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Liu Y, Ge G, Liu H, Wang Y, Zhou P, Li B, Zhu G. Fast and eco-friendly synthesis of carbon dots from pinecone for highly effective detection of 2,4,6-trinitrophenol in environmental samples. ENVIRONMENTAL TECHNOLOGY 2024:1-12. [PMID: 38887014 DOI: 10.1080/09593330.2024.2367725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Accepted: 05/08/2024] [Indexed: 06/20/2024]
Abstract
2,4,6-Trinitrophenol (TNP) has high explosive risks and biological toxicity, and there has been considerable concern over the determination of TNP. In the present work, fluorescent carbon dots (CDs) stemmed from a green carbon source of pinecone by the facile hydrothermal approach. A novel environment- friendly fluorescent probe was developed to efficiently detect TNP by using the obtained CDs with remarkable fluorescence stability. The fluorescent CDs exhibited obvious excitation dependence with the highest peaks for excitation and emission occurring at 321 and 411 nm, respectively. The fluorescence intensity is significantly reduced by TNP owing to the inner filter effect with the CDs. The probe exhibited good linearity with TNP concentrations in the range of 0.025-20 μg mL-1, and the limit of detection was as low as 8.5 ng mL-1. Additionally, the probe proved successful in sensing TNP quantitatively in actual environmental samples with satisfied recoveries of 95.6-99.6%. The developed fluorescent probe offered an environment-friendly, efficient, rapid, and reliable platform for detecting trace TNP in the environmental field.HighlightsNovel carbon dots were synthesised from green precursors of pineal powder.The highly effective quenching process was put down to the inner filter effect.The as-constructed fluorescent probe was successfully utilised for sensing 2,4,6-trinitrophenol in environmental samples.The proposed method was simple, rapid, efficient, economical, and eco-friendly.
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Affiliation(s)
- Yongli Liu
- School of Environment, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environment Pollution Control, Henan Province's International Joint Laboratory on Key Techniques in Water Treatment, Henan Normal University, Xinxiang, People's Republic of China
| | - Guobei Ge
- School of Environment, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environment Pollution Control, Henan Province's International Joint Laboratory on Key Techniques in Water Treatment, Henan Normal University, Xinxiang, People's Republic of China
| | - Huanjia Liu
- School of Environment, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environment Pollution Control, Henan Province's International Joint Laboratory on Key Techniques in Water Treatment, Henan Normal University, Xinxiang, People's Republic of China
| | - Yuxin Wang
- School of Environment, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environment Pollution Control, Henan Province's International Joint Laboratory on Key Techniques in Water Treatment, Henan Normal University, Xinxiang, People's Republic of China
| | - Penghui Zhou
- School of Environment, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environment Pollution Control, Henan Province's International Joint Laboratory on Key Techniques in Water Treatment, Henan Normal University, Xinxiang, People's Republic of China
| | - Bin Li
- School of Environment, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environment Pollution Control, Henan Province's International Joint Laboratory on Key Techniques in Water Treatment, Henan Normal University, Xinxiang, People's Republic of China
| | - Guifen Zhu
- School of Environment, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environment Pollution Control, Henan Province's International Joint Laboratory on Key Techniques in Water Treatment, Henan Normal University, Xinxiang, People's Republic of China
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2
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Koparde SV, Nille OS, Kolekar AG, Bote PP, Gaikwad KV, Anbhule PV, Pawar SP, Kolekar GB. Okra peel-derived nitrogen-doped carbon dots: Eco-friendly synthesis and multi-functional applications in heavy metal ion sensing, nitro compound detection and environmental remediation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 321:124659. [PMID: 38943759 DOI: 10.1016/j.saa.2024.124659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Revised: 05/23/2024] [Accepted: 06/11/2024] [Indexed: 07/01/2024]
Abstract
The present study explores the kitchen waste okra peels derived synthesis of nitrogen doped carbon dots (N-CDs) via simple carbonization followed by reflux method. The synthesized N-CDs was characterized using, TEM, XPS, FTIR, XRD, Raman, UV-Visible and Fluorescence Spectroscopy. The N-CDs emits bright blue emission at 420 nm with 12 % of quantum yield as well as it follows excitation dependent emission. Further, the N-CDs were employed as a fluorescence sensor for detection of hazardous metal ions and nitro compounds. Among various metal ions and nitro compounds, the N-CDs shows fluorescence quenching response towards Cr6+, and Mn7+ metal ions as well as 4-nitroaniline (4-NA) and picric acid (PA) with significant hypsochromic and bathochromic shift for Mn7+, 4-NA and PA respectively. The developed fluorescent probe shows relatively low limit of detection (LOD) of 1.46 µg/mL, 1.05 µg/mL, 2.1 µg/mL and 2.2 µg/mL for the above analytes respectively. The N-CDs did not show any significant interference with coexisting ions and successfully applied for real water sample analysis. In addition, circular economy approach was employed for adsorption of dyes by reactivating leftover waste carbon residue which was obtained after reflux. Thus, the kitchen waste valorization and circular economy approach based N-CDs have potential applications in the field of detection of emerging pollutants, and environmental remediation.
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Affiliation(s)
- Sneha V Koparde
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry Shivaji University, Kolhapur-416004, (MS), India; Department of Chemistry, Rajarshi Chhatrapati Shahu College, Kolhapur-416003, (MS), India
| | - Omkar S Nille
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry Shivaji University, Kolhapur-416004, (MS), India
| | - Akanksha G Kolekar
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry Shivaji University, Kolhapur-416004, (MS), India
| | - Prachi P Bote
- Department of Chemistry, Rajarshi Chhatrapati Shahu College, Kolhapur-416003, (MS), India
| | - Kishor V Gaikwad
- Department of Chemistry, Rajarshi Chhatrapati Shahu College, Kolhapur-416003, (MS), India
| | - Prashant V Anbhule
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry Shivaji University, Kolhapur-416004, (MS), India
| | - Samadhan P Pawar
- Department of Chemistry, Rajarshi Chhatrapati Shahu College, Kolhapur-416003, (MS), India.
| | - Govind B Kolekar
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry Shivaji University, Kolhapur-416004, (MS), India.
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3
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Jian HJ, Anand A, Lai JY, Huang CC, Ma DHK, Lai CC, Chang HT. Ultrahigh-Efficacy VEGF Neutralization Using Carbonized Nanodonuts: Implications for Intraocular Anti-Angiogenic Therapy. Adv Healthc Mater 2024; 13:e2302881. [PMID: 38130100 DOI: 10.1002/adhm.202302881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 12/11/2023] [Indexed: 12/23/2023]
Abstract
Ocular angiogenesis, associated with diseases such as retinopathy of prematurity and diabetic retinopathy, is a leading cause of irreversible vision loss. Herein, carbon nanodonuts (CNDs) with a donut-shaped structure are synthesized using sodium alginate (SA) and 1,8-diaminooctane (DAO) through a one-step thermal process. The formation of SA/DAO-CNDs occurs through a crosslinking reaction between SA and DAO, creating amide bonds followed by partial carbonization. In human retinal pigment epithelial cells exposed to H2 O2 or lipopolysaccharide, the SA/DAO-CNDs display a more than fivefold reduction in reactive oxygen species and proinflammatory cytokines, such as IL-6 and IL-1β, when compared to carbonized nanomaterials produced exclusively from SA. Furthermore, the CNDs effectively inhibit vascular endothelial growth factor A-165 (VEGF-A165 )-induced cell migration and tube formation in human umbilical vein endothelial cells due to their strong affinity for VEGF-A165 , with a dissociation constant of 2.2 × 10-14 M, over 1600 times stronger than the commercial drug bevacizumab (Avastin). Trypsin digestion coupled with LC-MS/MS analysis reveals that VEGF-A165 interacts with SA/DAO-CNDs through its heparin-binding domain, leading to activity loss. The SA/DAO-CNDs demonstrate excellent biocompatibility and potent anti-angiogenic effects in chicken embryos and rabbit eyes. These findings suggest that SA/DAO-CNDs hold promise as a therapeutic agent for treating various angiogenesis-related ocular diseases.
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Affiliation(s)
- Hong-Jyuan Jian
- Department of Biomedical Engineering, Chang Gung University, Taoyuan, 33302, Taiwan
| | - Anisha Anand
- Department of Biomedical Engineering, Chang Gung University, Taoyuan, 33302, Taiwan
| | - Jui-Yang Lai
- Department of Biomedical Engineering, Chang Gung University, Taoyuan, 33302, Taiwan
- Department of Ophthalmology, Chang Gung Memorial Hospital, Linkou, Taoyuan, 33305, Taiwan
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City, 24301, Taiwan
- Research Center for Chinese Herbal Medicine, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan, 33303, Taiwan
| | - Chih-Ching Huang
- Department of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, 20224, Taiwan
- Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, 20224, Taiwan
- School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan
| | - David Hui-Kang Ma
- Department of Ophthalmology, Chang Gung Memorial Hospital, Linkou, Taoyuan, 33305, Taiwan
- Department of Chinese Medicine, Chang Gung University, Taoyuan, 33302, Taiwan
| | - Chi-Chun Lai
- Department of Ophthalmology, Chang Gung Memorial Hospital, Linkou, Taoyuan, 33305, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, 33302, Taiwan
- Department of Ophthalmology, Chang Gung Memorial Hospital, Keelung, 20401, Taiwan
| | - Huan-Tsung Chang
- Department of Biomedical Sciences, Chang Gung University, Taoyuan, 33302, Taiwan
- Graduate Institute of Biomedical Sciences, Chang Gung University, Taoyuan, 33302, Taiwan
- Center for Advanced Biomaterials and Technology Innovation, Chang Gung University, Taoyuan, 33302, Taiwan
- Division of Breast Surgery, Department of General Surgery, Chang Gung Memorial Hospital, Linkou, Taoyuan, 33305, Taiwan
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Sudewi S, Li CH, Chabib L, Rasool A, Arputharaj E, Zulfajri M, Huang GG. Turn-off/turn-on biosensing of tetracycline and ciprofloxacin antibiotics using fluorescent iron oxide quantum dots. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:1261-1271. [PMID: 38323472 DOI: 10.1039/d3ay02168h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
A fluorescence probe based on iron oxide quantum dots (IO-QDs) was synthesized using the hydrothermal method for the determination of tetracycline (TCy) and ciprofloxacin (CPx) in aqueous solution. The IO-QDs were characterized using high-resolution transmission electron microscopy (HR-TEM), powder X-ray diffraction (P-XRD), vibrating sample magnetometry (VSM), and Fourier-transform infrared spectroscopy (FTIR). The as-prepared IO-QDs are fluorescent, stable, and with a fluorescence quantum yield (QY) of 9.8 ± 0.12%. The fluorescence of IO-QDs was observed to be quenched and enhanced in the presence of TCy and CPx, respectively. The fluorescence intensity ratio shows linearity at concentrations from 1-100 μM and 5-100 μM for TCy and CPx, respectively; the detection limit for TCy and CPx was estimated to be 0.71 μM and 1.56 μM, respectively. The proposed method was also successfully utilized in the spiked samples of drinking water and honey with good recoveries. The method offered convenience, rapid detection, high sensitivity, selectivity, and cost-efficient alternative options for the determination of TCy and CPx in real samples.
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Affiliation(s)
- Sri Sudewi
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
- Department of Pharmacy, Faculty of Mathematics and Natural Science, Universitas Sam Ratulangi, Manado 95115, Indonesia
| | - Chien-Hung Li
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
| | - Lutfi Chabib
- Pharmacy Study Program, Faculty of Mathematics and Science, Universitas Islam Indonesia, Yogyakarta 55584, Indonesia
| | - Akhtar Rasool
- Research Center for Chemistry, National Research and Innovation Agency (BRIN), KST BJ Habibie, Setu, Tangerang Selatan 15314, Indonesia
| | - Emmanuvel Arputharaj
- Department of Medical Laboratory Science and Biotechnology, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Muhammad Zulfajri
- Department of Chemistry Education, Universitas Serambi Mekkah, Banda Aceh 23245, Indonesia
| | - Genin Gary Huang
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
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5
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Luo Q, Liu H, Li D, Dai J, Xia L, Jiang J, Xu Y, Zeng B, Luo W, Dai L. Carboxymethylcellulose hydrogels with stable carbon quantum dots: Enabling dynamic fluorescence modulation, automatic erasure, and secure information encryption. Carbohydr Polym 2024; 326:121610. [PMID: 38142072 DOI: 10.1016/j.carbpol.2023.121610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 11/14/2023] [Accepted: 11/15/2023] [Indexed: 12/25/2023]
Abstract
Inspired by "disappear after reading", a time-modulated encryption hydrogel was synthesized by carboxymethyl cellulose with carbon quantum dots. Carboxymethyl cellulose in this system stabilized carbon quantum dots, which ensured the whole hydrogel worked well. The encryption/decryption of information depended on pH adjustment, application of EDTA and Cr (VI). Furthermore, an in-depth analysis of the fluorescence change mechanism uncovered that fluorescence quenching was potentially influenced by internal filtering effects and static quenching, which involved the amino, carboxyl, and hydroxyl groups present within the hydrogel.
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Affiliation(s)
- Qiuyan Luo
- College of Materials, Fujian Provincial Key Laboratory of Fire Retardant Materials, Xiamen Key Laboratory of Fire Retardant Materials, Xiamen University, Xiamen 361005, China
| | - Hao Liu
- College of Materials, Fujian Provincial Key Laboratory of Fire Retardant Materials, Xiamen Key Laboratory of Fire Retardant Materials, Xiamen University, Xiamen 361005, China
| | - Dongxu Li
- College of Materials, Fujian Provincial Key Laboratory of Fire Retardant Materials, Xiamen Key Laboratory of Fire Retardant Materials, Xiamen University, Xiamen 361005, China
| | - Juguo Dai
- College of Materials, Fujian Provincial Key Laboratory of Fire Retardant Materials, Xiamen Key Laboratory of Fire Retardant Materials, Xiamen University, Xiamen 361005, China
| | - Long Xia
- College of Materials, Fujian Provincial Key Laboratory of Fire Retardant Materials, Xiamen Key Laboratory of Fire Retardant Materials, Xiamen University, Xiamen 361005, China
| | - Jia Jiang
- College of Materials, Fujian Provincial Key Laboratory of Fire Retardant Materials, Xiamen Key Laboratory of Fire Retardant Materials, Xiamen University, Xiamen 361005, China
| | - Yiting Xu
- College of Materials, Fujian Provincial Key Laboratory of Fire Retardant Materials, Xiamen Key Laboratory of Fire Retardant Materials, Xiamen University, Xiamen 361005, China.
| | - Birong Zeng
- College of Materials, Fujian Provincial Key Laboratory of Fire Retardant Materials, Xiamen Key Laboratory of Fire Retardant Materials, Xiamen University, Xiamen 361005, China
| | - Weiang Luo
- College of Materials, Fujian Provincial Key Laboratory of Fire Retardant Materials, Xiamen Key Laboratory of Fire Retardant Materials, Xiamen University, Xiamen 361005, China
| | - Lizong Dai
- College of Materials, Fujian Provincial Key Laboratory of Fire Retardant Materials, Xiamen Key Laboratory of Fire Retardant Materials, Xiamen University, Xiamen 361005, China.
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6
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Abdella AA, Zaki AM, Hammad S, Mansour FR. Rapid environmentally benign label free detection of heparin using highly fluorescent N,S-CDs sensing probe through a turn-on mechanism. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 306:123609. [PMID: 37935079 DOI: 10.1016/j.saa.2023.123609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 10/14/2023] [Accepted: 10/31/2023] [Indexed: 11/09/2023]
Abstract
Heparin (HEP) is one of the oldest anticoagulant drugs that currently still in widespread clinical use. It lacks chromophore and not easily derivatized due to its hydrophilic nature. In this work we developed a green, selective, and sensitive fluorescence sensor for detection of HEP in its injection dosage forms. The sensor is composed of nitrogen and sulfur co-doped carbon quantum dots (N,S-CDs) semi quenched by Fe3+. The N,S-CDs were prepared using microwave assisted pyrolysis in 3.5 min and exhibited high emission at 425 nm after excitation at 350 nm with high quantum yield of 96%. Owing to the anionic nature of HEP, it could compete with N,S-CDs for Fe3+ complexation resulting in turning-on the quenched fluorescence. This fluorescence enhancement was linear over a concentration range between 6 and 20 μg/mL (R2 = 0.99) with a limit of detection of 1.41 µg/ml. The accuracy and precision of the proposed sensor were indicated by percentage recovery values between 98% -102% and %RSD less than 2, respectively. Furthermore, the proposed sensor was successfully applied for determination of HEP in injection dosage form. The developed sensor showed excellent greenness on analytical eco-scale (score 93%) and GAPI scale.
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Affiliation(s)
- Aya A Abdella
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Tanta University, 31111, Egypt.
| | - Asmaa M Zaki
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Tanta University, 31111, Egypt.
| | - Sherin Hammad
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Tanta University, 31111, Egypt.
| | - Fotouh R Mansour
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Tanta University, 31111, Egypt.
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7
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Bhowmick S, Mukherjee J, Ghosal M, Nayak C, Satpati B, Pramanik G, Karmakar P. Green to deep-red emissive carbon dot formation by C +ion implantation on nitrogen beam created self-masked nano-template. NANOTECHNOLOGY 2024; 35:125301. [PMID: 38086069 DOI: 10.1088/1361-6528/ad14b1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Accepted: 12/12/2023] [Indexed: 01/05/2024]
Abstract
We report the formation of green to red emissive arrays of carbon dot on silicon-nitride nano-templates by successive implantation of nitrogen and carbon broad ion beams. The patterned nano-templates are formed by 14 keV N2+ion-bombardment at grazing incident (70°) on Si. Subsequently, 5 keV C+ions are implanted at the selective sites of the pyramidal nano-template by taking advantage of the self-masking effect. The nano-pyramidal pattern and the implanted carbon dots at the specific sites are confirmed by atomic force microscopy and cross sectional transmission electron microscopy measurements. The developed carbon dots (CDs) are mostly amorphous and consists of SiC and graphitic nitrogen (CN). G-band and D-band carbons are identified by Raman spectroscopy, while the presence of SiC and CN are detected by XPS measurements. A change of band-gap is observed for C-implanted templates by the UV-vis spectroscopy. Excitation wavelength-dependent photoemission from the dots is found in the green to red region. Maximum intense PL is observed in the green-orange region for excitation wavelength of 425 nm and a redshift of PL with decreasing intensity is observed with the increase of excitation wavelength. The observed photoluminescence is described in terms of the combined effects of quantum confinement, graphitic nitrogen and defect induced additional states formation in the carbon dots. The potential applications of CDs are also addressed.
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Affiliation(s)
- Sudip Bhowmick
- Ion Beam Development and Application Section, RIBF Group, Variable Energy Cyclotron Centre, HBNI, 1/AF, Bidhannagar, Kolkata, 700064, India
| | - Joy Mukherjee
- Ion Beam Development and Application Section, RIBF Group, Variable Energy Cyclotron Centre, HBNI, 1/AF, Bidhannagar, Kolkata, 700064, India
| | - Manorama Ghosal
- Saha Institute of Nuclear Physics, HBNI, 1/AF, Bidhannagar, Kolkata, 700064, India
| | - Chumki Nayak
- J. C. Bose Institute, Acharya Prafulla Chandra Road, Kolkata, 700009, India
| | - Biswarup Satpati
- Saha Institute of Nuclear Physics, HBNI, 1/AF, Bidhannagar, Kolkata, 700064, India
| | - Goutam Pramanik
- UGC-DAE Consortium for Scientific Research, Kolkata Centre, LB-8, Bidhannagar, Kolkata, 700106, India
| | - Prasanta Karmakar
- Ion Beam Development and Application Section, RIBF Group, Variable Energy Cyclotron Centre, HBNI, 1/AF, Bidhannagar, Kolkata, 700064, India
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8
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Kuo WS, Chang CY, Chuang HY, Su PL, Wang JY, Wu PC, Kao HF, Tseng SW, Lin SH, Lin YS, Chang CC. Single-sized N-functionality graphene quantum dot in tunable dual-modality near infrared-I/II illumination detection and photodynamic therapy under multiphoton nonlinear excitation. Biosens Bioelectron 2023; 241:115648. [PMID: 37690354 DOI: 10.1016/j.bios.2023.115648] [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: 07/04/2023] [Revised: 08/18/2023] [Accepted: 08/29/2023] [Indexed: 09/12/2023]
Abstract
Doping sorted graphene quantum dots (GQDs) with heteroatoms and functionalizing them with amino acid could improve their radiative recombination and two-photon properties-including their excitation-wavelength-independent photoluminescence from the ultraviolet to the near-infrared-I (NIR-I) region, absorption, quantum yield, absolute cross section, lifetime, and radiative-to-nonradiative decay ratio-under two-photon excitation (TPE) at a low excitation energy and short photoexcitation duration, as determined using a self-made optical microscopy system with a femtosecond Ti-sapphire laser. Four types of sorted GQDs were investigated: undoped GQDs, nitrogen-doped GQDs (N-GQDs), amino-functionalized GQDs (amino-GQDs), and N-doped and amino-functionalized GQDs (amino-N-GQDs). Among them, the sorted amino-N-GQDs are effective as a two-photon photosensitizer and generate the highest quantity of reactive oxygen species for the elimination of multidrug-resistant cancer cells through two-photon photodynamic therapy (PDT). Larger amino-N-GQDs result in a greater number of C-N and N-functionalities, leading to a superior photochemical effect and more favorable intrinsic luminescence properties, making the dots effective contrast agents for tracking and localizing cancer cells during in-depth bioimaging in a three-dimensional biological environment under TPE in the NIR-II region. Overall, this study highlights the potential of large amino-N-GQDs as a material for future application to dual-modality two-photon PDT and biomedical imaging.
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Affiliation(s)
- Wen-Shuo Kuo
- Center for Allergy Immunology and Microbiome (AIM), China Medical University Children's Hospital/China Medical University Hospital, China Medical University, Taichung, 404, Taiwan
| | - Chia-Yuan Chang
- Department of Mechanical Engineering, National Cheng Kung University, Tainan, 701, Taiwan
| | - Hao-Yu Chuang
- Cell Therapy Center / Department of Neurosurgery, An Nan Hospital, China Medical University, Tainan, 709, Taiwan; Department of Neurosurgery, China Medical University Beigang Hospital, Yunlin County, 651, Taiwan
| | - Po-Lan Su
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, 701, Taiwan
| | - Jiu-Yao Wang
- Center for Allergy Immunology and Microbiome (AIM), China Medical University Children's Hospital/China Medical University Hospital, China Medical University, Taichung, 404, Taiwan
| | - Ping-Ching Wu
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, 701, Taiwan
| | - Hui-Fang Kao
- Department of Nursing, National Tainan Junior College of Nursing, Tainan, 700, Taiwan
| | - Shih-Wen Tseng
- Core Facility Center of National Cheng Kung University, National Cheng Kung University, Tainan, 701, Taiwan
| | - Sheng-Han Lin
- Department of Anesthesiology, E-Da Hospital, I-Shou University, Kaohsiung, 824, Taiwan.
| | - Yen-Sung Lin
- Division of Pulmonary and Critical Care Medicine, An Nan Hospital, China Medical University, Tainan, 709, Taiwan; Department of Nursing, Chung Hwa University of Medical Technology, Tainan, 717, Taiwan.
| | - Chan-Chi Chang
- Department of Otolaryngology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, 701, Taiwan.
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9
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Chandrashekar P, Jena MK, Krishnan G, Pathak B, Mandal S. Photoluminescence Properties of a Chiral One-Dimensional Silver Chalcogenolate Chain. Inorg Chem 2023. [PMID: 37988555 DOI: 10.1021/acs.inorgchem.3c03292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
Atom-precise metal nanoclusters, which contain a few tens to hundreds of atoms, have drawn significant interest due to their interesting physicochemical properties. Structural analysis reveals a fundamental architecture characterized by a central core or kernel linked to a staple motif with metal-ligand bonding playing a pivotal role. Ligands not only protect the surface but also exert a significant influence in determining the overall assembly of the larger superstructures. The assemblies of nanoclusters are driven by weak interaction between the ligand molecules; it also depends on the ligand type and functional group present. Here, we report an achiral ligand and Ag(I)···Ag(I) interaction-driven spontaneous resolution of silver-thiolate structure, [Ag18(C6H11S)12(CF3COO)6(DMA)2], where silver atoms and cyclohexanethiolate are connected to form a one-dimensional chain with helicity. Notably, silver atoms adopt different types of coordination modes and geometries. The photoluminescence properties of the one-dimensional (1D) chain structure were investigated, and it was found to exhibit excitation-dependent emission properties attributed to hydrogen-bonding interactions. Experimental and theoretical investigations corroborate the presence of triplet-emitting ligand-to-metal charge-transfer transitions.
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Affiliation(s)
- Priyanka Chandrashekar
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Thiruvananthapuram, Kerala 69551, India
| | - Milan Kumar Jena
- Department of Chemistry, Indian Institute of Technology (IIT) Indore, Indore, Madhya Pradesh 453552, India
| | - Gokul Krishnan
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Thiruvananthapuram, Kerala 69551, India
| | - Biswarup Pathak
- Department of Chemistry, Indian Institute of Technology (IIT) Indore, Indore, Madhya Pradesh 453552, India
| | - Sukhendu Mandal
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Thiruvananthapuram, Kerala 69551, India
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10
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Taravatfard AZ, Ceballos-Gonzalez C, Siddique AB, Bolivar-Monsalve J, Madadelahi M, Trujillo-de Santiago G, Moisés Alvarez M, Pramanick AK, Martinez Guerra E, Kulinsky L, Madou MJ, Martinez SO, Ray M. Nitrogen-functionalized graphene quantum dot incorporated GelMA microgels as fluorescent 3D-tissue Constructs. NANOSCALE 2023; 15:16277-16286. [PMID: 37650749 DOI: 10.1039/d3nr02612d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
Biopolymer microgels present many opportunities in biomedicine and tissue engineering. To understand their in vivo behavior in therapeutic interventions, long-term monitoring is critical, which is usually achieved by incorporating fluorescent materials within the hydrogel matrix. Current research is limited due to issues concerning the biocompatibility and instability of the conventional fluorescent species, which also tend to adversely affect the bio-functionality of the hydrogels. Here, we introduce a microfluidic-based approach to generate nitrogen-functionalized graphene quantum dot (NGQD) incorporated gelatin methacryloyl (GelMA) hydrogel microspheres, capable of long-term monitoring while preserving or enhancing the other favorable features of 3D cell encapsulation. A multilayer droplet-based microfluidic device was designed and fabricated to make monodisperse NGQD-loaded GelMA hydrogel microspheres encapsulating skeletal muscle cells (C2C12). Control over the sizes of microspheres could be achieved by tuning the flow rates in the microfluidic device. Skeletal muscle cells encapsulated in these microgels exhibited high cell viability from day 1 (82.9 ± 6.50%) to day 10 (92.1 ± 3.90%). The NGQD-loaded GelMA microgels encapsulating the cells demonstrated higher metabolic activity compared to the GelMA microgels. Presence of sarcomeric α-actin was verified by immunofluorescence staining on day 10. A fluorescence signal was observed from the NGQD-loaded microgels during the entire period of the study. The investigation reveals the advantages of integrating NGQDs in microgels for non-invasive imaging and monitoring of cell-laden microspheres and presents new opportunities for future therapeutic applications.
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Affiliation(s)
- Aida Zahra Taravatfard
- School of Engineering and Sciences, Tecnológico de Monterrey, Monterrey, 64849, Mexico.
- Department of Mechanical and Aerospace Engineering, University of California, Irvine, CA 92697, USA
| | | | - Abu Bakar Siddique
- School of Engineering and Sciences, Tecnológico de Monterrey, Monterrey, 64849, Mexico.
| | | | - Masoud Madadelahi
- School of Engineering and Sciences, Tecnológico de Monterrey, Monterrey, 64849, Mexico.
| | - Grissel Trujillo-de Santiago
- Centro de Biotecnología-FEMSA, Tecnológico de Monterrey, Monterrey 64849, Mexico
- Departamento de Ingeniería Mecatrónica y Eléctrica, Tecnológico de Monterrey, Monterrey 64849, Mexico
| | - Mario Moisés Alvarez
- Centro de Biotecnología-FEMSA, Tecnológico de Monterrey, Monterrey 64849, Mexico
- Departamento de Ingeniería Mecatrónica y Eléctrica, Tecnológico de Monterrey, Monterrey 64849, Mexico
| | | | - Eduardo Martinez Guerra
- Centro de Investigaciones en Materiales Avanzados, CIMAV Unidad Monterrey, Alianza Norte 202, Apodaca, Nuevo León, C.P. 66628, Mexico
| | - Lawrence Kulinsky
- Department of Mechanical and Aerospace Engineering, University of California, Irvine, CA 92697, USA
| | - Marc J Madou
- School of Engineering and Sciences, Tecnológico de Monterrey, Monterrey, 64849, Mexico.
- Department of Mechanical and Aerospace Engineering, University of California, Irvine, CA 92697, USA
| | - Sergio O Martinez
- School of Engineering and Sciences, Tecnológico de Monterrey, Monterrey, 64849, Mexico.
| | - Mallar Ray
- School of Engineering and Sciences, Tecnológico de Monterrey, Monterrey, 64849, Mexico.
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11
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Huang YC, Lai JZ, Luo CL, Chuang CC, Lin TC, Wang PH, Chien FC. A Fluorescent Vector of Carbon Dot to Deliver Rab13 and Rab14 Plasmids for Promoting Neurite Outgrowth. ACS APPLIED BIO MATERIALS 2023; 6:3739-3749. [PMID: 37679053 DOI: 10.1021/acsabm.3c00418] [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] [Indexed: 09/09/2023]
Abstract
The complex processes of neuron differentiation and neuron repair are critical for treating nervous system injuries and neurodegenerative diseases. Neurite outgrowth plays a crucial role in these processes by enabling the formation of connections between neurons and the generation of neuroplasticity to restore the function of the nervous system. In this study, we fabricated functionalized carbon dots (CDs) with distinctive photoluminescence and low cytotoxicity for use as fluorescence imaging probes and nanocarriers to deliver plasmid DNAs to neurons effectively for inducing neurite outgrowth. CDs were prepared through a reflux process in nitric acid solution, and their surface was then modified using polyethylenimine (PEI) to obtain positively charged CDs for increasing the absorption of plasmid DNAs and the efficiency of cell uptake. Experimental results indicated that the fabricated CDs maintained a low cytotoxicity and exhibited a high neuron uptake of up to 97%. An improvement in the plasmid DNA ingestion of neurons resulted in enhanced expression of Rab13-Q67L and Rab14 proteins, which considerably promoted neurite sprouting and elongation. After the fabricated PEI-modified CDs were used to deliver the Rab13-Q67L and Rab14 plasmids, more than 56% of the neurons had a neurite length that was greater than twice the size of their soma. Thus, DNA delivery through functionalized CDs has a high potential for use in gene therapy for neuronal injuries and diseases.
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Affiliation(s)
- Yung-Chin Huang
- Department of Optics and Photonics, National Central University, Taoyuan 32001, Taiwan
| | - Jian-Zong Lai
- Department of Optics and Photonics, National Central University, Taoyuan 32001, Taiwan
| | - Ching-Lung Luo
- Department of Optics and Photonics, National Central University, Taoyuan 32001, Taiwan
| | - Chia-Cheng Chuang
- Department of Optics and Photonics, National Central University, Taoyuan 32001, Taiwan
| | - Tzu-Chau Lin
- Photonic Materials Research Laboratory, Department of Chemistry, National Central University, Taoyuan 32001, Taiwan
| | - Po-Hsiang Wang
- Graduate Institute of Environmental Engineering, National Central University, Taoyuan 32001, Taiwan
| | - Fan-Ching Chien
- Department of Optics and Photonics, National Central University, Taoyuan 32001, Taiwan
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12
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Huang P, Li MZ, Wen CF, Zhou HY, Jian JX, Tong QX. Nitrogen-doped carbon dots for efficient deep-blue light-emitting diodes with CIE closely approaching the HDTV standard color Rec.BT.709. Chem Commun (Camb) 2023. [PMID: 37401807 DOI: 10.1039/d3cc02105j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/05/2023]
Abstract
Here, we demonstrate deep-blue carbon dots (CDs) with luminescence centered at 415 nm and PLQY exceeding 60% via nitrogen doping. A bright and high-color-purity CDs-based light-emitting diode (CLED) is achieved with an external quantum efficiency (EQE) of 1.74%, a maximum luminance of 1155.0 cd m-2, and a colour coordinate (0.16, 0.08) closely approaching the HDTV standard color Rec.BT.709 (0.15, 0.06) specification.
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Affiliation(s)
- Peng Huang
- Department of Chemistry, Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province, and Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention, Shantou University, Shantou, Guangdong, 515063, China.
| | - Ming-Zhu Li
- Department of Chemistry, Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province, and Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention, Shantou University, Shantou, Guangdong, 515063, China.
| | - Chun-Fa Wen
- Department of Chemistry, Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province, and Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention, Shantou University, Shantou, Guangdong, 515063, China.
| | - Hang-Yue Zhou
- School of Chemistry & Materials Engineering, Xinxiang University, Xinxiang, Henan, 453003, China
| | - Jing-Xin Jian
- Department of Chemistry, Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province, and Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention, Shantou University, Shantou, Guangdong, 515063, China.
| | - Qing-Xiao Tong
- Department of Chemistry, Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province, and Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention, Shantou University, Shantou, Guangdong, 515063, China.
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13
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Sonkaya Ö, Ocakçı Ş, Toksoy A, Pamuk Algi M, Algi F. N-doped carbon nanomaterials as fluorescent pH and metal ion sensors for imaging. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 292:122412. [PMID: 36720189 DOI: 10.1016/j.saa.2023.122412] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 01/04/2023] [Accepted: 01/23/2023] [Indexed: 06/18/2023]
Abstract
Herein we describe the facile synthesis of new N-doped carbon nanoparticles (CNPs) obtained from 1,10-phenanthroline by the solvothermal method. Characterization of CNPs were carried out with transmission electron microscope (TEM), X-ray photoelectron spectra (XPS), Fourier transform infrared spectra (FTIR), UV-vis absorption spectra, and luminescence spectra. CNPs were pH sensitive and exploited as fluorescent chemosensors and imaging agents for Al(III) and Zn(II) ions in real-life samples. Remarkably, we show that CNPs can be used for the detection of Al(III) and Zn(II) ions in water samples. Accordingly, the results indicate that CNPs are highly effective in detecting Zn(II) content of cosmetic creams. We also demonstrated that the CNPs could be used for in vitro imaging of Al(III) and Zn(II) in Human Larynx Squamous Cell Carcinoma (Hep-2). Finally, Al(III) imaging in Angelica Officinalis root tissue was also achieved successfully. The CNPs are promising as luminescent multianalyte (pH, Al(III) and Zn(II)) sensors.
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Affiliation(s)
- Ömer Sonkaya
- Department of Chemistry & ASUBTAM M. Bilmez BioNanoTech Lab, Aksaray University, TR-68100 Aksaray, Turkey
| | - Şeyma Ocakçı
- Department of Biotechnology & ASUBTAM M. Bilmez BioNanoTech Lab, Aksaray University, TR-68100 Aksaray, Turkey
| | - Alihan Toksoy
- Department of Biotechnology & ASUBTAM M. Bilmez BioNanoTech Lab, Aksaray University, TR-68100 Aksaray, Turkey
| | - Melek Pamuk Algi
- Department of Chemistry & ASUBTAM M. Bilmez BioNanoTech Lab, Aksaray University, TR-68100 Aksaray, Turkey.
| | - Fatih Algi
- Department of Biotechnology & ASUBTAM M. Bilmez BioNanoTech Lab, Aksaray University, TR-68100 Aksaray, Turkey.
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14
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Wang X, Wu T, Yang Y, Zhou L, Wang S, Liu J, Zhao Y, Zhang M, Zhao Y, Qu H, Kong H, Zhang Y. Ultrasmall and highly biocompatible carbon dots derived from natural plant with amelioration against acute kidney injury. J Nanobiotechnology 2023; 21:63. [PMID: 36814298 PMCID: PMC9946873 DOI: 10.1186/s12951-023-01795-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 01/24/2023] [Indexed: 02/24/2023] Open
Abstract
BACKGROUND Acute kidney injury (AKI) refers to a tricky clinical disease, known by its high morbidity and mortality, with no real specific medicine for AKI. The carbonization product from Pollen Typhae (i.e., Pu-huang in China) has been extensively employed in clinic, and it is capable of relieving the renal damage and other diseases in China since acient times. RESULTS Inspired by the carbonization process of Traditional Chinese Medicine (TCM), a novel species of carbon dots derived from Pollen Typhae (PT-CDs) was separated and then collected using a one-pot pyrolysis method. The as-prepared PT-CDs (4.85 ± 2.06 nm) with negative charge and abundant oxygenated groups exhibited high solubility, and they were stable in water. Moreover, the rhabdomyolysis (RM)-induced AKI rat model was used, and it was first demonstrated that PT-CDs had significant activity in improving the level of BUN and CRE, urine volume and kidney index, and histopathological morphology in RM-induced AKI rats. It is noteworthy that interventions of PT-CDs significantly reduced degree of inflammatory reaction and oxidative stress, which may be correlated with the basial potential mechanism of anti-AKI activities. Furthermore, cytotoxicity assay and biosafety evaluation exhibited high biocompatibility of PT-CDs. CONCLUSION This study offers a novel relieving strategy for AKI based on PT-CDs and suggests its potential to be a related candidate for clinical applications.
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Affiliation(s)
- Xiaoke Wang
- grid.477982.70000 0004 7641 2271Encephalopathy Hospital, The First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, 450000 China
| | - Tong Wu
- grid.24695.3c0000 0001 1431 9176School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 100029 China
| | - Yingxin Yang
- grid.24695.3c0000 0001 1431 9176School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029 China
| | - Long Zhou
- grid.24695.3c0000 0001 1431 9176School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029 China
| | - Shuxian Wang
- grid.24695.3c0000 0001 1431 9176School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029 China
| | - Jiaxing Liu
- grid.24695.3c0000 0001 1431 9176Third Affiliated Hospital, Beijing University of Chinese Medicine, Beijing, 100029 China
| | - Yafang Zhao
- grid.24695.3c0000 0001 1431 9176School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029 China
| | - Meiling Zhang
- grid.412073.3Key Laboratory of Chinese Internal Medicine of the Ministry of Education, Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, 100020 China
| | - Yan Zhao
- grid.24695.3c0000 0001 1431 9176School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029 China
| | - Huihua Qu
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029, China. .,Center of Scientific Experiment, Beijing University of Chinese Medicine, Beijing, 100029, China.
| | - Hui Kong
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029, China.
| | - Yue Zhang
- School of Life Science, Beijing University of Chinese Medicine, Beijing, 100029, China.
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15
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Maniappan S, Reddy KL, Kumar J. Transmitting biomolecular chirality into carbon nanodots: a facile approach to acquire chiral light emission at the nanoscale. Chem Sci 2023; 14:491-498. [PMID: 36741532 PMCID: PMC9847681 DOI: 10.1039/d2sc05794h] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 11/26/2022] [Indexed: 11/29/2022] Open
Abstract
Since the observation of chirality at the nanoscale, research focused towards the design and synthesis of optically active nanomaterials has been at a brisk pace. In this regard, carbon based zero dimensional nanomaterials have attracted vast attention due to their rich optical properties, abundance of raw materials, minimal environmental hazardousness, good solubility, and ease of surface modification. However, efforts focused towards the synthesis of chiral carbon nanodots exhibiting optical activity both in their ground and excited states are rather scarce. Herein, we report a facile synthetic approach for the preparation of three sets of intrinsically chiral carbon nanodots that exhibit intense circularly polarized luminescence. Synthesis under optimized conditions using l- and d-isomers of the chiral precursors led to the formation of carbon nanodots that displayed mirror image circular dichroism and circularly polarized luminescence signals revealing their ground and excited state chirality. The experimental results are supportive of the reported core-shell model comprising an achiral carbon core that is enclosed within an amorphous shell contributing to the chiral luminescence. The luminescence anisotropy and wavelength could be tuned by varying the experimental conditions such as temperature and pH. The chiral emissive properties of the nanoparticles could be demonstrated in free-standing polymeric films revealing their potential to be used as chiral light emitting agents in optical devices, data storage and security tags. Being the first observation of intrinsic circularly polarized luminescence from a range of carbon nanodots, both in the solution and solid state, we envisage that the work will open new avenues for the investigation of excited stated chirality at the nanoscale.
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Affiliation(s)
- Sonia Maniappan
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) TirupatiTirupati – 517507India
| | - Kumbam Lingeshwar Reddy
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) TirupatiTirupati – 517507India
| | - Jatish Kumar
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) TirupatiTirupati – 517507India
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16
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Stan L, Volf I, Stan CS, Albu C, Coroaba A, Ursu LE, Popa M. Intense Blue Photo Emissive Carbon Dots Prepared through Pyrolytic Processing of Ligno-Cellulosic Wastes. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 13:131. [PMID: 36616041 PMCID: PMC9824800 DOI: 10.3390/nano13010131] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 12/15/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
In this work, Carbon Dots with intense blue photo-luminescent emission were prepared through a pyrolytic processing of forestry ligno-cellulosic waste. The preparation path is simple and straightforward, mainly consisting of drying and fine grinding of the ligno-cellulosic waste followed by thermal exposure and dispersion in water. The prepared Carbon Dots presented characteristic excitation wavelength dependent emission peaks ranging within 438-473 nm and a remarkable 28% quantum yield achieved at 350 nm excitation wavelength. Morpho-structural investigations of the prepared Carbon Dots were performed through EDX, FT-IR, Raman, DLS, XRD, and HR-SEM while absolute PLQY, steady state, and lifetime fluorescence were used to highlight their luminescence properties. Due to the wide availability of this type of ligno-cellulosic waste, an easy processing procedure achieved photo-luminescent properties, and the prepared Carbon Dots could be an interesting approach for various applications ranging from sensors, contrast agents for biology investigations, to photonic conversion mediums in various optoelectronic devices. Additionally, their biocompatibility and waste valorization in new materials might be equally good arguments in their favor, bringing a truly "green" approach.
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Affiliation(s)
- Loredana Stan
- Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi“ Technical University, D. Mangeron 73 Ave., 700050 Iasi, Romania
| | - Irina Volf
- Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi“ Technical University, D. Mangeron 73 Ave., 700050 Iasi, Romania
| | - Corneliu S. Stan
- Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi“ Technical University, D. Mangeron 73 Ave., 700050 Iasi, Romania
| | - Cristina Albu
- Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi“ Technical University, D. Mangeron 73 Ave., 700050 Iasi, Romania
| | - Adina Coroaba
- Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry of Romanian Academy, Grigore Ghica Voda 41A Alley, 700487 Iasi, Romania
| | - Laura E. Ursu
- Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry of Romanian Academy, Grigore Ghica Voda 41A Alley, 700487 Iasi, Romania
| | - Marcel Popa
- Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi“ Technical University, D. Mangeron 73 Ave., 700050 Iasi, Romania
- Academy of Romanian Scientists, Ilfov Street, 077160 Bucharest, Romania
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17
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Graphene quantum dots: synthesis, properties, and applications to the development of optical and electrochemical sensors for chemical sensing. Mikrochim Acta 2022; 189:258. [PMID: 35701638 DOI: 10.1007/s00604-022-05353-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 05/24/2022] [Indexed: 10/18/2022]
Abstract
GQDs exhibits exceptional electrochemical activity owing to their active edge sites that make them very attractive for biosensing applications. However, their use in the design of new biosensing devices for application to the detection and quantification of toxins, pathogens, and clinical biomarkers has so far not investigated in detail. In this regard, herein we provide a detailed review on various methodologies employed for the synthesis of GQDs, including bottom-up and top-down approaches, with a special focus on their applications in biosensing via fluorescence, photoluminescence, chemiluminescence, electrochemiluminescence, fluorescence resonance energy transfer, and electrochemical techniques. We believe that this review will shed light on the critical issues and widen the applications of GQDs for the design of biosensors with improved analytical response for future applications. HIGHLIGHTS: • Properties of GQDs play a critical role in biosensing applications. • Synthesis of GQDs using top-down and bottom-up approaches is discussed comprehensively. • Overview of advancements in GQD-based sensors over the last decade. • Methods for the design of selective and sensitive GQD-based sensors. • Challenges and opportunities for future GQD-based sensors.
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