1, and H5N1 are detected, and the corresponding detection limits are 3.53, 0.12 and 3.95nM, respectively. This design allows specific, versatile and simultaneous detection of diverse targets with easy operation and low cost.
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37
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Kumar A, Naushad M, Rana A, Inamuddin, Preeti, Sharma G, Ghfar AA, Stadler FJ, Khan MR. ZnSe-WO3 nano-hetero-assembly stacked on Gum ghatti for photo-degradative removal of Bisphenol A: Symbiose of adsorption and photocatalysis. Int J Biol Macromol 2017; 104:1172-1184. [DOI: 10.1016/j.ijbiomac.2017.06.116] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 06/25/2017] [Accepted: 06/29/2017] [Indexed: 01/23/2023]
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38
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Roman BJ, Otto J, Galik C, Downing R, Sheldon M. Au Exchange or Au Deposition: Dual Reaction Pathways in Au-CsPbBr 3 Heterostructure Nanoparticles. NANO LETTERS 2017; 17:5561-5566. [PMID: 28759245 DOI: 10.1021/acs.nanolett.7b02355] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We have designed a facile synthetic strategy for the selective deposition of Au metal on all-inorganic CsPbBr3 perovskite nanocrystals that includes the addition of PbBr2 salt along with AuBr3 salt. PbBr2 is necessary because the addition of Au3+ to solutions of CsPbBr3 nanocrystals otherwise results in the exchange of Au3+ ions from solution with Pb2+ cations within the nanocrystal lattice to produce Cs2AuIAuIIIBr6 nanocrystals with a tetragonal crystal structure and a band gap of about 1.6 eV, in addition to Au metal deposition. Including excess Pb2+ ions in solution prevents the exchange reaction. Au metal deposits on the surface of the nanocrystals to produce the Au-CsPbBr3 heterostructure nanoparticles with an Au particle diameter determined by the Au3+ ion concentration. Fluorescence quenching caused by Au deposition monotonically increases with deposition size, but the fluorescence quantum yield (QY) is significantly greater than if any cation exchange has occurred. An optimized synthesis can produce Au-CsPbBr3 nanoparticles with 70% QY and no evidence of cation exchange.
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Affiliation(s)
- Benjamin J Roman
- Department of Chemistry and ‡Department of Material Science and Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Joseph Otto
- Department of Chemistry and ‡Department of Material Science and Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Christopher Galik
- Department of Chemistry and ‡Department of Material Science and Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Rachel Downing
- Department of Chemistry and ‡Department of Material Science and Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Matthew Sheldon
- Department of Chemistry and ‡Department of Material Science and Engineering, Texas A&M University , College Station, Texas 77843, United States
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39
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Ong X, Gupta S, Wu WY, Chakrabortty S, Chan Y. Facet-to-facet Linking of Shape-anisotropic Colloidal Cadmium Chalcogenide Nanostructures. J Vis Exp 2017. [PMID: 28829411 DOI: 10.3791/56009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Here, we describe a protocol that allows for shape-anisotropic cadmium chalcogenide nanocrystals (NCs), such as nanorods (NRs) and tetrapods (TPs), to be covalently and site-specifically linked via their end facets, resulting in polymer-like linear or branched chains. The linking procedure begins with a cation-exchange process in which the end facets of the cadmium chalcogenide NCs are first converted to silver chalcogenide. This is followed by the selective removal of ligands at their surface. This results in cadmium chalcogenide NCs with highly reactive silver chalcogenide end facets that spontaneously fuse upon contact with each other, thereby establishing an interparticle facet-to-facet attachment. Through the judicious choice of precursor concentrations, an extensive network of linked NCs can be produced. Structural characterization of the linked NCs is carried out via low- and high-resolution transmission electron microscopy (TEM), as well as energy-dispersive X-ray spectroscopy, which confirm the presence of silver chalcogenide domains between chains of cadmium chalcogenide NCs.
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Affiliation(s)
- Xuanwei Ong
- Department of Chemistry, National University of Singapore
| | - Shashank Gupta
- Department of Chemistry, National University of Singapore
| | - Wen-Ya Wu
- Materials Processing and Characterisation Department, A*STAR, Institute of Materials Research and Engineering
| | | | - Yinthai Chan
- Department of Chemistry, National University of Singapore; Ceramics Department, A*STAR, Institute of Materials Research and Engineering;
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40
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Dana J, Maity P, Ghosh HN. Hot-electron transfer from the semiconductor domain to the metal domain in CdSe@CdS{Au} nano-heterostructures. NANOSCALE 2017; 9:9723-9731. [PMID: 28675235 DOI: 10.1039/c7nr02232h] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Semiconductor-metal hybrid nanostructures are recognized as great materials due to their high level of light-induced charge separation, which has direct relevance in photocatalysis and solar energy conversion. To understand the mechanism of charge separation processes, hybrid CdSe@CdS{Au} nano-heterostructures containing Au nanoparticles (NPs) with different sizes were synthesized, and the ultrafast charge-transfer dynamics were monitored using femtosecond transient absorption spectroscopy. Steady-state optical absorption studies suggest the formation of charge-transfer complexes between core shell nanocrystals (NCs) and Au NPs. Steady-state and time-resolved luminescence spectroscopy suggest electron transfer from the photo-excited CdSe@CdS core shell QDs NCs to the Au NPs within the heterostructure. The ultrafast interfacial electron-transfer dynamics in the heterostructures were monitored by femtosecond transient absorption spectroscopy. The results revealed that both hot and thermalized electrons are transferred from the core shell QDs to the metal NPs with time constants of 150 and 300 fs, respectively. Hot-electron transfer from QDs to Au NPs was found to take place predominantly in the heterostructures depending on the sizes of the metal NPs. The photo-degradation of rhodamin B in the presence of the CdSe@CdS{Au} heterostructures under visible-light radiation suggests that the hot electrons in the heterostructures play a major role in photocatalytic degradation.
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Affiliation(s)
- Jayanta Dana
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Homi Bhabha National Instutute, Mumbai-400085, India
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41
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Ibañez D, Galindo M, Colina A, Valles E, Heras A, Gomez E. Silver nanoparticles/free-standing carbon nanotube Janus membranes. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.04.106] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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42
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Wang Y, Yan C, Chen L, Zhang Y, Yang J. Controllable Charge Transfer in Ag-TiO₂ Composite Structure for SERS Application. NANOMATERIALS 2017; 7:nano7070159. [PMID: 28657599 PMCID: PMC5535225 DOI: 10.3390/nano7070159] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 06/01/2017] [Accepted: 06/16/2017] [Indexed: 12/12/2022]
Abstract
The nanocaps array of TiO2/Ag bilayer with different Ag thicknesses and co-sputtering TiO2-Ag monolayer with different TiO2 contents were fabricated on a two-dimensional colloidal array substrate for the investigation of Surface enhanced Raman scattering (SERS) properties. For the TiO2/Ag bilayer, when the Ag thickness increased, SERS intensity decreased. Meanwhile, a significant enhancement was observed when the sublayer Ag was 10 nm compared to the pure Ag monolayer, which was ascribed to the metal-semiconductor synergistic effect that electromagnetic mechanism (EM) provided by roughness surface and charge-transfer (CT) enhancement mechanism from TiO2-Ag composite components. In comparison to the TiO2/Ag bilayer, the co-sputtered TiO2-Ag monolayer decreased the aggregation of Ag particles and led to the formation of small Ag particles, which showed that TiO2 could effectively inhibit the aggregation and growth of Ag nanoparticles.
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Affiliation(s)
- Yaxin Wang
- Key Laboratory of Functional Materials Physics and Chemistry, Jilin Normal University, Ministry of Education, Siping 136000, China.
| | - Chao Yan
- Key Laboratory of Functional Materials Physics and Chemistry, Jilin Normal University, Ministry of Education, Siping 136000, China.
| | - Lei Chen
- Key Laboratory of Functional Materials Physics and Chemistry, Jilin Normal University, Ministry of Education, Siping 136000, China.
| | - Yongjun Zhang
- Key Laboratory of Functional Materials Physics and Chemistry, Jilin Normal University, Ministry of Education, Siping 136000, China.
| | - Jinghai Yang
- Key Laboratory of Functional Materials Physics and Chemistry, Jilin Normal University, Ministry of Education, Siping 136000, China.
- Key Laboratory of Excited State Physics, Changchun Institute of Optics Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
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43
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Yu H, Li X, Hao Z, Xiong W, Guo L, Lu Y, Yi R, Li J, Yang X, Zeng X. Fabrication of metal/semiconductor nanocomposites by selective laser nano-welding. NANOSCALE 2017; 9:7012-7015. [PMID: 28534918 DOI: 10.1039/c7nr01854a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A green and simple method to prepare metal/semiconductor nanocomposites by selective laser nano-welding metal and semiconductor nanoparticles was presented, in which the sizes, phases, and morphologies of the components can be maintained. Many types of nanocomposites (such as Ag/TiO2, Ag/SnO2, Ag/ZnO2, Pt/TiO2, Pt/SnO2, and Pt/ZnO) can be prepared by this method and their corresponding performances were enhanced.
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Affiliation(s)
- Huiwu Yu
- Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology (HUST), Wuhan, Hubei 430074, P. R. China.
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44
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Zhang B, Wei C. Highly sensitive and selective fluorescence detection of Hg2+ based on turn-on aptamer DNA silver nanoclusters. RSC Adv 2017. [DOI: 10.1039/c7ra11566k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel turn-on fluorescent biosensor based on C–Hg2+-aptamer-1-DNA-templated silver nanoclusters (Ag NCs) was developed for the quantitative analysis of Hg2+.
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Affiliation(s)
- Baozhu Zhang
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education
- Institute of Molecular Science
- Shanxi University
- Taiyuan 030006
- P. R. China
| | - Chunying Wei
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education
- Institute of Molecular Science
- Shanxi University
- Taiyuan 030006
- P. R. China
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45
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Pavlopoulos NG, Dubose JT, Liu Y, Huang X, Pinna N, Willinger MG, Lian T, Char K, Pyun J. Type I vs. quasi-type II modulation in CdSe@CdS tetrapods: ramifications for noble metal tipping. CrystEngComm 2017. [DOI: 10.1039/c7ce01558e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report on noble metal tipping of heterostructured nanocrystals (NCs) of CdSe@CdS tetrapods (TPs) as a chemical reaction to manifest energetic differences between type I and quasi-type II heterojunctions.
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Affiliation(s)
| | - Jeffrey T. Dubose
- Department of Chemistry and Biochemistry
- University of Arizona
- Tucson
- USA
| | - Yawei Liu
- Department of Chemistry
- Emory University
- Atlanta
- USA
| | - Xing Huang
- Institut fur Chemie
- Humboldt-Universitat zu Berlin
- 12489 Berlin
- Germany
| | - Nicola Pinna
- Department of Inorganic Chemistry
- Fritz Haber Institute of the Max Planck Society
- Berlin
- Germany
| | | | | | - Kookheon Char
- World Class University Program for Chemical Convergence for Energy and Environment
- School of Chemical and Biological Engineering
- Seoul National University
- Seoul 151-744
- Korea
| | - Jeffrey Pyun
- Department of Chemistry and Biochemistry
- University of Arizona
- Tucson
- USA
- World Class University Program for Chemical Convergence for Energy and Environment
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46
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Tan CF, Azmansah SAB, Zhu H, Xu QH, Ho GW. Spontaneous Electroless Galvanic Cell Deposition of 3D Hierarchical and Interlaced S-M-S Heterostructures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1604417. [PMID: 27758002 DOI: 10.1002/adma.201604417] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 09/13/2016] [Indexed: 06/06/2023]
Abstract
One-pot electroless galvanic cell deposition of a 3D hierarchical semiconductor-metal-semiconductor interlaced nanoarray is demonstrated. The fabricated 3D photoanode deviates from the typical planar geometry, and aims to optimize the effective surface area for light harvesting and long-range charge transfer-collection pathways.
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Affiliation(s)
- Chuan Fu Tan
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore, 117583
| | - Siti Aishah Bte Azmansah
- Engineering Science Programme, National University of Singapore, 9 Engineering Drive 1, Singapore, 117575
| | - Hai Zhu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543
| | - Qing-Hua Xu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543
| | - Ghim Wei Ho
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore, 117583
- Engineering Science Programme, National University of Singapore, 9 Engineering Drive 1, Singapore, 117575
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore, 117602
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47
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Ibañez D, Garoz-Ruiz J, Plana D, Heras A, Fermín D, Colina A. Spectroelectrochemistry at free-standing carbon nanotubes electrodes. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.09.074] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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48
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Fang Y, Zhang B, Hong L, Zhang K, Li G, Jiang J, Yan R, Chen J. Mechanism of photocatalytic activity improvement of AgNPs/TiO 2 by oxygen plasma irradiation. NANOSCALE 2016; 8:17004-17011. [PMID: 27714110 DOI: 10.1039/c6nr04862e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Plasmonic metal Ag nanoparticles (AgNPs) on TiO2 thin films (AgNPs/TiO2) are a kind of excellent photocatalyst of high efficiency under visible light, and thus draw great interest nowadays. Further improvement of their photocatalytic activity (PA) is difficult but is of high importance for their applications. In this paper, oxygen plasma was taken to partially oxidize AgNPs deposited on the surface of TiO2 to form a structure with the configuration of a p-type semiconductor/plasmonic metal/n-type semiconductor (Ag2O/AgNPs/TiO2). The localized surface plasmon resonance (LSPR) of the AgNPs was strongly damped after oxygen plasma irradiation (OPI) but the photocatalytic activity was improved. The mechanisms of the photocatalytic activity improvement under UV and visible light were explored based on charge kinetics.
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Affiliation(s)
- Yingcui Fang
- Department of Vacuum Science and Technology, Hefei University of Technology, Hefei, 230009, China.
| | - Bing Zhang
- Department of Vacuum Science and Technology, Hefei University of Technology, Hefei, 230009, China.
| | - Liu Hong
- Department of Vacuum Science and Technology, Hefei University of Technology, Hefei, 230009, China.
| | - Kang Zhang
- Department of Vacuum Science and Technology, Hefei University of Technology, Hefei, 230009, China.
| | - Gongpu Li
- Hefei National Laboratory for Physical Sciences at the Microscale, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), and School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230026, China.
| | - Jun Jiang
- Hefei National Laboratory for Physical Sciences at the Microscale, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), and School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230026, China.
| | - Rong Yan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, 230031, China.
| | - Junling Chen
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, 230031, China.
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49
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The aptamer DNA-templated fluorescence silver nanoclusters: ATP detection and preliminary mechanism investigation. Biosens Bioelectron 2016; 87:422-427. [PMID: 27589406 DOI: 10.1016/j.bios.2016.08.079] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 08/23/2016] [Accepted: 08/24/2016] [Indexed: 01/07/2023]
Abstract
Two general and reliable fluorescence sensors were proposed in this work utilizing aptamer DNA-templated silver nanoclusters (Ag NCs). Both DNA-AgNCs could be used for label-free detecting of ATP with the limits of detection of 0.44 and 0.65mM. One of them was further applied to monitor the activity of adenosine deaminase (ADA). In our effort to elucidate the light-up mechanism, we studied a total of six Ag NCs prepared by different DNA sequences, and found that they showed different sensitivity to ATP. Both BT3T3- and BT3T3(R)-templated Ag NCs were chose to make particular studies by UV-vis, TEM, fluorescence, and TCSPC methods. The results showed that when DNA-Ag NCs was kept for 1.5h and presented a strong fluorescence, the addition of ATP failed to cause a large change of fluorescence intensity; on the contrary, after Ag NCs was kept for 24h and emitted a weak fluorescence, adding ATP was able to result in the large fluorescence enhanced of 43 and 33 times for BT3T3- and BT3T3(R)-templated Ag NCs, respectively. The possible mechanism was also suggested that ATP binding to aptamer segment of template induced the change of the DNA secondary structure, which made the aggregated Ag nanoparticles disperse into Ag NCs with an average diameter of about 2nm that were responsible for the large fluorescence increase. Moreover, ATP could protect the fluorescence intensity of BT3T3(R)-templated Ag NCs from quenching for at least 9h.
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50
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Ben-Shahar Y, Banin U. Hybrid Semiconductor–Metal Nanorods as Photocatalysts. Top Curr Chem (Cham) 2016; 374:54. [DOI: 10.1007/s41061-016-0052-0] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 07/07/2016] [Indexed: 11/30/2022]
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