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Sun X, Qiao Y, Li W, Sui Y, Ruan Y, Xiao J. A graphene oxide-aided triple helical aggregation-induced emission biosensor for highly specific detection of charged collagen peptides. J Mater Chem B 2020; 8:6027-6033. [PMID: 32568343 DOI: 10.1039/d0tb00476f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Aggregation-induced emission (AIE) probes have emerged as promising "turn-on" sensing tools for DNA and proteins, and the AIE biosensors conjugated with graphene oxide (GO) have shown improved selectivity. Collagen is an essential structural protein in the human body, and its degraded products are involved in a plethora of severe diseases. Collagen has a high content of charged amino acids, while EOG represents one of the most abundant charged triplets in Type I collagen. We, herein, for the first time report the construction of a GO-aided AIE biosensor for the detection of charged collagen peptides. We have shown that an AIE fluorophore TPE conjugated with a triple helical peptide TPE-PRG possesses strong fluorescence due to the restriction of intramolecular rotation of TPE in the trimer state. The adsorption of the probe TPE-PRG by GO leads to efficient fluorescence quenching, while the addition of target collagen peptide EOG releases the probe peptide from the GO surface and recovers its fluorescence. We have demonstrated that the TPE-PRG/GO complex provides a highly specific "turn-on" sensing platform for the target collagen peptide with a typical charged amino acid-rich sequence. The assay has shown little interference from other biomolecules, and it can also effectively distinguish the target charged collagen peptide from its single amino acid mutant type. The development of robust analytical assays for charged collagen peptides could pronouncedly extend our capability to investigate the pathology of collagen diseases, showing great potential for their molecular diagnosis.
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Affiliation(s)
- Xiuxia Sun
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
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Murali A, Sampath S, Appukutti Achuthan B, Sakar M, Chandrasekaran S, Suthanthira Vanitha N, Joseph Bensingh R, Abdul Kader M, Jaisankar SN. Copper (0) Mediated Single Electron Transfer-Living Radical Polymerization of Methyl Methacrylate: Functionalized Graphene as a Convenient Tool for Radical Initiator. Polymers (Basel) 2020; 12:E874. [PMID: 32290159 PMCID: PMC7240427 DOI: 10.3390/polym12040874] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 03/11/2020] [Accepted: 03/18/2020] [Indexed: 01/27/2023] Open
Abstract
Polymer nanocomposites have been synthesized by the covalent addition of bromide-functionalized graphene (Graphene-Br) through the single electron transfer-living radical polymerization technique (SET-LRP). Graphite functionalized with bromide for the first time via an efficient route using mild reagents has been designed to develop a graphene based radical initiator. The efficiency of sacrificial initiator (ethyl α-bromoisobutyrate) has also been compared with a graphene based initiator towards monitoring their Cu(0) mediated controlled molecular weight and morphological structures through mass spectroscopy (MOLDI-TOF) and field emission scanning electron microscopy (FE-SEM) analysis, respectively. The enhancement in thermal stability is observed for graphene-grafted-poly(methyl methacrylate) (G-g-PMMA) at 392 °C, which may be due to the influence ofthe covalent addition of graphene, whereas the sacrificial initiator used to synthesize G-graft-PMMA (S) has low thermal stability as analyzed by TGA. A significant difference is noticed on their glass transition and melting temperatures by DSC. The controlled formation and structural features of the polymer-functionalized-graphene is characterized by Raman, FT-IR, UV-Vis spectroscopy, NMR, and zeta potential measurements. The wettability measurements of the novel G-graft-PMMA on leather surface were found to be better in hydrophobic nature with a water contact angle of 109 ± 1°.
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Affiliation(s)
- Adhigan Murali
- School for Advanced Research in Polymers (SARP)-Advanced Research School for Technology and Product Simulation (ARSTPS), Central Institute of Plastics Engineering & Technology (CIPET), Ministry of Chemicals & Fertilizers, Govt. of India, Chennai 600032, India; (R.J.B.); (M.A.K.)
| | - Srinivasan Sampath
- Department of Materials Science, School of Technology, Central University of Tamil Nadu, Thiruvarur 610101, India;
| | - Boopathi Appukutti Achuthan
- Polymer Science and Technology Division, Council of Scientific and Industrial Research (CSIR)-Central Leather Research Institute (CLRI), Adyar, Chennai 600020, India; (B.A.A.); (S.N.J.)
| | - Mohan Sakar
- Centre for Nano and Material Sciences, Jain University, Bangalore 562112, Karnataka, India
| | | | - N. Suthanthira Vanitha
- Department of Electrical & Electronics Engineering, Muthayammal Engineering College (Autonomous), Namakkal 637408, Tamilnadu, India;
| | - R. Joseph Bensingh
- School for Advanced Research in Polymers (SARP)-Advanced Research School for Technology and Product Simulation (ARSTPS), Central Institute of Plastics Engineering & Technology (CIPET), Ministry of Chemicals & Fertilizers, Govt. of India, Chennai 600032, India; (R.J.B.); (M.A.K.)
| | - M. Abdul Kader
- School for Advanced Research in Polymers (SARP)-Advanced Research School for Technology and Product Simulation (ARSTPS), Central Institute of Plastics Engineering & Technology (CIPET), Ministry of Chemicals & Fertilizers, Govt. of India, Chennai 600032, India; (R.J.B.); (M.A.K.)
| | - Sellamuthu N. Jaisankar
- Polymer Science and Technology Division, Council of Scientific and Industrial Research (CSIR)-Central Leather Research Institute (CLRI), Adyar, Chennai 600020, India; (B.A.A.); (S.N.J.)
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Li Z, Chang PH, Jiang WT, Liu Y. Enhanced removal of ethidium bromide (EtBr) from aqueous solution using rectorite. JOURNAL OF HAZARDOUS MATERIALS 2020; 384:121254. [PMID: 31586911 DOI: 10.1016/j.jhazmat.2019.121254] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 09/03/2019] [Accepted: 09/17/2019] [Indexed: 05/07/2023]
Abstract
Ethidium bromide (EtBr) is an intercalating agent commonly used as nucleic acid fluorescent tag in various techniques of life science field. It is considered as a serious biohazard due to its mutagenicity and carcinogenicity. As such, developing high efficiency and low cost materials as cleanup kits is in urgent need although many methods have already been developed. In this study we take use of the affinity of organic cations for clay minerals of high cation exchange capacity (CEC) and large specific surface area (SSA) and tested the removal of EtBr using rectorite, a type of clay mineral made of 1:1 regularly mixed layers of illite and montmorillonite. Our results showed that the uptake of Et+ on rectorite could be as high as 400 mmol/kg and the removal of Et+ was extremely fast. Desorption of inorganic cation Ca2+ and sorption of counterion Br- revealed that cation exchange was the dominating mechanism of Et+ removal using rectorite. Thermal analyses revealed that the EtBr could be thermally destructed inside the interlayer of rectorite and the material could be thermally regenerated. Thus, clay minerals could have a great potential to be fabricated into cleanup kits for the removal of EtBr in case of spill.
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Affiliation(s)
- Zhaohui Li
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, 29 Xueyuan Road, Beijing, 100083, China; Department of Earth Sciences, National Cheng Kung University, 1 University Road, Tainan 70101, Taiwan; Department of Geosciences, University of Wisconsin - Parkside, 900 Wood Road, Kenosha, WI 53144, USA.
| | - Po-Hsiang Chang
- Department of Earth Sciences, National Cheng Kung University, 1 University Road, Tainan 70101, Taiwan
| | - Wei-Teh Jiang
- Department of Earth Sciences, National Cheng Kung University, 1 University Road, Tainan 70101, Taiwan.
| | - Yujuan Liu
- Department of Chemistry, University of Wisconsin - Parkside, 900 Wood Road, Kenosha, WI 53144, USA
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Sulfur and nitrogen doped carbon quantum dots for detection of glutathione and reduction of cellular nitric oxide in microglial cells. JOURNAL OF PHARMACEUTICAL INVESTIGATION 2020. [DOI: 10.1007/s40005-019-00466-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Karki N, Tiwari H, Pal M, Chaurasia A, Bal R, Joshi P, Sahoo NG. Functionalized graphene oxides for drug loading, release and delivery of poorly water soluble anticancer drug: A comparative study. Colloids Surf B Biointerfaces 2018; 169:265-272. [PMID: 29783152 DOI: 10.1016/j.colsurfb.2018.05.022] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 05/05/2018] [Accepted: 05/07/2018] [Indexed: 11/25/2022]
Abstract
In this work, the modification of graphene oxides (GOs) have been done with hydrophilic and biodegradable polymer, polyvinylpyrrolidone (PVP) and other excipient β -cyclodextrin (β-CD) through covalent functionalization for efficient loading and compatible release of sparingly water soluble aromatic anticancer drug SN-38 (7-ethyl-10-hydroxy camptothecin). The drug was loaded onto both GO-PVP and GO-β-CD through the π-π interactions.The release of drug from both the nanocarriers were analyzed in different pH medium of pH 7 (water, neutral medium), pH 5 (acidic buffer) and pH 12 (basic buffer). The loading capacity and the cell killing activity of SN-38 loaded on functionalized GO were investigated comprehensively in human breast cancer cells MCF-7.Our findings shown that the cytotoxicity of SN-38 loaded to the polymer modified GO was comparatively higher than free SN-38. In particular, SN-38 loaded GO-PVP nanocarrier has more cytotoxic effect than GO-β-CD nanocarrier against MCF-7 cells, indicating that SN-38 loaded GO-PVP nanocarrier can be used as promising material for drug delivery and biological applications.
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Affiliation(s)
- Neha Karki
- Nanoscience and Nanotechnology Centre, Department of Chemistry, D.S.B. Campus, Kumaun University, Nainital, Uttarakhand, India
| | - Himani Tiwari
- Nanoscience and Nanotechnology Centre, Department of Chemistry, D.S.B. Campus, Kumaun University, Nainital, Uttarakhand, India
| | - Mintu Pal
- Biotechnology Group, Biological Sciences and Technology Division, CSIR-North East Institute of Science and Technology, Academy of Scientific and Innovative Research, Jorhat, Assam, India
| | | | - Rajaram Bal
- Conversion & Catalysis Division, CSIR-Indian Institute of Petroleum, Dehradun, India
| | - Penny Joshi
- Nanoscience and Nanotechnology Centre, Department of Chemistry, D.S.B. Campus, Kumaun University, Nainital, Uttarakhand, India
| | - Nanda Gopal Sahoo
- Nanoscience and Nanotechnology Centre, Department of Chemistry, D.S.B. Campus, Kumaun University, Nainital, Uttarakhand, India.
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Jhonsi MA, Ananth DA, Nambirajan G, Sivasudha T, Yamini R, Bera S, Kathiravan A. Antimicrobial activity, cytotoxicity and DNA binding studies of carbon dots. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 196:295-302. [PMID: 29459160 DOI: 10.1016/j.saa.2018.02.030] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Revised: 02/06/2018] [Accepted: 02/07/2018] [Indexed: 05/03/2023]
Abstract
In recent years, quantum dots (QDs) are one of the most promising nanomaterials in life sciences community due to their unexploited potential in biomedical applications; particularly in bio-labeling and sensing. In the advanced nanomaterials, carbon dots (CDs) have shown promise in next generation bioimaging and drug delivery studies. Therefore the knowledge of the exact nature of interaction with biomolecules is of great interest to designing better biosensors. In this study, the interaction between CDs derived from tamarind and calf thymus DNA (ct-DNA) has been studied by vital spectroscopic techniques, which revealed that the CDs could interact with DNA via intercalation. The apparent association constant has been deduced from the absorption spectral changes of ct-DNA-CDs using the Benesi-Hildebrand equation. From the DNA induced emission quenching experiments the apparent DNA binding constant of the CDs (Kapp) have also been evaluated. Furthermore, we have analyzed the antibacterial and antifungal activity of CDs using disc diffusion assay method which exhibited excellent activity against E. coli and C. albicans with inhibition zone in the range of 7-12mm. The biocompatible nature of CDs was confirmed by an in vitro cytotoxicity test on L6 normal rat myoblast cells by using MTT assay. The cell viability is not affected till the high dosage of CDs (200μg/mL) for >48h. As a consequence of the work, future development of CDs for microbial control and DNA sensing among the various biomolecules is possible in view of emerging biofields.
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Affiliation(s)
- Mariadoss Asha Jhonsi
- Department of Chemistry, B. S. Abdur Rahman Crescent Institute of Science and Technology, Chennai 600 048, Tamil Nadu, India.
| | - Devanesan Arul Ananth
- Department of Environmental Biotechnology, Bharathidasan University, Tiruchirappalli, Tamil Nadu 620 024, India
| | - Gayathri Nambirajan
- Department of Environmental Biotechnology, Bharathidasan University, Tiruchirappalli, Tamil Nadu 620 024, India
| | - Thilagar Sivasudha
- Department of Environmental Biotechnology, Bharathidasan University, Tiruchirappalli, Tamil Nadu 620 024, India
| | - Rekha Yamini
- School of Life Sciences, B. S. Abdur Rahman Crescent Institute of Science and Technology, Chennai 600 048, Tamil Nadu, India
| | - Soumen Bera
- School of Life Sciences, B. S. Abdur Rahman Crescent Institute of Science and Technology, Chennai 600 048, Tamil Nadu, India
| | - Arunkumar Kathiravan
- National Centre for Ultrafast Processes, University of Madras, Taramani Campus, Chennai 600 113, Tamil Nadu, India
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Karmakar A, Mallick T, Das S, Begum NA. Naturally occurring green multifunctional agents: Exploration of their roles in the world of graphene and related systems. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.nanoso.2017.10.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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9
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Bayraktutan T, Meral K. Merocyanine 540 adsorbed on polyethylenimine-functionalized graphene oxide nanocomposites as a turn-on fluorescent sensor for bovine serum albumin. Phys Chem Chem Phys 2016; 18:23400-6. [DOI: 10.1039/c6cp04275a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
We suggest a simple, fast, sensitive and selective BSA sensor designed by assembling MC540 molecules on PEI–GO nanocomposites.
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Affiliation(s)
- Tuğba Bayraktutan
- Department of Chemistry
- Faculty of Sciences
- Atatürk University
- 25240 Erzurum
- Turkey
| | - Kadem Meral
- Department of Chemistry
- Faculty of Sciences
- Atatürk University
- 25240 Erzurum
- Turkey
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10
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Sun X, Fan J, Ye W, Zhang H, Cong Y, Xiao J. A highly specific graphene platform for sensing collagen triple helix. J Mater Chem B 2016; 4:1064-1069. [DOI: 10.1039/c5tb02218e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have designed a dye-labeled, highly positively charged single stranded collagen (ssCOL) peptide probe whose adsorption into GO quenches its fluorescence. The hybridization of the ssCOL probe with a complementary target sequence forms a triple stranded collagen (tsCOL) peptide, resulting in the retention of the fluorescence of the probe.
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Affiliation(s)
- Xiuxia Sun
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Jun Fan
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Weiran Ye
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Han Zhang
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Yong Cong
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Jianxi Xiao
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
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11
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Cai X, Yang Q, Ding J, Ye W, Li X, Xiao J. Paper-based FRET for the direct detection of collagen triple helix. J Mater Chem B 2016; 4:7009-7013. [DOI: 10.1039/c6tb01901c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The integration of the GO-based FRET assay with a patterned paper provides a powerful new tool for the detection of collagen molecules with many superior features: tiny volumes of samples, multichannel detection mode, easy operation and low-cost equipment.
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Affiliation(s)
- Xiangdong Cai
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Qiuxia Yang
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Jiamin Ding
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Weiran Ye
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Xuan Li
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Jianxi Xiao
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
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A graphene oxide-based FRET sensor for rapid and specific detection of unfolded collagen fragments. Biosens Bioelectron 2015; 79:15-21. [PMID: 26686918 DOI: 10.1016/j.bios.2015.12.004] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Revised: 11/16/2015] [Accepted: 12/02/2015] [Indexed: 11/21/2022]
Abstract
The unstructured collagen species plays a critical role in a variety of important biological processes as well as pathological conditions. In order to develop novel diagnosis and therapies for collagen-related diseases, it is essential to construct simple and efficient methods to detect unfolded collagen fragments. We therefore have designed a FITC-labeled collagen mimic triple helical peptide, whose adsorption on the surface of GO effectively quenches its fluorescence. The newly constructed GO/FITC-GPO complex specifically detects unstructured collagen fragments, but not fully folded triple helix species. The detection shows a clear preference for the collagen targets with complementary GPO-rich sequences. The conformation-sensitive, sequence-specific GO-based approach can be applied as an efficient biosensor for rapid detection of unfolded collagen fragments at nM level, and may have great potential in drug screening for inhibitors of unfolded collagen. It may provide a prototype to develop GO-based assays to detect other important unstructured proteins involved in diseases.
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Huynh VT, Nguyen D, Such CH, Hawkett BS. Polymer coating of graphene oxide via reversible addition-fragmentation chain transfer mediated emulsion polymerization. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pola.27596] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Vien T. Huynh
- Key Centre for Polymers and Colloids, School of Chemistry, Faculty of Science, Chemistry Building F11, University of Sydney; Sydney New South Wales 2006 Australia
| | - Duc Nguyen
- Key Centre for Polymers and Colloids, School of Chemistry, Faculty of Science, Chemistry Building F11, University of Sydney; Sydney New South Wales 2006 Australia
| | - Christopher H. Such
- DuluxGroup (Australia); 1970 Princess Highway Clayton Victoria 3168 Australia
| | - Brian S. Hawkett
- Key Centre for Polymers and Colloids, School of Chemistry, Faculty of Science, Chemistry Building F11, University of Sydney; Sydney New South Wales 2006 Australia
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Abstract
In this critical review, we present the recent advances in the design and fabrication of graphene/nucleic acid nanobiointerfaces, as well as the fundamental understanding of their interfacial properties and various nanobiotechnological applications.
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Affiliation(s)
- Longhua Tang
- State Key Laboratory of Modern Optical Instrumentation
- Department of Optical Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Ying Wang
- Department of Chemistry
- Shanghai Key Laboratory of Chemical Assessment and Sustainability
- UNEP-Tongji Institute of Environment for Sustainable Development
- Tongji University
- Shanghai
| | - Jinghong Li
- Department of Chemistry
- Beijing Key Laboratory for Microanalytical Methods and Instrumentation
- Tsinghua University
- Beijing 100084
- China
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Kundu A, Nandi S, Layek RK, Nandi AK. Fluorescence resonance energy transfer from sulfonated graphene to riboflavin: a simple way to detect vitamin B2. ACS APPLIED MATERIALS & INTERFACES 2013; 5:7392-7399. [PMID: 23838272 DOI: 10.1021/am4017208] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We have prepared sulfonated graphene (SG) by diazonium coupling technique and it has been characterized by UV-vis absorption spectroscopy, Raman spectroscopy, electron microscopy, energy-dispersive spectroscopy (EDS), EDS elemental mapping, X-ray photoelectron spectroscopy (XPS), and FTIR spectroscopy. The photoluminescence (PL) property of SG at different pH (pH 4, 7, and 9.2) has been investigated and SG shows highest PL-intensity and quantum yield at pH 4 compared to those at higher pH and that of GO at pH 4. Due to the strong overlap between the emission spectrum of SG and absorption spectrum of riboflavin (RF, vitamin B2) at pH 4, it has been tactfully used as donor for the fluorescence resonance energy transfer (FRET) process. However, graphene oxide (GO) does not exhibit any FRET with RF at an identical condition due to its much lower quantum yield. We have demonstrated a selective detection of vitamin B2 in presence of nucleic acid (DNA, RNA), protein (BSA), amino acid (Lysine) and other water-soluble vitamins (Becosules, Zevit capsules) based on the spontaneous FRET from PL-active SG (donor) to RF (acceptor). The calibration curve indicates excellent affirmation to detect vitamin B2 using FRET and it is superior to the ordinary fluorescence method of detecting RF in presence of different biomolecules.
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Affiliation(s)
- Aniruddha Kundu
- Polymer Science Unit, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700 032, India
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