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Anbu P, Rethinasabapathy M, Sathiyaseelan A, Zhang X, Wang MH, Vijayakumar S, Huh YS. Gelatin-Coated TiO 2/Pd Hybrid: A Potentially Useful Nanomaterial to Enhance Antibacterial and Anticancer Properties. Int J Mol Sci 2024; 25:5308. [PMID: 38791348 PMCID: PMC11121089 DOI: 10.3390/ijms25105308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 05/05/2024] [Accepted: 05/08/2024] [Indexed: 05/26/2024] Open
Abstract
Hybrid nanomaterials have attracted considerable interest in biomedicine because of their fascinating characteristics and wide range of applications in targeted drug delivery, antibacterial activity, and cancer treatment. This study developed a gelatin-coated Titanium oxide/palladium (TiO2/Pd) hybrid nanomaterial to enhance the antibacterial and anticancer capabilities. Morphological and structural analyses were conducted to characterize the synthesized hybrid nanomaterial. The surface texture of the hybrid nanomaterials was examined by high-resolution transmission electron microscopy (HR-TEM) and field-emission scanning electron microscopy (FE-SEM). The FE-SEM image revealed the bulk of the spherically shaped particles and the aggregated tiny granules. Energy dispersive X-ray spectroscopy (EDS) revealed Ti, Pd, C, and O. X-ray diffraction (XRD) revealed the gelatin-coated TiO2/Pd to be in the anatase form. Fourier transform infrared spectroscopy examined the interactions among the gelatin-coated TiO2/Pd nanoparticles. The gelatin-coated TiO2/Pd nanomaterials exhibited high antibacterial activity against Escherichia coli (22 mm) and Bacillus subtilis (17 mm) compared to individual nanoparticles, confirming the synergistic effect. More importantly, the gelatin-coated TiO2/Pd hybrid nanomaterial exhibited remarkable cytotoxic effects on A549 lung cancer cells which shows a linear increase with the concentration of the nanomaterial. The hybrid nanomaterials displayed higher toxicity to cancer cells than the nanoparticles alone. Furthermore, the cytotoxic activity against human cancer cells was verified by the generation of reactive oxygen species and nuclear damage. Therefore, gelatin-coated TiO2/Pd nanomaterials have potential uses in treating cancer and bacterial infections.
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Affiliation(s)
- Periasamy Anbu
- Department of Biological Engineering, Inha University, Incheon 22212, Republic of Korea
| | - Muruganantham Rethinasabapathy
- NanoBio High-Tech Materials Research Center, Department of Biological Sciences and Bioengineering, Inha University, 100 Inha-ro, Incheon 22212, Republic of Korea;
| | - Anbazhagan Sathiyaseelan
- Department of Medical Biotechnology, College of Biomedical Sciences, Kangwon National University, Chuncheon-si 24341, Republic of Korea; (A.S.)
| | - Xin Zhang
- Department of Medical Biotechnology, College of Biomedical Sciences, Kangwon National University, Chuncheon-si 24341, Republic of Korea; (A.S.)
| | - Myeong-Hyeon Wang
- Department of Medical Biotechnology, College of Biomedical Sciences, Kangwon National University, Chuncheon-si 24341, Republic of Korea; (A.S.)
| | | | - Yun Suk Huh
- NanoBio High-Tech Materials Research Center, Department of Biological Sciences and Bioengineering, Inha University, 100 Inha-ro, Incheon 22212, Republic of Korea;
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2
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Cobongela SZZ, Makatini MM, May B, Njengele-Tetyana Z, Bambo MF, Sibuyi NRS. Antibacterial Activity and Cytotoxicity Screening of Acyldepsipeptide-1 Analogues Conjugated to Silver/Indium/Sulphide Quantum Dots. Antibiotics (Basel) 2024; 13:183. [PMID: 38391569 PMCID: PMC10886425 DOI: 10.3390/antibiotics13020183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 01/30/2024] [Accepted: 02/09/2024] [Indexed: 02/24/2024] Open
Abstract
The continuous rise in bacterial infections and antibiotic resistance is the driving force behind the search for new antibacterial agents with novel modes of action. Antimicrobial peptides (AMPs) have recently gained attention as promising antibiotic agents with the potential to treat drug-resistant infections. Several AMPs have shown a lower propensity towards developing resistance compared to conventional antibiotics. However, these peptides, especially acyldepsipeptides (ADEPs) present with unfavorable pharmacokinetic properties, such as high toxicity and low bioavailability. Different ways to improve these peptides to be drug-like molecules have been explored, and these include using biocompatible nano-carriers. ADEP1 analogues (SC005-8) conjugated to gelatin-capped Silver/Indium/Sulfide (AgInS2) quantum dots (QDs) improved the antibacterial activity against Gram-negative (Escherichia coli and Pseudomonas aeruginosa), and Gram-positive (Bacillus subtilis, Staphylococcus aureus and Methicillin-resistant Staphylococcus aureus) bacteria. The ADEP1 analogues exhibited minimum inhibition concentrations (MIC) between 63 and 500 µM, and minimum bactericidal concentrations (MBC) values between 125 and 750 µM. The AgInS2-ADEP1 analogue conjugates showed enhanced antibacterial activity as evident from the MIC and MBC values, i.e., 1.6-25 µM and 6.3-100 µM, respectively. The AgInS2-ADEP1 analogue conjugates were non-toxic against HEK-293 cells at concentrations that showed antibacterial activity. The findings reported herein could be helpful in the development of antibacterial treatment strategies.
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Affiliation(s)
- Sinazo Z Z Cobongela
- Health Platform, Advanced Materials Division, Mintek, Randburg 2194, South Africa
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg 2050, South Africa
- Department of Science and Innovation (DSI)/Mintek Nanotechnology Innovation Centre (NIC), Advanced Materials Division, Mintek, Randburg 2194, South Africa
| | - Maya M Makatini
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg 2050, South Africa
| | - Bambesiwe May
- Department of Science and Innovation (DSI)/Mintek Nanotechnology Innovation Centre (NIC), Advanced Materials Division, Mintek, Randburg 2194, South Africa
- Institute for Nanotechnology and Water Sustainability (iNanoWS), College of Science, Engineering and Technology, University of South Africa, Florida Campus, Roodepoort 1705, South Africa
| | - Zikhona Njengele-Tetyana
- Health Platform, Advanced Materials Division, Mintek, Randburg 2194, South Africa
- Wits RHI, University of the Witwatersrand, Johannesburg 2050, South Africa
| | - Mokae F Bambo
- Department of Science and Innovation (DSI)/Mintek Nanotechnology Innovation Centre (NIC), Advanced Materials Division, Mintek, Randburg 2194, South Africa
| | - Nicole R S Sibuyi
- Health Platform, Advanced Materials Division, Mintek, Randburg 2194, South Africa
- Department of Science and Innovation (DSI)/Mintek Nanotechnology Innovation Centre (NIC), Advanced Materials Division, Mintek, Randburg 2194, South Africa
- Department of Science and Innovation (DSI)/Mintek Nanotechnology Innovation Centre (NIC), Biolabels Research Node, Department of Biotechnology, University of the Western Cape, Bellville 7535, South Africa
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3
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Tozawa M, Miyamae C, Akiyoshi K, Kameyama T, Yamamoto T, Motomura G, Fujisaki Y, Uematsu T, Kuwabata S, Torimoto T. One-pot synthesis of Ag-In-Ga-S nanocrystals embedded in a Ga 2O 3 matrix and enhancement of band-edge emission by Na + doping. NANOSCALE ADVANCES 2023; 5:7057-7066. [PMID: 38059040 PMCID: PMC10696949 DOI: 10.1039/d3na00755c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 11/13/2023] [Indexed: 12/08/2023]
Abstract
I-III-VI-based semiconductor quantum dots (QDs) have been intensively explored because of their unique controllable optoelectronic properties. Here we report one-pot synthesis of Na-doped Ag-In-Ga-S (AIGS) QDs incorporated in a Ga2O3 matrix. The obtained QDs showed a sharp band-edge photoluminescence peak at 557 nm without a broad-defect site emission. The PL quantum yield (QY) of such QDs was 58%, being much higher than that of AIGS QDs without Na+ doping, 29%. The obtained Na-doped AIGS/Ga2O3 composite particles were used as an emitting layer of green QD light-emitted diodes. A sharp electroluminescence (EL) peak was observed at 563 nm, being similar to that in the PL spectrum of the QDs used. The external quantum efficiency of the device was 0.6%.
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Affiliation(s)
- Makoto Tozawa
- Graduate School of Engineering, Nagoya University Chikusa-ku Nagoya 464-8603 Japan
| | - Chie Miyamae
- Graduate School of Engineering, Nagoya University Chikusa-ku Nagoya 464-8603 Japan
| | - Kazutaka Akiyoshi
- Graduate School of Engineering, Nagoya University Chikusa-ku Nagoya 464-8603 Japan
| | - Tatsuya Kameyama
- Graduate School of Engineering, Nagoya University Chikusa-ku Nagoya 464-8603 Japan
| | - Takahisa Yamamoto
- Graduate School of Engineering, Nagoya University Chikusa-ku Nagoya 464-8603 Japan
| | - Genichi Motomura
- Science & Technology Research Laboratories, Japan Broadcasting Corporation (NHK) 1-10-11 Kinuta, Setagaya-ku Tokyo 157-8510 Japan
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University Suita Osaka 565-0871 Japan
| | - Yoshihide Fujisaki
- Science & Technology Research Laboratories, Japan Broadcasting Corporation (NHK) 1-10-11 Kinuta, Setagaya-ku Tokyo 157-8510 Japan
| | - Taro Uematsu
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University Suita Osaka 565-0871 Japan
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University Suita Osaka 565-0871 Japan
| | - Susumu Kuwabata
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University Suita Osaka 565-0871 Japan
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University Suita Osaka 565-0871 Japan
| | - Tsukasa Torimoto
- Graduate School of Engineering, Nagoya University Chikusa-ku Nagoya 464-8603 Japan
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Qin Z, Chen Y, Chen T, Liang M, Wen P, Guo C, Ye C, Xie Z. Improved Luminous Efficiency of AgInS 2 Quantum Dots and Zeolitic Imidazolate Framework-70 Composite for White Light Emitting Diode Applications. Chemistry 2023; 29:e202301123. [PMID: 37267271 DOI: 10.1002/chem.202301123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 05/30/2023] [Accepted: 05/31/2023] [Indexed: 06/04/2023]
Abstract
The application of multiple quantum dots (QDs) in the field of white light emitting diodes (WLEDs) is still an important challenge due to their low luminous efficiency and quenching phenomenon. In this paper, we prepared AgInS2 QDs/zeolitic imidazolate framework-70 (AIS/ZIF-70) composite by a microwave hydrothermal method. Owing to the high porosity and stability of ZIF-70, it could effectively prevent quenching issues due to the aggregation of QDs. Since the ZIF-70 and QDs were chemically bonded, the formation of the ZnS layer could effectively passivate the surface defect and thus the quantum yield reached 21.49 % in aqueous solution. The luminous efficiency (LE) of the assembled AIS/ZIF-based WLED was reinforced by 6.8 times with a molar ratio of AgIn/Zn=18, i. e. at 5.26 % molar fraction of ZIF-70. Moreover, the color rendering index (CRI) and correlated color temperature (CCT) of AIS/ZIF-based WLED were 84.3 and 3631 K, respectively, indicating its potential application in solid-state lighting.
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Affiliation(s)
- Zhe Qin
- Institute of Materials Science & Devices, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Yuanhong Chen
- Institute of Materials Science & Devices, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Ting Chen
- Institute of Materials Science & Devices, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Mengbiao Liang
- Institute of Materials Science & Devices, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Peng Wen
- Institute of Materials Science & Devices, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Chunxian Guo
- Institute of Materials Science & Devices, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Changqing Ye
- Institute of Materials Science & Devices, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Zhixiang Xie
- School of Chemistry and Life Sciences, Suzhou University of Science and Technology, Suzhou, 215009, China
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5
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Chen T, Chen Y, Li Y, Liang M, Wu W, Wang Y. A Review on Multiple I-III-VI Quantum Dots: Preparation and Enhanced Luminescence Properties. MATERIALS (BASEL, SWITZERLAND) 2023; 16:5039. [PMID: 37512312 PMCID: PMC10384050 DOI: 10.3390/ma16145039] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/07/2023] [Accepted: 07/12/2023] [Indexed: 07/30/2023]
Abstract
I-III-VI type QDs have unique optoelectronic properties such as low toxicity, tunable bandgaps, large Stokes shifts and a long photoluminescence lifetime, and their emission range can be continuously tuned in the visible to near-infrared light region by changing their chemical composition. Moreover, they can avoid the use of heavy metal elements such as Cd, Hg and Pb and highly toxic anions, i.e., Se, Te, P and As. These advantages make them promising candidates to replace traditional binary QDs in applications such as light-emitting diodes, solar cells, photodetectors, bioimaging fields, etc. Compared with binary QDs, multiple QDs contain many different types of metal ions. Therefore, the problem of different reaction rates between the metal ions arises, causing more defects inside the crystal and poor fluorescence properties of QDs, which can be effectively improved by doping metal ions (Zn2+, Mn2+ and Cu+) or surface coating. In this review, the luminous mechanism of I-III-VI type QDs based on their structure and composition is introduced. Meanwhile, we focus on the various synthesis methods and improvement strategies like metal ion doping and surface coating from recent years. The primary applications in the field of optoelectronics are also summarized. Finally, a perspective on the challenges and future perspectives of I-III-VI type QDs is proposed as well.
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Affiliation(s)
- Ting Chen
- Institute of Materials Science & Devices, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Yuanhong Chen
- Institute of Materials Science & Devices, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Youpeng Li
- Institute of Materials Science & Devices, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Mengbiao Liang
- Institute of Materials Science & Devices, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Wenkui Wu
- Institute of Materials Science & Devices, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Yude Wang
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650504, China
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6
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Xie X, Zhao J, Lin O, Yin Z, Li X, Zhang Y, Tang A. Narrow-Bandwidth Blue-Emitting Ag-Ga-Zn-S Semiconductor Nanocrystals for Quantum-Dot Light-Emitting Diodes. J Phys Chem Lett 2022; 13:11857-11863. [PMID: 36520488 DOI: 10.1021/acs.jpclett.2c03437] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
I-III-VI type semiconductor nanocrystals (NCs) have attracted considerable attention in the display field. Herein, we realized the synthesis of narrow-bandwidth blue-emitting Ag-Ga-Zn-S (AGZS) NCs via a facile one-pot method. Intriguingly, the Ag/Zn feeding ratio and Ag/Ga feeding ratio are crucial for the realization of narrow-bandwidth AGZS NCs. By choosing a Ag/Zn feeding ratio of 4:1 and Ag/Ga feeding ratio of 1:8, AGZS NCs demonstrate a typical blue emission at 470 nm with a narrow full width at half-maximum (fwhm) of 48 nm, which is mainly generated from the band-to-hole recombination rather than the donor-acceptor pair (DAP) recombination. Furthermore, a solution-processed quantum-dot light-emitting device based on AGZS NCs exhibits a narrow electroluminescent bandwidth of 53 nm and high luminance over 123.1 cd m-2, as well as a high external quantum efficiency (EQE) of 0.40%. Our work highlights AGZS NCs with high color purity as an important candidate for blue-light-emitting devices.
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Affiliation(s)
- Xiulin Xie
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Physical Science and Engineering, Beijing Jiaotong University, Beijing100044, China
| | - Jinxing Zhao
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Physical Science and Engineering, Beijing Jiaotong University, Beijing100044, China
| | - Ouyang Lin
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Physical Science and Engineering, Beijing Jiaotong University, Beijing100044, China
| | - Zhe Yin
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Physical Science and Engineering, Beijing Jiaotong University, Beijing100044, China
| | - Xu Li
- Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding071002, China
| | - Yu Zhang
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Physical Science and Engineering, Beijing Jiaotong University, Beijing100044, China
| | - Aiwei Tang
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Physical Science and Engineering, Beijing Jiaotong University, Beijing100044, China
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7
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Hoisang W, Uematsu T, Torimoto T, Kuwabata S. Surface ligand chemistry on quaternary Ag(In x Ga 1-x )S 2 semiconductor quantum dots for improving photoluminescence properties. NANOSCALE ADVANCES 2022; 4:849-857. [PMID: 36131838 PMCID: PMC9419514 DOI: 10.1039/d1na00684c] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 12/08/2021] [Indexed: 06/15/2023]
Abstract
Ternary and quaternary semiconductor quantum dots (QDs) are candidates for cadmium-free alternatives. Among these, semiconductors containing elements from groups 11, 13, and 16 (i.e., I-III-VI2) are attracting increasing attention since they are direct semiconductors whose bandgap energies in the bulk state are tunable between visible and near infrared. The quaternary system of alloys consisting of silver indium sulfide (AgInS2; bandgap energy: E g = 1.8 eV) and silver gallium sulfide (AgGaS2; E g = 2.4 eV) (i.e., Ag[In x Ga1-x ]S2 (AIGS)) enables bandgap tuning over a wide range of visible light. However, the photoluminescence (PL) quantum yield (10-20%) of AIGS QDs is significantly lower than that of AgInS2 (60-70%). The present study investigates how to improve the PL quantum yield of AIGS QDs via surface ligand engineering. Firstly, the use of a mixture of oleic acid and oleylamine, instead of only oleylamine, as the solvent for the QD synthesis was attempted, and a threefold improvement of the PL quantum yield was achieved. Subsequently, a post-synthetic ligand exchange was performed. Although the addition of alkylphosphine, which is known as an L-type ligand, improved the PL efficiency only by 20%, the use of metal halides, which are categorized as Z-type ligands, demonstrated a twofold to threefold improvement of the PL quantum yield, with the highest value reaching 73.4%. The same procedure was applied to the band-edge emitting core/shell-like QDs that were synthesized in one batch based on our previous findings. While the as-prepared core/shell-like QDs exhibited a PL quantum yield of only 9%, the PL quantum yield increased to 49.5% after treatment with metal halides.
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Affiliation(s)
- Watcharaporn Hoisang
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University 2-1 Yamada-oka Suita Osaka 565-0871 Japan
| | - Taro Uematsu
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University 2-1 Yamada-oka Suita Osaka 565-0871 Japan
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University 2-1 Yamada-oka Suita Osaka 565-0871 Japan
| | - Tsukasa Torimoto
- Department of Materials Chemistry, Graduate School of Engineering, Nagoya University Chikusa-ku Nagoya 464-8603 Japan
| | - Susumu Kuwabata
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University 2-1 Yamada-oka Suita Osaka 565-0871 Japan
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University 2-1 Yamada-oka Suita Osaka 565-0871 Japan
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8
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Zikalala N, Parani S, Oluwafemi OS. Facile aqueous synthesis of ZnInS quantum dots and its application for selective detection of Co 2+Ions. NANOTECHNOLOGY 2021; 32:295503. [PMID: 33761493 DOI: 10.1088/1361-6528/abf193] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2020] [Accepted: 03/23/2021] [Indexed: 06/12/2023]
Abstract
The synthesis of ZnInS (ZIS) quantum dots (QDs) in aqueous medium using thioglycolic acid (TGA) and sodium citrate as dual capping agents has been reported. The as-synthesized ZIS QDs were water soluble, emitting at 512 nm and nearly spherical in shape with average particle size of 8.9 ± 1.4 nm. The as-synthesized ZIS QDs were tested for its fluorescence response against different metal ions and the results revealed that ZIS QDs were selectively quenched by Co2+ions compared to other ions. The fluorescence sensing experiment showed that ZIS QDs has a linear response against the concentration of Co2+ions (0.1-100μM ) with the detection limit of 0.099μM. Based on the transmission electron microscope and absorption spectroscopy analyzes, the fluorescence quenching is attributed to the formation of surface ligand-metal complex (TGA-Co2+ions) which caused aggregation of the QDs. The present method explores the synthesis of zero-dimentional ZIS QDs and its potential in the selective detection of Co2+ions in aqueous solution.
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Affiliation(s)
- Nkosingiphile Zikalala
- Department of Chemical Sciences (formerly Applied Chemistry), University of Johannesburg, PO Box 17011, Doornfontein 2028, Johannesburg, South Africa
- Centre for Nanomaterials Science Research, University of Johannesburg, PO Box 17011, Doornfontein 2028, Johannesburg, South Africa
| | - Sundararajan Parani
- Department of Chemical Sciences (formerly Applied Chemistry), University of Johannesburg, PO Box 17011, Doornfontein 2028, Johannesburg, South Africa
- Centre for Nanomaterials Science Research, University of Johannesburg, PO Box 17011, Doornfontein 2028, Johannesburg, South Africa
| | - Oluwatobi Samuel Oluwafemi
- Department of Chemical Sciences (formerly Applied Chemistry), University of Johannesburg, PO Box 17011, Doornfontein 2028, Johannesburg, South Africa
- Centre for Nanomaterials Science Research, University of Johannesburg, PO Box 17011, Doornfontein 2028, Johannesburg, South Africa
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9
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Zhang J, Zeng B, Ye H, Tang A. Facile synthesis of ternary AgInS2 nanowires and their self-assembly of fingerprint-like nanostructures. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.09.050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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10
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Chen Y, Hu Q, Wang Q, Yu M, Gong X, Li S, Xiao J, Guo Y, Chen G, Lai X. Flexible translucent chitosan-glycerin/QD nanocomposite glue for anti-counterfeiting films with strong adhesion and stability. RSC Adv 2020; 10:23410-23416. [PMID: 35520298 PMCID: PMC9055136 DOI: 10.1039/d0ra02718a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 06/08/2020] [Indexed: 01/20/2023] Open
Abstract
With the rapid development of commodity circulation, more attention has been paid to the anticounterfeiting technology of commodities, including stability, universality and ease of distinguishing. The authors report the use of gelatin-chitosan-glycerin/QD nanocomposite-functionalized glue for luminescent anti-counterfeiting labels. As the blend and plasticizer, the addition of chitosan and glycerin effectively improved the flexibility and formability of the gelatin-chitosan-glycerin/QD composite films, which show excellent mechanical properties, including high transparency, luminescence and flexibility, and they are easy to prepare on a large scale, providing certain reference values for new anticounterfeiting technology applying a variety of morphologies.
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Affiliation(s)
- Yanyan Chen
- School of Chemistry and Chemical Engineering, Hefei University of Technology Hefei Anhui 230009 People's Republic of China
| | - Qi Hu
- School of Chemistry and Chemical Engineering, Hefei University of Technology Hefei Anhui 230009 People's Republic of China
| | - Qiang Wang
- School of Chemistry and Chemical Engineering, Hefei University of Technology Hefei Anhui 230009 People's Republic of China
| | - Minghui Yu
- School of Chemistry and Chemical Engineering, Hefei University of Technology Hefei Anhui 230009 People's Republic of China
| | - Xiaoyu Gong
- School of Chemistry and Chemical Engineering, Hefei University of Technology Hefei Anhui 230009 People's Republic of China
| | - Shenjie Li
- School of Chemistry and Chemical Engineering, Hefei University of Technology Hefei Anhui 230009 People's Republic of China
| | - Jin Xiao
- School of Chemistry and Chemical Engineering, Hefei University of Technology Hefei Anhui 230009 People's Republic of China
| | - Yingjie Guo
- School of Chemistry and Chemical Engineering, Hefei University of Technology Hefei Anhui 230009 People's Republic of China
| | - Guangyu Chen
- School of Chemistry and Chemical Engineering, Hefei University of Technology Hefei Anhui 230009 People's Republic of China
| | - Xinyu Lai
- School of Chemistry and Chemical Engineering, Hefei University of Technology Hefei Anhui 230009 People's Republic of China
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11
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Huang X, Tong X, Wang Z. Rational design of colloidal core/shell quantum dots for optoelectronic applications. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.jnlest.2020.100018] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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12
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Li S, Zha T, Gong X, Hu Q, Yu M, Wu J, Li R, Wang J, Chen Y. Cu–Cd–Zn–S/ZnS core/shell quantum dot/polyvinyl alcohol flexible films for white light-emitting diodes. RSC Adv 2020; 10:24425-24433. [PMID: 35516201 PMCID: PMC9055132 DOI: 10.1039/d0ra03540h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 06/10/2020] [Indexed: 01/30/2023] Open
Abstract
We present a facile route for the synthesis of water-soluble Cu–Cd–Zn–S/ZnS core/shell quantum dots (QDs) by simple pH regulation. The PL spectra of Cu–Cd–Zn–S/ZnS core/shell quantum dots can cover the whole visible light region in the case of only two ratios of Cu/Cd/Zn. The emission wavelength of Cu–Cd–Zn–S/ZnS QDs can be conveniently tuned from 474 to 515 and 548 to 629 nm by adjusting the pH value when the ratios of Cu/Cd/Zn are fixed at 1 : 5 : 80 and 1 : 5 : 10, respectively. It is worth noting that under the condition of a constant Cu/Cd/Zn ratio, the UV-vis absorption spectra do not change with the fluorescence spectra, indicating that the band gap of QDs remains unchanged during the change of pH value. The photoluminescence (PL) quantum yield of the as-prepared QDs with yellow emission is up to 76%. The QDs also show excellent chemical stability after the deposition of the ZnS shell. Luminescent and flexible films are fabricated by combining Cu–Cd–Zn–S QDs with polyvinyl alcohol (PVA). The QD/PVA flexible hybrid films are successfully applied on top of a conventional blue InGaN chip for remote-type warm-white LEDs. As-fabricated warm-white LEDs exhibit a higher color rendering index (CRI) of about 89.2 and a correlated color temperature (CCT) of 4308 K. We present a facile route for the synthesis of water-soluble Cu–Cd–Zn–S/ZnS core/shell quantum dots (QDs) by simple pH regulation.![]()
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Affiliation(s)
- Shenjie Li
- School of Chemistry and Chemical Engineering
- Hefei University of Technology
- Hefei
- People's Republic of China
| | - Tianyong Zha
- School of Chemistry and Chemical Engineering
- Hefei University of Technology
- Hefei
- People's Republic of China
| | - Xiaoyu Gong
- School of Chemistry and Chemical Engineering
- Hefei University of Technology
- Hefei
- People's Republic of China
| | - Qi Hu
- School of Chemistry and Chemical Engineering
- Hefei University of Technology
- Hefei
- People's Republic of China
| | - Minghui Yu
- School of Chemistry and Chemical Engineering
- Hefei University of Technology
- Hefei
- People's Republic of China
| | - Jinyu Wu
- School of Chemistry and Chemical Engineering
- Hefei University of Technology
- Hefei
- People's Republic of China
| | - Ruolan Li
- School of Chemistry and Chemical Engineering
- Hefei University of Technology
- Hefei
- People's Republic of China
| | - Jiaming Wang
- School of Chemistry and Chemical Engineering
- Hefei University of Technology
- Hefei
- People's Republic of China
| | - Yanyan Chen
- School of Chemistry and Chemical Engineering
- Hefei University of Technology
- Hefei
- People's Republic of China
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13
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Hu G, Sun Y, Zhuang J, Zhang X, Zhang H, Zheng M, Xiao Y, Liang Y, Dong H, Hu H, Lei B, Hu C, Liu Y. Enhancement of Fluorescence Emission for Tricolor Quantum Dots Assembled in Polysiloxane toward Solar Spectrum-Simulated White Light-Emitting Devices. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e1905266. [PMID: 31782905 DOI: 10.1002/smll.201905266] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 11/08/2019] [Indexed: 06/10/2023]
Abstract
Commercial white light-emitting diodes (LEDs) have the undesirable characteristics of blue-rich emission and low color rendering index (CRI), while the constituent quantum dots (QDs) suffer from aggregation-induced fluorescence quenching and poor stability. Herein, a strategy is developed to assemble tricolor QDs into a polysiloxane matrix using a polymer-mediated hybrid approach whereby the hybrid composite exhibits a significant enhancement of aggregation-dispersed emission, outstanding photostability, high thermal stability, and outstanding fluorescence recovery. Using the as-prepared hybrid fluorescent materials, the fabricated LEDs exhibit solar spectrum-simulated emission with adjustable Commission Internationale de L'Eclairage coordinates, correlated color temperature, and a recorded CRI of 97. Furthermore, they present no ultraviolet emission and weak blue emission, thus indicating an ideal healthy and high-CRI white LED lighting source.
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Affiliation(s)
- Guangqi Hu
- Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Yuqiong Sun
- Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Jianle Zhuang
- Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Xuejie Zhang
- Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Haoran Zhang
- Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Mingtao Zheng
- Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Yong Xiao
- Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Yeru Liang
- Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Hanwu Dong
- Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Hang Hu
- Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Bingfu Lei
- Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Chaofan Hu
- Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Yingliang Liu
- Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
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14
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Soheyli E, Azad D, Sahraei R, Hatamnia AA, Rostamzad A, Alinazari M. Synthesis and optimization of emission characteristics of water-dispersible ag-in-s quantum dots and their bactericidal activity. Colloids Surf B Biointerfaces 2019; 182:110389. [DOI: 10.1016/j.colsurfb.2019.110389] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 07/08/2019] [Accepted: 07/23/2019] [Indexed: 02/07/2023]
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15
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Basha MAF. Optical properties and colorimetry of gelatine gels prepared in different saline solutions. J Adv Res 2019; 16:55-65. [PMID: 30899589 PMCID: PMC6412942 DOI: 10.1016/j.jare.2018.12.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 12/09/2018] [Accepted: 12/10/2018] [Indexed: 01/31/2023] Open
Abstract
Gelatine has been widely used in many multidisciplinary research fields due to its biocompatibility. Using saline solutions in the gelation of gelatine allows for new properties to be incorporated into the prepared gels. This study examined the optical and colour properties of gelatine gels prepared in saline solutions, containing three different metal chlorides (NiCl2·6H2O, CoCl2·6H2O, and CrCl3·6H2O) with concentrations of up to 50%, to prepare three groups of gels. FTIR spectroscopy indicated a loss in the helical structure of the metal-containing gelatine gels, and a shift in the amide bands towards lower wavenumbers. From the thermogravimetric analysis (TGA), the starting degradation temperatures (SDTs) of the prepared gelatine gels were found to be correlated to the concentration of the gelling solutions. All SDTs were above 250 °C, making these gels suitable for standing temperatures beyond the daily range. UV-vis spectroscopy showed that d-d transitions were responsible for the colour properties of the metal-containing gelatine gels. It is concluded that the studied properties and the measured parameters were found to depend on both salt type and concentration. With the current findings, the prepared gels can be used as optical thermometers, colour-selective corner cube retroreflectors, laser components, and coatings for OLEDs.
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Affiliation(s)
- Mohammad A F Basha
- Physics Department, Faculty of Science, Cairo University, P.O. Box 12613, Giza, Egypt
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16
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Qu M, Li H, Zhao Y, Zhang XM. Single-Component Color-Tunable Gd(pic) 3: Eu 3+ Phosphor Based on a Metal-Organic Framework for Near-UV White-Light-Emitting Diodes. ACS OMEGA 2019; 4:3593-3600. [PMID: 31459573 PMCID: PMC6649047 DOI: 10.1021/acsomega.8b02692] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Accepted: 12/07/2018] [Indexed: 06/10/2023]
Abstract
Compared with their multicomponent analogues, single-component white-light-emitting diodes (WLEDs) can eliminate the disadvantages such as high cost, fluorescence self-absorption, poor machinability, and reproducibility, but how to produce white light with high quality in a single-phase host is still a big challenge. In the work, a series of Eu3+/Tb3+-doped Gd(pic)3 and La(pic)3 are obtained through solvothermal conditions with picolinic acid (Hpic) and lanthanide nitrate. Researchers could regularly modulate the emitting color of phosphors by adjusting the excitation wavelength as well as the relative concentration of Ln3+ ions to obtain white light. Different luminance values [especially quantum yield (QYs)] between host materials Gd(pic)3 and La(pic)3 are investigated, which shows that doping of Eu3+ into Gd(pic)3 can improve QY to a great extent. By employing Gd0.9512Eu0.0488(pic)3 and Gd0.9141Eu0.0451Tb0.0408(pic)3 as phosphors, we successfully fabricated two excellent near-ultraviolet (365 nm) WLEDs with CIE chromaticity coordinates (0.3052, 0.3462) and (0.3007, 0.3448), relatively low color-correlated temperature (6755, 7001 K), and high color rendering index (R a = 71.8, 72.9). This approach may open a new prospect for developing single-phase near-ultraviolet phosphors with high efficiency.
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Affiliation(s)
- Mei Qu
- School
of Chemistry & Material Science, Shanxi
Normal University, Linfen 041004, P. R. China
| | - Huan Li
- Institute
of Crystalline Materials, Shanxi University, Taiyuan 030006, P. R. China
| | - Yanwu Zhao
- School
of Chemistry & Material Science, Shanxi
Normal University, Linfen 041004, P. R. China
| | - Xian-Ming Zhang
- School
of Chemistry & Material Science, Shanxi
Normal University, Linfen 041004, P. R. China
- Institute
of Crystalline Materials, Shanxi University, Taiyuan 030006, P. R. China
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17
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Wang L, Wang L, Yu J, Hao Z, Luo Y, Sun C, Han Y, Xiong B, Wang J, Li H. Abnormal Stranski-Krastanov Mode Growth of Green InGaN Quantum Dots: Morphology, Optical Properties, and Applications in Light-Emitting Devices. ACS APPLIED MATERIALS & INTERFACES 2019; 11:1228-1238. [PMID: 30521305 DOI: 10.1021/acsami.8b16767] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Stranski-Krastanov (SK) growth mode is widely adopted for the self-assembled growth of semiconductor quantum dots (QDs), wherein a relatively large critical thickness is essential and a thick wetting layer (WL) is formed beneath the QD layer. In this paper, we report the metal organic vapor phase epitaxy of green InGaN QDs, employing a growth interruption method to decrease the critical thickness and improve the morphology of QDs. The QDs exhibit similar photoluminescence properties with those grown by conventional SK mode, implying the existence of a WL. We experimentally verify that the formation of QDs, whether based on the SK mode or the growth interruption method, conforms to the phase separation theory. However, the density of QDs grown by the interruption method exhibits abnormal dependence on the strain when a quantum well (QW) is inserted beneath the QD layer. Furthermore, the underlying QW not only influences the morphology of the QDs but also plays as a reservoir of electrons, which helps enhance the photoluminescence and the electroluminescence of the QDs. The method of QD growth with improved morphology and luminescence by introducing the QW-QD coupled nanostructure is universally applicable to similar material systems. Furthermore, a 550 nm green light-emitting diode (LED) and a 526 nm superluminescent LED based on the nanostructure are demonstrated.
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Affiliation(s)
- Lai Wang
- Beijing National Research Center for Information Science and Technology (BNRist), Department of Electronic Engineering , Tsinghua University , Beijing 100084 , P. R. China
| | - Lei Wang
- Beijing National Research Center for Information Science and Technology (BNRist), Department of Electronic Engineering , Tsinghua University , Beijing 100084 , P. R. China
| | - Jiadong Yu
- Beijing National Research Center for Information Science and Technology (BNRist), Department of Electronic Engineering , Tsinghua University , Beijing 100084 , P. R. China
| | - Zhibiao Hao
- Beijing National Research Center for Information Science and Technology (BNRist), Department of Electronic Engineering , Tsinghua University , Beijing 100084 , P. R. China
| | - Yi Luo
- Beijing National Research Center for Information Science and Technology (BNRist), Department of Electronic Engineering , Tsinghua University , Beijing 100084 , P. R. China
| | - Changzheng Sun
- Beijing National Research Center for Information Science and Technology (BNRist), Department of Electronic Engineering , Tsinghua University , Beijing 100084 , P. R. China
| | - Yanjun Han
- Beijing National Research Center for Information Science and Technology (BNRist), Department of Electronic Engineering , Tsinghua University , Beijing 100084 , P. R. China
| | - Bing Xiong
- Beijing National Research Center for Information Science and Technology (BNRist), Department of Electronic Engineering , Tsinghua University , Beijing 100084 , P. R. China
| | - Jian Wang
- Beijing National Research Center for Information Science and Technology (BNRist), Department of Electronic Engineering , Tsinghua University , Beijing 100084 , P. R. China
| | - Hongtao Li
- Beijing National Research Center for Information Science and Technology (BNRist), Department of Electronic Engineering , Tsinghua University , Beijing 100084 , P. R. China
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18
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Mei S, Liu X, Zhang W, Liu R, Zheng L, Guo R, Tian P. High-Bandwidth White-Light System Combining a Micro-LED with Perovskite Quantum Dots for Visible Light Communication. ACS APPLIED MATERIALS & INTERFACES 2018; 10:5641-5648. [PMID: 29345894 DOI: 10.1021/acsami.7b17810] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
This work proposes a high-bandwidth white-light system consisting of a blue gallium nitride (GaN) micro-LED (μLED) exciting yellow-emitting CsPbBr1.8I1.2 perovskite quantum dots (YQDs) for high-speed real-time visible light communication (VLC). The packaged 80 μm × 80 μm blue-emitting μLED has a modulation bandwidth of ∼160 MHz and a peak emission wavelength of ∼445 nm. The achievable bandwidth of the white-light system is up to 85 MHz in the absence of filters and equalization technology. Meanwhile, the bandwidth of the YQDs as a color converter is as high as 73 MHz with the blue GaN μLED as the pump source. A maximum data rate of 300 Mbps can be achieved by taking advantage of the high bandwidth of the white-light system using the non-return-to-zero on-off keying (NRZ-OOK) modulation scheme. The resultant bit-error rate is 2.0 × 10-3, well beneath the forward error correction criterion of 3.8 × 10-3 required for error-free data transmission. In addition, the YQDs which we proposed as a color converter possess high stability for VLC. After half a year, the achievable bandwidths of the white-light system and the YQDs are still up to 83 and 70 MHz, respectively. This study provides the direction of developing high-bandwidth white-light system for both high-efficiency solid-state lighting and high-speed VLC.
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Affiliation(s)
- Shiliang Mei
- Institute for Electric Light Sources, School of Information Science and Technology, Engineering Research Center of Advanced Lighting Technology, Ministry of Education, Fudan University , Shanghai 200433, China
| | - Xiaoyan Liu
- Institute for Electric Light Sources, School of Information Science and Technology, Engineering Research Center of Advanced Lighting Technology, Ministry of Education, Fudan University , Shanghai 200433, China
| | - Wanlu Zhang
- Institute for Electric Light Sources, School of Information Science and Technology, Engineering Research Center of Advanced Lighting Technology, Ministry of Education, Fudan University , Shanghai 200433, China
| | - Ran Liu
- Institute for Electric Light Sources, School of Information Science and Technology, Engineering Research Center of Advanced Lighting Technology, Ministry of Education, Fudan University , Shanghai 200433, China
| | - Lirong Zheng
- Institute for Electric Light Sources, School of Information Science and Technology, Engineering Research Center of Advanced Lighting Technology, Ministry of Education, Fudan University , Shanghai 200433, China
| | - Ruiqian Guo
- Institute for Electric Light Sources, School of Information Science and Technology, Engineering Research Center of Advanced Lighting Technology, Ministry of Education, Fudan University , Shanghai 200433, China
| | - Pengfei Tian
- Institute for Electric Light Sources, School of Information Science and Technology, Engineering Research Center of Advanced Lighting Technology, Ministry of Education, Fudan University , Shanghai 200433, China
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19
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Feng Y, Zhang Y, Wei Y, Song X, Fu Y, Battaglia VS. A ZnS nanocrystal/reduced graphene oxide composite anode with enhanced electrochemical performances for lithium-ion batteries. Phys Chem Chem Phys 2018; 18:30630-30642. [PMID: 27790651 DOI: 10.1039/c6cp06609g] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A simple route for the preparation of ZnS nanocrystal/reduced graphene oxide (ZnS/RGO) by a hydrothermal synthesis process was achieved. The chemical composition, morphology, and structural characterization reveal that the ZnS/RGO composite is composed of sphalerite-phased ZnS nanocrystals uniformly dispersed on functional RGO sheets with a high specific surface area. The ZnS/RGO composite was utilized as an anode in the construction of a high-performance lithium-ion battery. The ZnS/RGO composite with appropriate RGO content exhibits a high reversible specific capacity (780 mA h g-1), excellent cycle stability over 100 cycles (71.3% retention), and good rate performance at 2C (51.2% of its capacity when measured at a 0.1C rate). To further investigate this ZnS/RGO anode for practical use in full Li-ion cells, we tested the electrochemical performance of the ZnS/RGO anode at different cut-off voltages for the first time. The presence of RGO plays an important role in providing high conductivity as well as a substrate with a high surface area. This helps alleviate the typically problems associated with volume expansion and shrinkage during prolonged cycling. Additionally, the RGO provides multiple nucleation points that result in a uniformly dispersed film of nanosized ZnS that covers its surface. Thus, the high surface area RGO enables high electronic conductivity and fast charge transfer kinetics for ZnS lithiation/delithiation.
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Affiliation(s)
- Yan Feng
- Key Laboratory of Inorganic-Organic Hybrid Functional Materials Chemistry (Tianjin Normal University), Ministry of Education, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, P. R. China. and Energy Storage and Distributed Resources Division, Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
| | - Yuliang Zhang
- Key Laboratory of Inorganic-Organic Hybrid Functional Materials Chemistry (Tianjin Normal University), Ministry of Education, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, P. R. China.
| | - Yuzhen Wei
- Key Laboratory of Inorganic-Organic Hybrid Functional Materials Chemistry (Tianjin Normal University), Ministry of Education, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, P. R. China.
| | - Xiangyun Song
- Energy Storage and Distributed Resources Division, Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
| | - Yanbo Fu
- Energy Storage and Distributed Resources Division, Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
| | - Vincent S Battaglia
- Energy Storage and Distributed Resources Division, Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
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20
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Chen B, Pradhan N, Zhong H. From Large-Scale Synthesis to Lighting Device Applications of Ternary I-III-VI Semiconductor Nanocrystals: Inspiring Greener Material Emitters. J Phys Chem Lett 2018; 9:435-445. [PMID: 29303589 DOI: 10.1021/acs.jpclett.7b03037] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Quantum dots with fabulous size-dependent and color-tunable emissions remained as one of the most exciting inventories in nanomaterials for the last 3 decades. Even though a large number of such dot nanocrystals were developed, CdSe still remained as unbeatable and highly trusted lighting nanocrystals. Beyond these, the ternary I-III-VI family of nanocrystals emerged as the most widely accepted greener materials with efficient emissions tunable in visible as well as NIR spectral windows. These bring the high possibility of their implementation as lighting materials acceptable to the community and also to the environment. Keeping these in mind, in this Perspective, the latest developments of ternary I-III-VI nanocrystals from their large-scale synthesis to device applications are presented. Incorporating ZnS, tuning the composition, mixing with other nanocrystals, and doping with Mn ions, light-emitting devices of single color as well as for generating white light emissions are also discussed. In addition, the future prospects of these materials in lighting applications are also proposed.
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Affiliation(s)
- Bingkun Chen
- Beijing Engineering Research Centre of Mixed Reality and Advanced Display, School of Optics and Photonics, Beijing Institute of Technology , Beijing 100081, China
| | - Narayan Pradhan
- Department of Materials Science, Indian Association for the Cultivation of Science , Kolkata, India 700032
| | - Haizheng Zhong
- Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems, School of Materials Science & Engineering, Beijing Institute of Technology , Beijing 100081, China
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21
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Kobosko SM, Jara DH, Kamat PV. AgInS 2-ZnS Quantum Dots: Excited State Interactions with TiO 2 and Photovoltaic Performance. ACS APPLIED MATERIALS & INTERFACES 2017; 9:33379-33388. [PMID: 28157296 DOI: 10.1021/acsami.6b14604] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Multinary quantum dots such as AgInS2 and alloyed AgInS2-ZnS are an emerging class of semiconductor materials for applications in photovoltaic and display devices. The nanocrystals of (AgInS2)x-(ZnS)1-x (for x = 0.67) exhibit a broad emission with a maximum at 623 nm and interact strongly with TiO2 nanostructures by injecting electrons from the excited state. The electron transfer rate constant as determined from transient absorption spectroscopy was 1.8 × 1010 s-1. The photovoltaic performance was evaluated over a period of a few weeks to demonstrate the stability of AgInS2-ZnS when utilized as sensitizers in solar cells. We report a power conversion efficiency of 2.25% of our champion cell 1 month after its fabrication. The limitations of AgInS2-ZnS nanocrystals in achieving greater solar cell efficiency are discussed.
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Affiliation(s)
- Steven M Kobosko
- Radiation Laboratory, ‡Department of Chemical and Biomolecular Engineering, and §Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556, United States
| | - Danilo H Jara
- Radiation Laboratory, ‡Department of Chemical and Biomolecular Engineering, and §Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556, United States
| | - Prashant V Kamat
- Radiation Laboratory, ‡Department of Chemical and Biomolecular Engineering, and §Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556, United States
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22
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Ding Q, Zhang X, Li L, Lou X, Xu J, Zhou P, Yan M. Temperature dependent photoluminescence of composition tunable Zn xAgInSe quantum dots and temperature sensor application. OPTICS EXPRESS 2017; 25:19065-19076. [PMID: 29041096 DOI: 10.1364/oe.25.019065] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 07/10/2017] [Indexed: 06/07/2023]
Abstract
Quantum dots (QDs) exhibit not only wide tunability of luminescence but also complex optical properties because of the large degree of freedom in their structure and chemical composition. Quaternary ZnxAgInSe QDs with different Zn/Ag ratios were synthesized and examined as temperature sensors. The relationship among the luminescence energy, emission intensity, and full-width at half-maximum (FWHM) of the emission band at different temperatures was investigated. To understand the photoluminescence mechanism, time-resolved photoluminescence spectra were recorded. Moreover, the dependence of the luminescence peak energy and FWHM on temperature was investigated, and a small deviation from the actual temperature was observed, indicative of the use of ZnxAgInSe QDs as high sensitivity temperature sensors.
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23
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Girma WM, Fahmi MZ, Permadi A, Abate MA, Chang JY. Synthetic strategies and biomedical applications of I–III–VI ternary quantum dots. J Mater Chem B 2017; 5:6193-6216. [DOI: 10.1039/c7tb01156c] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
In this review, we discuss recent advances of I–III–VI QDs with a major focus on synthesis and biomedical applications; advantages include low toxicity and fluorescent tuning in the biological window.
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Affiliation(s)
- Wubshet Mekonnen Girma
- Department of Chemical Engineering
- National Taiwan University of Science and Technology
- Taipei
- Republic of China
| | | | - Adi Permadi
- Department of Chemical Engineering
- National Taiwan University of Science and Technology
- Taipei
- Republic of China
| | - Mulu Alemayehu Abate
- Department of Chemical Engineering
- National Taiwan University of Science and Technology
- Taipei
- Republic of China
| | - Jia-Yaw Chang
- Department of Chemical Engineering
- National Taiwan University of Science and Technology
- Taipei
- Republic of China
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24
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Ramasamy P, Kim B, Lee MS, Lee JS. Beneficial effects of water in the colloidal synthesis of InP/ZnS core-shell quantum dots for optoelectronic applications. NANOSCALE 2016; 8:17159-17168. [PMID: 27540861 DOI: 10.1039/c6nr04713k] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
We demonstrate that the presence of a small amount of water as an impurity during the hot-injection synthesis can significantly decrease the emission lines full width at half-maximum (FWHM) and improve the quantum yield (QY) of InP/ZnS quantum dots (QDs). By utilizing the water present in the indium precursor and solvent, we obtained InP/ZnS QDs emitting around 530 nm with a FWHM as narrow as 46 nm and a QY up to 45%. Without water, the synthesized QDs have emission around 625 nm with a FWHM of 66 nm and a QY of about 33%. Absorption spectra, XRD and XPS analyses revealed that when water is present, an amorphous phosphate layer is formed over the InP QDs and inhibits the QD growth. This amorphous layer favors the formation of a very thick ZnS shell by decreasing the lattice mismatch between the InP core and the ZnS shell. We further show the possibility to tune the emission wavelengths of InP/ZnS QDs by simply adjusting the amount of water present in the system while keeping all the other reaction parameters (i.e., precursor concentration, reaction temperature and time) constant. As an example of their application in light-emitting diodes (LEDs), the green and red InP/ZnS QDs are combined with a blue LED chip to produce white light.
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Affiliation(s)
- Parthiban Ramasamy
- Department of Energy Systems Engineering, DGIST, Daegu 711-873, Republic of Korea.
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25
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Lu M, Bai X, Lin Y, Ji C, Wu H, Ruan C, Gao W, Wang Y, Du Q. Liquid-type AgInS2/ZnS quantum dot-based warm white light-emitting diodes. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.09.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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26
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Wang L, Kang X, Pan D. High color rendering index warm white light emitting diodes fabricated from AgInS2/ZnS quantum dot/PVA flexible hybrid films. Phys Chem Chem Phys 2016; 18:31634-31639. [DOI: 10.1039/c6cp06022f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A high color rendering warm-white LED is fabricated by fixing suitable thicknesses of the green and red AIS/ZnS QD/PVA luminescent films on top of a conventional blue InGaN chip.
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Affiliation(s)
- Lan Wang
- State Key Laboratory of Rare Earth Resource Utilization
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- P. R. China
| | - Xiaojiao Kang
- State Key Laboratory of Rare Earth Resource Utilization
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- P. R. China
| | - Daocheng Pan
- State Key Laboratory of Rare Earth Resource Utilization
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- P. R. China
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27
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Singh BP, Lin SY, Wang HC, Tang AC, Tong HC, Chen CY, Lee YC, Tsai TL, Liu RS. Inorganic red perovskite quantum dot integrated blue chip: a promising candidate for high color-rendering in w-LEDs. RSC Adv 2016. [DOI: 10.1039/c6ra16040a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Schematic representation of the generation of warm-white lightviaa red perovskite quantum dot (R-PQD) assisted YAG:Ce phosphor blend on a blue chip.
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Affiliation(s)
| | - Shin-Ying Lin
- Department of Chemistry
- National Taiwan University
- Taipei 10617
- Taiwan
| | - Hung-Chia Wang
- Department of Chemistry
- National Taiwan University
- Taipei 10617
- Taiwan
| | - An-Cih Tang
- Department of Chemistry
- National Taiwan University
- Taipei 10617
- Taiwan
| | | | | | - Yu-Chun Lee
- Lextar Electronics Corporation
- Hsinchu 300
- Taiwan
| | | | - Ru-Shi Liu
- Department of Chemistry
- National Taiwan University
- Taipei 10617
- Taiwan
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology
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