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Kim T, Jang JG, Kim SH, Hong J. Molecular Engineering for Enhanced Thermoelectric Performance of Single-Walled Carbon Nanotubes/π-Conjugated Organic Small Molecule Hybrids. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2302922. [PMID: 37863818 PMCID: PMC10667833 DOI: 10.1002/advs.202302922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 09/04/2023] [Indexed: 10/22/2023]
Abstract
Hybridizing single-walled carbon nanotubes (SWCNTs) with π-conjugated organic small molecules (π-OSMs) offers a promising approach for producing high-performance thermoelectric (TE) materials through the facile optimization of the molecular geometry and energy levels of π-OSMs. Designing a twisted molecular structure for the π-OSM with the highest occupied molecular orbital energy level comparable to the valence band of SWCNTs enables effective energy filtering between the two materials. The SWCNTs/twisted π-OSM hybrid exhibits a high Seebeck coefficient of 110.4 ± 2.6 µV K-1 , leading to a significantly improved power factor of 2,136 µW m-1 K-2 , which is 2.6 times higher than that of SWCNTs. Moreover, a maximum figure of merit over 0.13 at room temperature is achieved via the efficient TE transport of the SWCNTs/twisted π-OSM hybrid. The study highlights the promising potential of optimizing molecular engineering of π-OSMs for hybridization with SWCNTs to create next-generation, efficient TE materials.
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Affiliation(s)
- Tae‐Hoon Kim
- Department of ChemistrySeoul National UniversitySeoul08826South Korea
| | - Jae Gyu Jang
- Department of ChemistrySeoul National UniversitySeoul08826South Korea
- Department of Carbon Convergence EngineeringWonkwang UniversityIksan54538South Korea
| | - Sung Hyun Kim
- Department of Carbon Convergence EngineeringWonkwang UniversityIksan54538South Korea
| | - Jong‐In Hong
- Department of ChemistrySeoul National UniversitySeoul08826South Korea
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2
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Charoenpakdee J, Suntijitrungruang O, Boonchui S. Investigating valley-dependent current generation due to asymmetric energy dispersion for charge-transfer from a quantum dot to single-walled carbon nanotube. Sci Rep 2023; 13:3105. [PMID: 36813853 PMCID: PMC9947177 DOI: 10.1038/s41598-023-30247-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Accepted: 02/20/2023] [Indexed: 02/24/2023] Open
Abstract
Single-wall carbon nanotubes (SWCNT), which consist of a two-dimensional hexagonal lattice of carbon atoms, possess unique mechanical, electrical, optical and thermal properties. SWCNT can be synthesized in diverse chiral indexes to determine certain attributes. This work theoretically investigates electron transport in different directions along SWCNT. The electron studied in this research transfers from the quantum dot that can possibly move to the right or left direction in SWCNT with different valley-dependent probability. These results show that valley polarized current is present. The valley current in the right and left directions has a composition of valley degrees of freedom where its components (K and K') are not identical. Such a result can be traced theoretically by certain effects. That firstly is the curvature effect on SWCNT in which the hopping integral between [Formula: see text] electrons from the flat graphene is altered, and another is curvature-inducing [Formula: see text] mixture. Due to these effects, the band structure of SWCNT is asymmetric in certain chiral indexes leading to the asymmetry of valley electron transport. Our results exhibit that the zigzag chiral indexes is the only type making electron transport symmetrical that is different to the result from the other chiral index types which are the armchair and chiral. This work also illustrates the characteristic of the electron wave function propagating from the initial point to the tip of the tube over time, and the current density of the probability in specific times. Additionally, our research simulates the result from the dipole interaction between the electron in QD and the tube that impacts the lifetime of the electron being in QD. The simulation portrays that more dipole interaction encourages the electron transfer to the tube, thereby shortening the lifetime. We as well suggest the reversed electron transfer from the tube to QD that the time duration of such transfer is much less than the opposite transfer owing to the different orbital of the electron's states. Valley polarized current in SWCNTs may also be used in the development of energy storage devices such as batteries and supercapacitors. The performance and effectiveness of nanoscale devices, including transistors, solar cells, artificial antennas, quantum computers, and nano electronic circuits, must be improved in order to achieve a variety of benefits.
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Affiliation(s)
- J. Charoenpakdee
- grid.9723.f0000 0001 0944 049XDepartment of Physics, Faculty of Science, Kasetsart University, Bangkok, 10900 Thailand
| | - Ongart Suntijitrungruang
- grid.9723.f0000 0001 0944 049XDepartment of Physics, Faculty of Science, Kasetsart University, Bangkok, 10900 Thailand
| | - S. Boonchui
- grid.9723.f0000 0001 0944 049XDepartment of Physics, Faculty of Science, Kasetsart University, Bangkok, 10900 Thailand ,grid.9723.f0000 0001 0944 049XCenter of Rubber and Polymer Materials in Agriculture and Industry (RPM), Faculty of Science, Kasetsart University, Bangkok, 10900 Thailand
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3
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Voigt D, Primavera G, Uphoff H, Rethmeier JA, Schepp L, Bredol M. Ternary Chalcogenide-Based Quantum Dots and Carbon Nanotubes: Establishing a Toolbox for Controlled Formation of Nanocomposites. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2022; 126:9076-9090. [PMID: 35686224 PMCID: PMC9169613 DOI: 10.1021/acs.jpcc.2c01142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 04/26/2022] [Indexed: 06/15/2023]
Abstract
A general procedure based on electrostatic self-assembly for preparing nanocomposites based on carbon nanotubes (CNTs) and ternary chalcogenide semiconductor nanoparticles is shown. This was achieved by surface functionalization of the single components through well-established protocols, for CNTs, and a transferable general strategy for the nanoparticles. Heterostructures were then synthesized through electrostatic interaction between oppositely charged components. Structural, colloidal, and optical properties were characterized by transmission electron microscopy, X-ray diffraction, infrared spectroscopy, dynamic light scattering, ζ-potential, and absorption- and (time-resolved) photoluminescence measurements. Interestingly, the nanocomposites showed a blue shift in their excitation and emission spectra when compared to the pure nanoparticles but only when analyzed in powder form. Further investigations in the form of density functional theory (DFT) calculations were performed to evaluate the origin of the change in the optical properties.
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Affiliation(s)
- Dominik Voigt
- Department
of Chemical Engineering, FH Münster
University of Applied Sciences, Stegerwaldstr. 39, 48565 Steinfurt, Germany
| | - Giulia Primavera
- Department
of Chemical Engineering, FH Münster
University of Applied Sciences, Stegerwaldstr. 39, 48565 Steinfurt, Germany
| | - Holger Uphoff
- Department
of Physical Engineering, FH Münster
University of Applied Sciences, Stegerwaldstr. 39, 48565 Steinfurt, Germany
| | - Jan Alexander Rethmeier
- Department
of Chemical Engineering, FH Münster
University of Applied Sciences, Stegerwaldstr. 39, 48565 Steinfurt, Germany
| | - Lukas Schepp
- Department
of Chemical Engineering, FH Münster
University of Applied Sciences, Stegerwaldstr. 39, 48565 Steinfurt, Germany
| | - Michael Bredol
- Department
of Chemical Engineering, FH Münster
University of Applied Sciences, Stegerwaldstr. 39, 48565 Steinfurt, Germany
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4
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Kumar A, Swami SK, Sharma R, Yadav S, Singh VN, Schneider JJ, Sinha OP, Srivastava R. A study on structural, optical, and electrical characteristics of perovskite CsPbBr 3 QD/2D-TiSe 2 nanosheet based nanocomposites for optoelectronic applications. Dalton Trans 2022; 51:4104-4112. [PMID: 35179542 DOI: 10.1039/d1dt03423e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Lead halide perovskite (CsPbBr3) quantum dots (QDs) and two-dimensional (2D) layered transition metal dichalcogenides have a significant application in solution-processed optoelectronic devices. Here, we report the oleylamine-assisted exfoliation of TiSe2 nanosheets (NSs) in dichlorobenzene with high concentration and stable dispersion. The functionalized TiSe2 NSs were used to synthesize the solution-processed perovskite CsPbBr3 QD/TiSe2 NS-based nanocomposite. The perovskite QDs and TiSe2 NSs were characterized by different techniques. The strong photoluminescence (PL) quenching and decreased lifetime decay of the nanocomposite indicates efficient charge transfer from photo-excited CsPbBr3 to TiSe2 NSs. The calculated charge-transfer rate constant (KET) from photo-excited CsPbBr3 to TiSe2 NSs increased from 1.50 × 108 to 2.79 × 108 s-1 in different concentrations of TiSe2 NSs (5 to 20 μg mL-1), respectively. Furthermore, the photo-currents of CsPbBr3 QD/TiSe2 NS nanocomposite devices were dramatically enhanced ∼2 times compared to pristine CsPbBr3 QD based devices, which supports the charge transfer and charge separation in nanocomposite devices.
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Affiliation(s)
- Ashish Kumar
- CSIR-National Physical Laboratory, Dr KS Krishnan Marg, New Delhi-110012, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Sanjay Kumar Swami
- CSIR-National Physical Laboratory, Dr KS Krishnan Marg, New Delhi-110012, India.
| | - Rohit Sharma
- Amity Institute of Nanotechnology, Amity University UP, Noida, UP, India.
| | - Sandeep Yadav
- Technische Universität Darmstadt, Eduard-Zintl-Institut für Anorganische and Physikalische Chemie, Alarich-Weiss-Str.12, D-64287 Darmstadt, Germany
| | - V N Singh
- CSIR-National Physical Laboratory, Dr KS Krishnan Marg, New Delhi-110012, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Joerg J Schneider
- Technische Universität Darmstadt, Eduard-Zintl-Institut für Anorganische and Physikalische Chemie, Alarich-Weiss-Str.12, D-64287 Darmstadt, Germany
| | - O P Sinha
- Amity Institute of Nanotechnology, Amity University UP, Noida, UP, India.
| | - Ritu Srivastava
- CSIR-National Physical Laboratory, Dr KS Krishnan Marg, New Delhi-110012, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
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5
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Microwave-assisted ultrafast in-situ growth of N-doped carbon quantum dots on multiwalled carbon nanotubes as an efficient electrocatalyst for photovoltaics. J Colloid Interface Sci 2021; 586:349-361. [DOI: 10.1016/j.jcis.2020.10.098] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Revised: 10/22/2020] [Accepted: 10/24/2020] [Indexed: 12/27/2022]
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6
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A New Nanocomposite Electrode of Carbon Quantum Dots Doped Functionalized Multi-walled Carbon Nanotubes for Lethal Mercury Sensing. J CLUST SCI 2020. [DOI: 10.1007/s10876-020-01770-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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7
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Bansal P, Zhang X, Wang H, Kar P, Yu WW. Charge transfer between lead halide perovskite nanocrystals and single-walled carbon nanotubes. NANOSCALE ADVANCES 2020; 2:808-813. [PMID: 36133236 PMCID: PMC9417507 DOI: 10.1039/c9na00766k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Accepted: 01/02/2020] [Indexed: 06/15/2023]
Abstract
A charge transfer study between lead halide-based perovskite nanocrystals and single-walled carbon nanotubes (PNC@CNT nanocomposite) was performed. Solution-processed MAPbX3 PNCs displayed very bright luminescence, but it quenched in the presence of CNTs. This was attributed to the electron transfer from PNCs to CNTs. The detailed changes in fluorescence lifetime were investigated through time-correlated single-photon counting (TCSPC), which suggested mixed static and dynamic quenching along with a decrease in the lifetime. Morphological changes were investigated via transmission electron microscopy (TEM) and attributed to the incorporation of PNCs on long CNTs. Also, the PNC@CNT nanocomposite was explored for photoinduced current response, which indicated an ∼3 fold increase in photoconductivity under light illumination (with a 1 mV bias). This electron transfer study between PNCs and CNTs contributes to the exploration of charge dynamics.
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Affiliation(s)
- Parul Bansal
- Department of Chemistry, Indian Institute of Technology Roorkee Uttarakhand 247667 India
- Department of Chemistry and Physics, Louisiana State University Shreveport Louisiana 71115 USA
| | - Xiangtong Zhang
- Department of Chemistry and Physics, Louisiana State University Shreveport Louisiana 71115 USA
| | - Hua Wang
- Department of Chemistry and Physics, Louisiana State University Shreveport Louisiana 71115 USA
| | - Prasenjit Kar
- Department of Chemistry, Indian Institute of Technology Roorkee Uttarakhand 247667 India
| | - William W Yu
- Department of Chemistry and Physics, Louisiana State University Shreveport Louisiana 71115 USA
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8
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Eserci H, Şenkuytu E, Okutan E. New cyclotriphosphazene based nanotweezers bearing perylene and glycol units and their non-covalent interactions with single walled carbon nanotubes. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.01.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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9
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Yamauchi M, Masuo S. Colloidal Quantum Dot Arrangement Assisted by Perylene Bisimide Self-Assembly. Chemistry 2018; 25:167-172. [PMID: 30398692 DOI: 10.1002/chem.201805119] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 10/31/2018] [Indexed: 01/08/2023]
Abstract
Colloidal semiconductor nanocrystals, so-called quantum dots (QDs), are attractive as molecular-like smart nanomaterials, and their emission and optoelectronic properties in the dispersed state have been actively studied. The construction of supramolecular structures composed of multiple QDs, however, is still challenging. Here, a new strategy to form supramolecular QD structures via self-assembly of perylene bisimide (PBI) dyes is demonstrated. In a mixed solution, QDs and PBI undergo time-dependent fusion to form an isolated colloidal QD-PBI complex or a unique QD-PBI co-aggregate composed of QDs arranged along a sheet-like PBI nanostructure, and these dramatically different supramolecular structures can be controlled by the solvent polarity.
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Affiliation(s)
- Mitsuaki Yamauchi
- Department of Applied Chemistry for Environment, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Sadahiro Masuo
- Department of Applied Chemistry for Environment, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
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10
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Saha A, Moya A, Kahnt A, Iglesias D, Marchesan S, Wannemacher R, Prato M, Vilatela JJ, Guldi DM. Interfacial charge transfer in functionalized multi-walled carbon nanotube@TiO 2 nanofibres. NANOSCALE 2017; 9:7911-7921. [PMID: 28569304 DOI: 10.1039/c7nr00759k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A new insight into photoinduced charge transfer processes across carbon nanotube@TiO2 interfaces has been gained based on experimental details from transient absorption spectroscopy. We show that photoinduced, interfacial hole transfer to carboxylic acid-functionalized multiwalled carbon nanotubes (oxMWCNTs) from TiO2 results in hole-doped oxMWCNTs and reduced TiO2. The latter is inferred from femto- and nanosecond transient absorption spectroscopy performed with oxMWCNT@TiO2 dispersions and complemented with investigations using methyl viologen and N,N,N',N'-tetramethyl-p-phenylenediamine as an electron scavenger and a hole scavenger, respectively. The results of ultraviolet photoemission spectroscopy (UPS) of the compounds corroborate the findings, highlighting the strong coupling between oxMWCNTs and TiO2 in these hybrids.
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Affiliation(s)
- Avishek Saha
- Department of Chemistry & Pharmacy and Interdisciplinary Center for Molecular Materials, Friedrich Alexander University Erlangen-Nuremberg, Egerlandstrasse 3, 91058 Erlangen, Germany.
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11
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Chinta JP, Waiskopf N, Lubin G, Rand D, Hanein Y, Banin U, Yitzchaik S. Carbon Nanotube and Semiconductor Nanorods Hybrids: Preparation, Characterization, and Evaluation of Photocurrent Generation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:5519-5526. [PMID: 28497974 DOI: 10.1021/acs.langmuir.6b04599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Carbon nanotubes (CNTs) and semiconductor nanocrystals (SCNCs) are known to be interesting donor-acceptor partners due to their unique optical and electronic properties. These exciting features have led to the development of novel composites based on these two nanomaterials and to their characterization for use in various applications, such as components in sensors, transistors, solar cells and biomedical devices. Two approaches based on covalent and noncovalent methods have been suggested for coupling the SCNCs to CNTs. Most covalent conjugation methods used so far were found to disrupt the electronic structure of the CNTs or interfere with charge transfer in the CNT-SCNC interface. Moreover, it offers random and poorly organized nanoparticle coatings. Therefore, noncovalent methods are considered to be ideal for better electronic coupling. However, a key common drawback of noncovalent methods is the lack of stability which hampers their applicability. In this article, a method has been developed to couple semiconductor seeded nanorods onto CNTs through π-π interactions. The CNTs and pyrene conjugated SCNC hybrid materials were characterized by both microscopic and spectroscopic techniques. Fluorescence and photocurrent measurements suggest the proposed pi-stacking approach results in a strong electronic coupling between the CNTs and the SCNCs leading to better photocurrent efficiency than that of a covalent conjugation method reported using similar SCNC material. Overall, the CNT-SCNC films reported in the present study open the scope for the fabrication of optoelectronic devices for various applications.
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Affiliation(s)
- Jugun Prakash Chinta
- Institute of Chemistry and ‡The Harvey M. Krueger Family Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem , Jerusalem 91904, Israel
- School of Electrical Engineering and ∥Tel Aviv University Center for Nanoscience and Nanotechnology, Tel Aviv University , Tel Aviv 69978, Israel
| | - Nir Waiskopf
- Institute of Chemistry and ‡The Harvey M. Krueger Family Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem , Jerusalem 91904, Israel
- School of Electrical Engineering and ∥Tel Aviv University Center for Nanoscience and Nanotechnology, Tel Aviv University , Tel Aviv 69978, Israel
| | - Gur Lubin
- Institute of Chemistry and ‡The Harvey M. Krueger Family Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem , Jerusalem 91904, Israel
- School of Electrical Engineering and ∥Tel Aviv University Center for Nanoscience and Nanotechnology, Tel Aviv University , Tel Aviv 69978, Israel
| | - David Rand
- Institute of Chemistry and ‡The Harvey M. Krueger Family Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem , Jerusalem 91904, Israel
- School of Electrical Engineering and ∥Tel Aviv University Center for Nanoscience and Nanotechnology, Tel Aviv University , Tel Aviv 69978, Israel
| | - Yael Hanein
- Institute of Chemistry and ‡The Harvey M. Krueger Family Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem , Jerusalem 91904, Israel
- School of Electrical Engineering and ∥Tel Aviv University Center for Nanoscience and Nanotechnology, Tel Aviv University , Tel Aviv 69978, Israel
| | - Uri Banin
- Institute of Chemistry and ‡The Harvey M. Krueger Family Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem , Jerusalem 91904, Israel
- School of Electrical Engineering and ∥Tel Aviv University Center for Nanoscience and Nanotechnology, Tel Aviv University , Tel Aviv 69978, Israel
| | - Shlomo Yitzchaik
- Institute of Chemistry and ‡The Harvey M. Krueger Family Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem , Jerusalem 91904, Israel
- School of Electrical Engineering and ∥Tel Aviv University Center for Nanoscience and Nanotechnology, Tel Aviv University , Tel Aviv 69978, Israel
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12
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Wang L, Han J, Sundahl B, Thornton S, Zhu Y, Zhou R, Jaye C, Liu H, Li ZQ, Taylor GT, Fischer DA, Appenzeller J, Harrison RJ, Wong SS. Ligand-induced dependence of charge transfer in nanotube-quantum dot heterostructures. NANOSCALE 2016; 8:15553-15570. [PMID: 27368081 DOI: 10.1039/c6nr03091b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
As a model system to probe ligand-dependent charge transfer in complex composite heterostructures, we fabricated double-walled carbon nanotube (DWNT)-CdSe quantum dot (QD) composites. Whereas the average diameter of the QDs probed was kept fixed at ∼4.1 nm and the nanotubes analyzed were similarly oxidatively processed, by contrast, the ligands used to mediate the covalent attachment between the QDs and DWNTs were systematically varied to include p-phenylenediamine (PPD), 2-aminoethanethiol (AET), and 4-aminothiophenol (ATP). Herein, we have put forth a unique compilation of complementary data from experiment and theory, including results from transmission electron microscopy (TEM), near-edge X-ray absorption fine structure (NEXAFS) spectroscopy, Raman spectroscopy, electrical transport measurements, and theoretical modeling studies, in order to fundamentally assess the nature of the charge transfer between CdSe QDs and DWNTs, as a function of the structure of various, intervening bridging ligand molecules. Specifically, we correlated evidence of charge transfer as manifested by changes and shifts associated with NEXAFS intensities, Raman peak positions, and threshold voltages both before and after CdSe QD deposition onto the underlying DWNT surface. Importantly, for the first time ever in these types of nanoscale composite systems, we have sought to use theoretical modeling to justify and account for our experimental results. Our overall data suggest that (i) QD coverage density on the DWNTs varies, based upon the different ligand pendant groups used and that (ii) the presence of a π-conjugated carbon framework within the ligands themselves coupled with the electron affinity of their pendant groups collectively play important roles in the resulting charge transfer from QDs to the underlying CNTs.
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Affiliation(s)
- Lei Wang
- Department of Chemistry, State University of New York at Stony Brook, Stony Brook, NY 11794-3400, USA.
| | - Jinkyu Han
- Condensed Matter Physics and Materials Sciences Division, Brookhaven National Laboratory, Building 480, Upton, NY 11973, USA
| | - Bryan Sundahl
- Institute of Advanced Computational Science, State University of New York at Stony Brook, Stony Brook, NY 11794, USA
| | - Scott Thornton
- Institute of Advanced Computational Science, State University of New York at Stony Brook, Stony Brook, NY 11794, USA
| | - Yuqi Zhu
- Department of Electrical and Computer Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA
| | - Ruiping Zhou
- Department of Electrical and Computer Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA
| | - Cherno Jaye
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20889, USA
| | - Haiqing Liu
- Department of Chemistry, State University of New York at Stony Brook, Stony Brook, NY 11794-3400, USA.
| | - Zhuo-Qun Li
- School of Marine and Atmospheric Sciences, State University of New York at Stony Brook, Stony Brook, NY 11794-5000, USA
| | - Gordon T Taylor
- School of Marine and Atmospheric Sciences, State University of New York at Stony Brook, Stony Brook, NY 11794-5000, USA
| | - Daniel A Fischer
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20889, USA
| | - Joerg Appenzeller
- Department of Electrical and Computer Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA
| | - Robert J Harrison
- Institute of Advanced Computational Science, State University of New York at Stony Brook, Stony Brook, NY 11794, USA and Computational Science Center, Brookhaven National Laboratory, Upton, NY 11973, USA
| | - Stanislaus S Wong
- Department of Chemistry, State University of New York at Stony Brook, Stony Brook, NY 11794-3400, USA. and Condensed Matter Physics and Materials Sciences Division, Brookhaven National Laboratory, Building 480, Upton, NY 11973, USA
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13
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Sreejith S, Hansen R, Joshi H, Kutty RG, Liu Z, Zheng L, Yang J, Zhao Y. Quantum dot decorated aligned carbon nanotube bundles for a performance enhanced photoswitch. NANOSCALE 2016; 8:8547-8552. [PMID: 26695727 DOI: 10.1039/c5nr07494k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Photoactive materials that are triggered by the irradiation of light to generate an electrical response provide an ecofriendly platform to afford efficient power sources and switches. A chemical assembly of well-known elements with aligned carbon nanotube bundles is reported here, which was employed to form an efficient photo-induced charge transfer device. The primary elements of this device are ultra-long multi-walled carbon nanotube (MWCNT) bundles, polyaniline (PANI) thin film coating, and CdSe quantum dots (QDs). Highly ordered and horizontally aligned MWCNT bundles were coated with PANI to enhance charge transfer properties of active QDs in this platform. The obtained device (CdSe-MWCNT@PANI) constructed on a silicon base exhibits highly efficient power conversion capabilities owing to the aligned MWCNT bundle assisted enhanced charge transport pathways generated within the device. The device also shows a short circuit current density (Jsc) of 9.81 mA cm(-2) and an open circuit voltage (Voc) of 0.46 V. The power conversion efficiency (PCE) of the device is 5.41%, and the current response is quite stable, highly responsive, and reproducible.
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Affiliation(s)
- Sivaramapanicker Sreejith
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore.
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14
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Bhande SS, Ambade RB, Shinde DV, Ambade SB, Patil SA, Naushad M, Mane RS, Alothman ZA, Lee SH, Han SH. Improved Photoelectrochemical Cell Performance of Tin Oxide with Functionalized Multiwalled Carbon Nanotubes-Cadmium Selenide Sensitizer. ACS APPLIED MATERIALS & INTERFACES 2015; 7:25094-104. [PMID: 26334564 DOI: 10.1021/acsami.5b05385] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Here we report functionalized multiwalled carbon nanotubes (f-MWCNTs)-CdSe nanocrystals (NCs) as photosensitizer in photoelectrochemical cells, where f-MWCNTs were uniformly coated with CdSe NCs onto SnO2 upright standing nanosheets by using a simple electrodeposition method. The resultant blended photoanodes demonstrate extraordinary electrochemical properties including higher Stern-Volmer constant, higher absorbance, and positive quenching, etc., caused by more accessibility of CdSe NCs compared with pristine SnO2-CdSe photoanode. Atomic and weight percent changes of carbon with f-MWCNTs blending concentrations were confirmed from the energy dispersive X-ray analysis. The morphology images show a uniform coverage of CdSe NCs over f-MWCNTs forming a core-shell type structure as a blend. Compared to pristine CdSe, photoanode with f-MWCNTs demonstrated a 257% increase in overall power conversion efficiency. Obtained results were corroborated by the electrochemical impedance analysis. Higher scattering, more accessibility, and hierarchical structure of SnO2-f-MWCNTs-blend-CdSe NCs photoanode is responsible for higher (a) electron mobility (6.89 × 10(-4) to 10.89 × 10(-4) cm(2) V(-1) S(1-)), (b) diffusion length (27 × 10(-6)),
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Affiliation(s)
- Sambhaji S Bhande
- Center for Nanomaterials and Energy Devices, Swami Ramanand Teerth Marathwada University , Dnyanteerth, Vishnupuri, Nanded 431606, India
| | - Rohan B Ambade
- School of Semiconductor and Chemical Engineering, Chonbuk National University , 664-14, 1-ga Deokjin-dong, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Dipak V Shinde
- Department of Chemistry, Hanyang University , , Seongdong-gu, Haengdang-dong 17, Seoul 133-791, Republic of Korea
| | - Swapnil B Ambade
- School of Semiconductor and Chemical Engineering, Chonbuk National University , 664-14, 1-ga Deokjin-dong, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Supriya A Patil
- Department of Chemistry, Hanyang University , , Seongdong-gu, Haengdang-dong 17, Seoul 133-791, Republic of Korea
| | - Mu Naushad
- Department of Chemistry, College of Science, Bld-5, King Saud University , Riyadh, Saudi Arabia
| | - Rajaram S Mane
- Center for Nanomaterials and Energy Devices, Swami Ramanand Teerth Marathwada University , Dnyanteerth, Vishnupuri, Nanded 431606, India
- Department of Chemistry, Hanyang University , , Seongdong-gu, Haengdang-dong 17, Seoul 133-791, Republic of Korea
| | - Z A Alothman
- Department of Chemistry, College of Science, Bld-5, King Saud University , Riyadh, Saudi Arabia
| | - Soo-Hyoung Lee
- School of Semiconductor and Chemical Engineering, Chonbuk National University , 664-14, 1-ga Deokjin-dong, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Sung-Hwan Han
- Department of Chemistry, Hanyang University , , Seongdong-gu, Haengdang-dong 17, Seoul 133-791, Republic of Korea
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15
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Zou HY, Gao PF, Gao MX, Huang CZ. Polydopamine-embedded Cu2−xSe nanoparticles as a sensitive biosensing platform through the coupling of nanometal surface energy transfer and photo-induced electron transfer. Analyst 2015; 140:4121-9. [DOI: 10.1039/c5an00221d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
This study innovatively highlights the mechanistic details of NSET and PET (NSET©PET) coupling processes, and the disclosed mechanism provides new opportunities for sensitive biosensing applications.
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Affiliation(s)
- Hong Yan Zou
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- College of Pharmaceutical Sciences
- Southwest University
- Chongqing
| | - Peng Fei Gao
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- College of Pharmaceutical Sciences
- Southwest University
- Chongqing
| | - Ming Xuan Gao
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing
- P. R. China
| | - Cheng Zhi Huang
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- College of Pharmaceutical Sciences
- Southwest University
- Chongqing
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16
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Bareket L, Waiskopf N, Rand D, Lubin G, David-Pur M, Ben-Dov J, Roy S, Eleftheriou C, Sernagor E, Cheshnovsky O, Banin U, Hanein Y. Semiconductor nanorod-carbon nanotube biomimetic films for wire-free photostimulation of blind retinas. NANO LETTERS 2014; 14:6685-92. [PMID: 25350365 PMCID: PMC4367200 DOI: 10.1021/nl5034304] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2014] [Revised: 10/25/2014] [Indexed: 05/22/2023]
Abstract
We report the development of a semiconductor nanorod-carbon nanotube based platform for wire-free, light induced retina stimulation. A plasma polymerized acrylic acid midlayer was used to achieve covalent conjugation of semiconductor nanorods directly onto neuro-adhesive, three-dimensional carbon nanotube surfaces. Photocurrent, photovoltage, and fluorescence lifetime measurements validate efficient charge transfer between the nanorods and the carbon nanotube films. Successful stimulation of a light-insensitive chick retina suggests the potential use of this novel platform in future artificial retina applications.
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Affiliation(s)
- Lilach Bareket
- School of Electrical Engineering, Tel Aviv University Center for Nanoscience
and Nanotechnology, and School of Chemistry, Tel
Aviv University, Tel Aviv 69978, Israel
| | - Nir Waiskopf
- Institute of Chemistry and Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - David Rand
- School of Electrical Engineering, Tel Aviv University Center for Nanoscience
and Nanotechnology, and School of Chemistry, Tel
Aviv University, Tel Aviv 69978, Israel
| | - Gur Lubin
- School of Electrical Engineering, Tel Aviv University Center for Nanoscience
and Nanotechnology, and School of Chemistry, Tel
Aviv University, Tel Aviv 69978, Israel
| | - Moshe David-Pur
- School of Electrical Engineering, Tel Aviv University Center for Nanoscience
and Nanotechnology, and School of Chemistry, Tel
Aviv University, Tel Aviv 69978, Israel
| | - Jacob Ben-Dov
- School of Electrical Engineering, Tel Aviv University Center for Nanoscience
and Nanotechnology, and School of Chemistry, Tel
Aviv University, Tel Aviv 69978, Israel
| | - Soumyendu Roy
- School of Electrical Engineering, Tel Aviv University Center for Nanoscience
and Nanotechnology, and School of Chemistry, Tel
Aviv University, Tel Aviv 69978, Israel
| | - Cyril Eleftheriou
- Institute
of Neuroscience, Faculty of Medical Sciences, Newcastle University, Newcastle
upon Tyne, NE2 4HH, United
Kingdom
| | - Evelyne Sernagor
- Institute
of Neuroscience, Faculty of Medical Sciences, Newcastle University, Newcastle
upon Tyne, NE2 4HH, United
Kingdom
| | - Ori Cheshnovsky
- School of Electrical Engineering, Tel Aviv University Center for Nanoscience
and Nanotechnology, and School of Chemistry, Tel
Aviv University, Tel Aviv 69978, Israel
| | - Uri Banin
- Institute of Chemistry and Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Yael Hanein
- School of Electrical Engineering, Tel Aviv University Center for Nanoscience
and Nanotechnology, and School of Chemistry, Tel
Aviv University, Tel Aviv 69978, Israel
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17
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Chen L, Wei J, Zhang C, Du Z, Li H, Zou W. Synthesis of a carbon quantum dots functionalized carbon nanotubes nanocomposite and its application as a solar cell active material. RSC Adv 2014. [DOI: 10.1039/c4ra07292h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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18
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Wang L, Liu H, Konik RM, Misewich JA, Wong SS. Carbon nanotube-based heterostructures for solar energy applications. Chem Soc Rev 2014; 42:8134-56. [PMID: 23843033 DOI: 10.1039/c3cs60088b] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
One means of combining the unique physical and chemical properties of both carbon nanotubes and complementary material motifs (such as metal sulfide quantum dots (QDs), metal oxide nanostructures, and polymers) can be achieved by generating carbon nanotube (CNT)-based heterostructures. These materials can be subsequently utilized as novel and interesting constituent building blocks for the assembly of functional light energy harvesting devices and because of their architectural and functional flexibility, can potentially open up novel means of using and taking advantage of existing renewable energy sources. In this review, we present the reliable and reproducible synthesis of several unique model CNT-based heterostructured systems as well as include an accompanying discussion about the charge transfer and energy flow properties of these materials for their potential incorporation into a range of practical solar energy conversion devices.
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Affiliation(s)
- Lei Wang
- Department of Chemistry, State University of New York at Stony Brook, Stony Brook, NY 11794-3400, USA.
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19
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Han J, Zhuo Y, Chai Y, Yuan R. Dual-responses for electrochemical and electrochemiluminescent detection based on a bifunctional probe. Chem Commun (Camb) 2014; 50:3367-9. [PMID: 24548970 DOI: 10.1039/c3cc49319a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A bifunctional probe (PTC-Tb) which acts as not only a well-defined and stable electrochemical redox molecule but also as a highly efficient co-reactant of an electrochemiluminescent oxygen-peroxydisulfate system was firstly synthesized and applied to the construction of dual-response aptasensors for thrombin detection.
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Affiliation(s)
- Jing Han
- Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
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20
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Mammeri F, Ballarin A, Giraud M, Brusatin G, Ammar S. Photoluminescent properties of new quantum dot nanoparticles/carbon nanotubes hybrid structures. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2013.03.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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21
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Gromova YA, Orlova AO, Maslov VG, Fedorov AV, Baranov AV. Fluorescence energy transfer in quantum dot/azo dye complexes in polymer track membranes. NANOSCALE RESEARCH LETTERS 2013; 8:452. [PMID: 24172215 PMCID: PMC3830447 DOI: 10.1186/1556-276x-8-452] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Accepted: 10/12/2013] [Indexed: 06/01/2023]
Abstract
Fluorescence resonance energy transfer in complexes of semiconductor CdSe/ZnS quantum dots with molecules of heterocyclic azo dyes, 1-(2-pyridylazo)-2-naphthol and 4-(2-pyridylazo) resorcinol, formed at high quantum dot concentration in the polymer pore track membranes were studied by steady-state and transient PL spectroscopy. The effect of interaction between the complexes and free quantum dots on the efficiency of the fluorescence energy transfer and quantum dot luminescence quenching was found and discussed.
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Affiliation(s)
- Yulia A Gromova
- Saint Petersburg National Research University of Information Technologies, Mechanics and Optics, Kronverkskiy pr, Saint Petersburg 197101, Russia
| | - Anna O Orlova
- Saint Petersburg National Research University of Information Technologies, Mechanics and Optics, Kronverkskiy pr, Saint Petersburg 197101, Russia
| | - Vladimir G Maslov
- Saint Petersburg National Research University of Information Technologies, Mechanics and Optics, Kronverkskiy pr, Saint Petersburg 197101, Russia
| | - Anatoly V Fedorov
- Saint Petersburg National Research University of Information Technologies, Mechanics and Optics, Kronverkskiy pr, Saint Petersburg 197101, Russia
| | - Alexander V Baranov
- Saint Petersburg National Research University of Information Technologies, Mechanics and Optics, Kronverkskiy pr, Saint Petersburg 197101, Russia
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22
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Stewart MH, Huston AL, Scott AM, Oh E, Algar WR, Deschamps JR, Susumu K, Jain V, Prasuhn DE, Blanco-Canosa J, Dawson PE, Medintz IL. Competition between Förster resonance energy transfer and electron transfer in stoichiometrically assembled semiconductor quantum dot-fullerene conjugates. ACS NANO 2013; 7:9489-505. [PMID: 24128175 DOI: 10.1021/nn403872x] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Understanding how semiconductor quantum dots (QDs) engage in photoinduced energy transfer with carbon allotropes is necessary for enhanced performance in solar cells and other optoelectronic devices along with the potential to create new types of (bio)sensors. Here, we systematically investigate energy transfer interactions between C60 fullerenes and four different QDs, composed of CdSe/ZnS (type I) and CdSe/CdS/ZnS (quasi type II), with emission maxima ranging from 530 to 630 nm. C60-pyrrolidine tris-acid was first coupled to the N-terminus of a hexahistidine-terminated peptide via carbodiimide chemistry to yield a C60-labeled peptide (pepC60). This peptide provided the critical means to achieve ratiometric self-assembly of the QD-(pepC60) nanoheterostructures by exploiting metal affinity coordination to the QD surface. Controlled QD-(pepC60)N bioconjugates were prepared by discretely increasing the ratio (N) of pepC60 assembled per QD in mixtures of dimethyl sulfoxide and buffer; this mixed organic/aqueous approach helped alleviate issues of C60 solubility. An extensive set of control experiments were initially performed to verify the specific and ratiometric nature of QD-(pepC60)N assembly. Photoinitiated energy transfer in these hybrid organic-inorganic systems was then interrogated using steady-state and time-resolved fluorescence along with ultrafast transient absorption spectroscopy. Coordination of pepC60 to the QD results in QD PL quenching that directly tracks with the number of peptides displayed around the QD. A detailed photophysical analysis suggests a competition between electron transfer and Förster resonance energy transfer from the QD to the C60 that is dependent upon a complex interplay of pepC60 ratio per QD, the presence of underlying spectral overlap, and contributions from QD size. These results highlight several important factors that must be considered when designing QD-donor/C60-acceptor systems for potential optoelectronic and biosensing applications.
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Affiliation(s)
- Michael H Stewart
- Optical Sciences Division, Code 5611, ‡Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory , Washington, DC 20375, United States
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23
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Yuan Y, Yuan R, Chai Y, Zhuo Y, Gan X, Bai L. 3,4,9,10-perylenetetracarboxylic acid/hemin nanocomposites act as redox probes and electrocatalysts for constructing a pseudobienzyme-channeling amplified electrochemical aptasensor. Chemistry 2012; 18:14186-91. [PMID: 23001991 DOI: 10.1002/chem.201103960] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2011] [Revised: 07/18/2012] [Indexed: 12/28/2022]
Abstract
A simple wet-chemical strategy for the synthesis of 3,4,9,10-perylenetetracarboxylic acid (PTCA)/hemin nanocomposites through π-π interactions is demonstrated. Significantly, the hemin successfully conciliates PTCA redox activity with a pair of well-defined redox peaks and intrinsic peroxidase-like activity, which provides potential application of the PTCA self-derived redox activity as redox probes. Additionally, PTCA/hemin nanocomposites exhibit a good membrane-forming property, which not only avoids the conventional fussy process for redox probe immobilization, but also reduces the participation of the membrane materials that act as a barrier of electron transfer. On the basis of these unique properties, a pseudobienzyme-channeling amplified electrochemical aptasensor is developed that is coupled with glucose oxidase (GOx) for thrombin detection by using PTCA/hemin nanocomposites as redox probes and electrocatalysts. With the addition of glucose to the electrolytic cell, the GOx on the aptasensor surface bioelectrocatalyzed the reduction of glucose to produce H(2)O(2), which in turn was electrocatalyzed by the PTCA/hemin nanocomposites. Cascade schemes, in which an enzyme is catalytically linked to another enzyme, can produce signal amplification and therefore increase the biosensor sensitivity. As a result, a linear relationship for thrombin from 0.005 to 20 nM and a detection limit of 0.001 nM were obtained.
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Affiliation(s)
- Yali Yuan
- Key Laboratory on Luminescence and Real-Time Analysis, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing, PR China
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24
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Shi Z, Liu C, Lv W, Shen H, Wang D, Chen L, Li LS, Jin J. Free-standing single-walled carbon nanotube-CdSe quantum dots hybrid ultrathin films for flexible optoelectronic conversion devices. NANOSCALE 2012; 4:4515-4521. [PMID: 22695781 DOI: 10.1039/c2nr30920c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In this work, we described a facile route for the fabrication of free-standing single-walled carbon nanotubes (SWCNT)-CdSe quantum dots (QDs) hybrid ultrathin films and investigated their optoelectronic conversion properties. A free-standing SWCNT film with thickness of ∼36 nm was firstly prepared via vacuum filtration. The film was then immersed into the pre-synthesized oleic acid-capped CdSe QDs (average diameter of 3.5 nm) solution, where CdSe QDs anchored spontaneously onto the surface of SWCNT film to produce SWCNT-CdSe QDs hybrid film. By using pure SWCNT films in different thicknesses as bottom and top electrodes, a flexible all-carbon electrode optoelectronic conversion device with sandwich structure of SWCNT film (thickness of ∼200 nm)/SWCNT-CdSe QDs hybrid film (thickness of ∼36 nm)/SWCNT film (thickness of ∼36 nm) was constructed to generate optoelectronic conversion under illumination of solar-simulated light. Our results demonstrated that the all-carbon electrode structure was effective for charge separation and a sensitive and stable photocurrent signal could be produced in such a device. In addition, our SWCNT-CdSe QDs hybrid film exhibited high flexibility and durability. No clear change in the resistance of the film was detected under bending in various bending angles.
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Affiliation(s)
- Zhun Shi
- i-LAB, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, Jiangsu 215123, P. R. China
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25
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Vercelli B, Zotti G, Berlin A. Alternate monolayers of CdSe nanocrystals and perylene tetracarboxylate: quantum dot hypersensitization for dye-sensitized solar cells. ACS APPLIED MATERIALS & INTERFACES 2012; 4:3233-3238. [PMID: 22663252 DOI: 10.1021/am300590a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Mono- and multilayers from CdSe nanocrystal dispersion and perylene tetracarboxylate solution are reported for the first time. The layers were investigated by UV-visible spectroscopy, cyclic voltammetry, photoconductivity, and photoelectrochemical techniques. The n-type organic semiconductor gives enhanced photoconductivity to the CdSe-NC multilayer structure. The photoactive perylene monolayer acts also as hypersensitizer of CdSe-NC structures. The perylene-modified CdSe-NC monolayer on indium tin oxide (ITO) electrode in a three-electrode photoelectrochemical cell upon illumination in the presence of oxygen generates an intense steady photocurrent as high as 10-20 times that expected from the individual contributions of perylene and CdSe-NCs. The hypersensitization mechanism is discussed on the basis of the energy level diagram of the components.
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Affiliation(s)
- B Vercelli
- Istituto CNR per l' Energetica e le Interfasi , C.o Stati Uniti 4, 35127 Padova, Italy
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26
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Stewart MH, Huston AL, Scott AM, Efros AL, Melinger JS, Gemmill KB, Trammell SA, Blanco-Canosa JB, Dawson PE, Medintz IL. Complex Förster energy transfer interactions between semiconductor quantum dots and a redox-active osmium assembly. ACS NANO 2012; 6:5330-5347. [PMID: 22671940 DOI: 10.1021/nn301177h] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The ability of luminescent semiconductor quantum dots (QDs) to engage in diverse energy transfer processes with organic dyes, light-harvesting proteins, metal complexes, and redox-active labels continues to stimulate interest in developing them for biosensing and light-harvesting applications. Within biosensing configurations, changes in the rate of energy transfer between the QD and the proximal donor, or acceptor, based upon some external (biological) event form the principle basis for signal transduction. However, designing QD sensors to function optimally is predicated on a full understanding of all relevant energy transfer mechanisms. In this report, we examine energy transfer between a range of CdSe-ZnS core-shell QDs and a redox-active osmium(II) polypyridyl complex. To facilitate this, the Os complex was synthesized as a reactive isothiocyanate and used to label a hexahistidine-terminated peptide. The Os-labeled peptide was ratiometrically self-assembled to the QDs via metal affinity coordination, bringing the Os complex into close proximity of the nanocrystal surface. QDs displaying different emission maxima were assembled with increasing ratios of Os-peptide complex and subjected to detailed steady-state, ultrafast transient absorption, and luminescence lifetime decay analyses. Although the possibility exists for charge transfer quenching interactions, we find that the QD donors engage in relatively efficient Förster resonance energy transfer with the Os complex acceptor despite relatively low overall spectral overlap. These results are in contrast to other similar QD donor-redox-active acceptor systems with similar separation distances, but displaying far higher spectral overlap, where charge transfer processes were reported to be the dominant QD quenching mechanism.
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Affiliation(s)
- Michael H Stewart
- Optical Sciences Division, Code 5611, U.S. Naval Research Laboratory, Washington, DC 20375, USA.
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27
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Yuan CT, Wang YG, Huang KY, Chen TY, Yu P, Tang J, Sitt A, Banin U, Millo O. Single-particle studies of band alignment effects on electron transfer dynamics from semiconductor hetero-nanostructures to single-walled carbon nanotubes. ACS NANO 2012; 6:176-182. [PMID: 22136306 DOI: 10.1021/nn2036957] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We utilize single-molecule spectroscopy combined with time-correlated single-photon counting to probe the electron transfer (ET) rates from various types of semiconductor hetero-nanocrystals, having either type-I or type-II band alignment, to single-walled carbon nanotubes. A significantly larger ET rate was observed for type-II ZnSe/CdS dot-in-rod nanostructures as compared to type-I spherical CdSe/ZnS core/shell quantum dots and to CdSe/CdS dot-in-rod structures. Furthermore, such rapid ET dynamics can compete with both Auger and radiative recombination processes, with significance for effective photovoltaic operation.
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Affiliation(s)
- Chi-Tsu Yuan
- Research Center for Applied Sciences, Academia Sinica, 128 Academia Road, Taipei 115-29, Taiwan
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28
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Suzuki S, Kozaki M, Nozaki K, Okada K. Recent progress in controlling photophysical processes of donor–acceptor arrays involving perylene diimides and boron-dipyrromethenes. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2011. [DOI: 10.1016/j.jphotochemrev.2011.10.001] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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29
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Orlova AO, Gromova YA, Savelyeva AV, Maslov VG, Artemyev MV, Prudnikau A, Fedorov AV, Baranov AV. Track membranes with embedded semiconductor nanocrystals: structural and optical examinations. NANOTECHNOLOGY 2011; 22:455201. [PMID: 21993251 DOI: 10.1088/0957-4484/22/45/455201] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We studied the optical properties of poly(ethylene terephthalate) ion track membranes of 1.5, 0.5 and 0.05 µm pores impregnated with luminescent semiconductor CdSe/ZnS nanocrystals of different diameters (2.5 and 5 nm). The nanocrystals were embedded from their colloidal solutions in toluene by the immersion of a membrane in a colloidal solution. Localization of quasi-isolated weakly interacting CdSe/ZnS nanocrystals in a loosened layer on the track pore wall surface along with the existence of empty pores was demonstrated. We observed also the spatial separation of nanocrystals of 2.5 and 5 nm in size along the 50 nm pores.
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Affiliation(s)
- A O Orlova
- State University of Informational Technologies, Mechanics and Optics, 197101 St-Petersburg, Russia.
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30
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Li X, Qin Y, Picraux ST, Guo ZX. Noncovalent assembly of carbon nanotube-inorganic hybrids. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm10516g] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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