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Zaini MS, Liew JYC, Paiman S, Tee TS, Kamarudin MA. Solvent-Dependent Photoluminescence Emission and Colloidal Stability of Carbon Quantum dots from Watermelon Peels. J Fluoresc 2023:10.1007/s10895-023-03528-1. [PMID: 38038875 DOI: 10.1007/s10895-023-03528-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 11/24/2023] [Indexed: 12/02/2023]
Abstract
Waste peels are considered an environmental burden and typically disposed in landfills. The aim of this study was to investigate the effects of various solvents on the luminescence properties of carbon quantum dots (CQDs). Watermelon peels were recycled and reuse as precursors for the synthesis of biomass CQDs via a green carbonization method. The colloidal stability, surface charge, and particle size were characterized using zeta potential and dynamic light scattering (DLS). DLS revealed that the size of the CQDs was approximately 5.80 ± 0.4 nm to 9.74 ± 0.8 nm. The high-resolution transmission electron microscopy (HRTEM) results demonstrated a correlation with the DLS results. The optical properties were characterized by photoluminescence (PL) and UV-Visible (UV-Vis) spectroscopy. PL measurements at different excitation wavelengths revealed that the CQDs emissions were influenced by the polarity of the solvents. Meanwhile, the Fourier transform infra-red (FTIR) results showed the presence of oxygen-containing groups on the surface of the CQDs. These results deepen our understanding of the solvent-dependent behavior and colloidal stability of the CQDs.
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Affiliation(s)
- Muhammad Safwan Zaini
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, UPM Serdang, Selangor Darul Ehsan, Seri Kembangan, 43400, Malaysia
| | - Josephine Ying Chyi Liew
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, UPM Serdang, Selangor Darul Ehsan, Seri Kembangan, 43400, Malaysia
- Institute of Nanoscience and Nanotechnology, Universiti Putra Malaysia, UPM Serdang, Selangor Darul Ehsan, Seri Kembangan, 43400, Malaysia
| | - Suriati Paiman
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, UPM Serdang, Selangor Darul Ehsan, Seri Kembangan, 43400, Malaysia
- Institute of Nanoscience and Nanotechnology, Universiti Putra Malaysia, UPM Serdang, Selangor Darul Ehsan, Seri Kembangan, 43400, Malaysia
| | - Tan Sin Tee
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, UPM Serdang, Selangor Darul Ehsan, Seri Kembangan, 43400, Malaysia
| | - Mazliana Ahmad Kamarudin
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, UPM Serdang, Selangor Darul Ehsan, Seri Kembangan, 43400, Malaysia.
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Halim ND, Zaini MS, Talib ZA, Liew JYC, Kamarudin MA. Study of the Electron-Phonon Coupling in PbS/MnTe Quantum Dots Based on Temperature-Dependent Photoluminescence. Micromachines 2022; 13:mi13030443. [PMID: 35334735 PMCID: PMC8952767 DOI: 10.3390/mi13030443] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 03/04/2022] [Accepted: 03/09/2022] [Indexed: 12/17/2022]
Abstract
The temperature dependence of photoluminescence (PL) emission is a valuable tool for investigating carrier localization, recombination, and carrier–phonon interactions. Herein, electron–phonon couplings in lead sulfide (PbS) quantum dots (QDs) and lead sulfide/manganese tellurite (PbS/MnTe) QDs is reported. The effect of temperature on the PL emission of PbS and PbS/MnTe was explored within a temperature range of 10 to 300 K. When temperature increased, PL emission was blue-shifted due to the confinement effect. The gradual broadening of the full width at half maximum (FWHM) with increasing temperature indicates electron–phonon interactions. An analysis based on the Boson model revealed that the values of the exciton acoustic phonon coupling coefficient, σ, and temperature-dependent linewidth, γ, for PbS/MnTe were larger than those for PbS, indicating stronger exciton longitudinal-optical–phonon coupling in the compound structure.
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Affiliation(s)
- Nur Diyana Halim
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Selangor Darul Ehsan, Malaysia; (N.D.H.); (M.S.Z.); (J.Y.C.L.)
| | - Muhammad Safwan Zaini
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Selangor Darul Ehsan, Malaysia; (N.D.H.); (M.S.Z.); (J.Y.C.L.)
| | - Zainal Abidin Talib
- Department of Physics, College of Natural Sciences, Jeonbuk National University, 567, Baekje-daero, Deokjin-gu, Jeonju-si 54896, Jeollabuk-do, Korea;
| | - Josephine Ying Chyi Liew
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Selangor Darul Ehsan, Malaysia; (N.D.H.); (M.S.Z.); (J.Y.C.L.)
- Institute of Advanced Technology, Universiti Putra Malaysia, Serdang 43400, Selangor Darul Ehsan, Malaysia
| | - Mazliana Ahmad Kamarudin
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Selangor Darul Ehsan, Malaysia; (N.D.H.); (M.S.Z.); (J.Y.C.L.)
- Correspondence:
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Zaini MS, Liew JY, Alang Ahmad SA, Mohmad AR, Ahmad Kamarudin M. Photoluminescence Investigation of Carrier Localization in Colloidal PbS and PbS/MnS Quantum Dots. ACS Omega 2020; 5:30956-30962. [PMID: 33324803 PMCID: PMC7726743 DOI: 10.1021/acsomega.0c03768] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 10/20/2020] [Indexed: 06/12/2023]
Abstract
The existence of surface organic capping ligands on quantum dots (QDs) has limited the potential in QDs emission properties and energy band gap structure alteration as well as the carrier localization. This drawback can be addressed via depositing a thin layer of a semiconductor material on the surface of QDs. Herein, we report on the comparative study for photoluminescent (PL) properties of PbS and PbS/MnS QDs. The carrier localization effect due to the alteration of energy band gap structure and carrier recombination mechanism in the QDs were investigated via PL measurements in a temperature range of 10-300 K with the variation of the excitation power from 10 to 200 mW. For PbS QDs, the gradient of integrated PL intensity (IPL) as a function of excitation power density graph was less than unity. When the MnS shell layer was deposited onto the PbS core, the PL emission exhibited a blue shift, showing dominant carrier recombination. It was also found that the full width half-maximum showed a gradual broadening with the increasing temperature, affirming the electron-phonon interaction.
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Affiliation(s)
- Muhammad Safwan Zaini
- Department of Physics,
Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor Darul Ehsan, Malaysia
| | - Josephine Ying
Chyi Liew
- Department of Physics,
Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor Darul Ehsan, Malaysia
- Institute of Advanced
Technology, Universiti Putra Malaysia, 43400 Serdang, Selangor Darul Ehsan, Malaysia
| | - Shahrul Ainliah Alang Ahmad
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor Darul
Ehsan, Malaysia
- Institute of Advanced
Technology, Universiti Putra Malaysia, 43400 Serdang, Selangor Darul Ehsan, Malaysia
| | - Abdul Rahman Mohmad
- Institute of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
| | - Mazliana Ahmad Kamarudin
- Department of Physics,
Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor Darul Ehsan, Malaysia
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Zaini MS, Ahmad Kamarudin M, Josephine Liew YC, Alang Ahmad SA, Mohmad AR. Temperature and Power Dependence of Photoluminescence in PBS Quantum Dots Nanoparticles. SAINS MALAYS 2019. [DOI: 10.17576/jsm-2019-4806-16] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Lah ZMANH, Ahmad SAA, Zaini MS, Kamarudin MA. An Electrochemical Sandwich Immunosensor for the Detection of HER2 using Antibody-Conjugated PbS Quantum Dot as a label. J Pharm Biomed Anal 2019; 174:608-617. [PMID: 31265987 DOI: 10.1016/j.jpba.2019.06.024] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 05/28/2019] [Accepted: 06/19/2019] [Indexed: 01/20/2023]
Abstract
A facile electrochemical sandwich immunosensor for the detection of a breast cancer biomarker, the human epidermal growth factor receptor 2 (HER2), was designed, using lead sulfide quantum dots-conjugated secondary HER2 antibody (Ab2-PbS QDs) as a label. Using Ab2-PbS QDs in the development of electrochemical immunoassays leads to many advantages such as straightforward synthesis and well-defined stripping signal of Pb(II) through acid dissolution, which in turn yields better sensing performance for the sandwiched immunosensor. In the bioconjugation of PbS QDs, the available amine and hydroxyl groups from secondary anti-HER2 and capped PbS QDs were bound covalently together via carbonyldiimidazole (CDI) acting as a linker. In order to quantify the biomarker, SWV signal was obtained, where the Pb2+ ions after acid dissolution in HCl was detected. The plated mercury film SPCE was also detected in situ. Under optimal conditions, HER2 was detected in a linear range from 1-100 ng/mL with a limit of detection of 0.28 ng/mL. The measures of satisfactory recoveries were 91.3% to 104.3% for the spiked samples, displaying high selectivity. Therefore, this method can be applied to determine HER2 in human serum.
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Affiliation(s)
| | - Shahrul Ainliah Alang Ahmad
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, 43400, Selangor, Malaysia; Institute of Advanced Technology (ITMA), Universiti Putra Malaysia, Serdang, 43400, Selangor, Malaysia.
| | - Muhammad Safwan Zaini
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang, 43400, Selangor, Malaysia
| | - Mazliana Ahmad Kamarudin
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang, 43400, Selangor, Malaysia
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