1
|
Yapa P, Munaweera I, Weerasekera MM, Weerasinghe L, Sandaruwan C. Potential antifungal applications of heterometallic silica nanohybrids: A synergistic activity. BIOMATERIALS ADVANCES 2024; 162:213930. [PMID: 38909600 DOI: 10.1016/j.bioadv.2024.213930] [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: 04/16/2024] [Revised: 05/21/2024] [Accepted: 06/18/2024] [Indexed: 06/25/2024]
Abstract
An estimated 1.7 million fatalities and 150 million cases worldwide are attributed to fungal infections annually, that are in rise due to immunocompromised patient population. The challenges posed by traditional treatments can be addressed with the help of nanotechnology advancements. In this study, Co, Cu, and Ag-were doped into silica nanoparticles. Then the synthesized monometallic silica nanohybrids were combined to formulate heterometallic silica nanohybrids, characterized structurally and morphologically, compared, and evaluated for antifungal activity based on their individual and synergistic activity. The antifungal assays were conducted by using ATCC cultures of Candida albicans and QC samples of Trichophyton rubrum, Microsporum gypseum, and Aspergillus niger. The MIC (ranging from 49.00 to 1560.00 μg/mL), MFC (ranging from 197.00 to 3125.00 μg/mL), IC50 values (ranging from 31.10 to 400.80 μg/mL), and FICI of nanohybrids were determined and compared. Moreover, well diffusion assay was performed. ABTS assay and DPPH assay were conducted to investigate the radical scavenging activity (RSA) of nanohybrids. SEM analysis clearly evidenced the structural deformations of each fungal cells and spores due to the treatment with trimetallic nanohybrid. According to the results, the trimetallic silica nanohybrids exhibited the most powerful synergistic RSA and the most effective antifungal activity, compared to the bimetallic silica nanohybrids.
Collapse
Affiliation(s)
- Piumika Yapa
- Department of Chemistry, Faculty of Applied Sciences, University of Sri Jayewardenepura, Nugegoda 10250, Sri Lanka
| | - Imalka Munaweera
- Department of Chemistry, Faculty of Applied Sciences, University of Sri Jayewardenepura, Nugegoda 10250, Sri Lanka.
| | - Manjula M Weerasekera
- Department of Microbiology, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda 10250, Sri Lanka
| | - Laksiri Weerasinghe
- Department of Chemistry, Faculty of Applied Sciences, University of Sri Jayewardenepura, Nugegoda 10250, Sri Lanka
| | - Chanaka Sandaruwan
- Sri Lanka Institute of Nanotechnology (SLINTEC), Homagama 10200, Sri Lanka; Department of Aerospace Engineering, Khalifa University of Science & Technology, 127788, Abu Dhabi, United Arab Emirates
| |
Collapse
|
2
|
Yapa PN, Munaweera I, Sandaruwan C, Weerasinghe L, Weerasekera MM. Metal doped silica nanohybrids with extensive bacterial coverage for antibacterial applications exhibit synergistic activity. BIOMATERIALS ADVANCES 2024; 157:213753. [PMID: 38160632 DOI: 10.1016/j.bioadv.2023.213753] [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: 10/21/2023] [Revised: 12/20/2023] [Accepted: 12/21/2023] [Indexed: 01/03/2024]
Abstract
Nanotechnology has triumphantly overcome several barriers that have formed in modern life. Bacterial infections are a critical public health issue. They emphasized the failure of conventional treatments, high mortality and morbidity rates, antibiotic resistance, and other factors leading to the development of novel and affordable antibacterial medications. In this study, three types of metals (Ag, Cu, and Co) were doped separately into a silanol network in silica nanoparticles. The synthesized monometallic nanohybrids were combined in equal proportions to formulate bi and trimetallic nanohybrids. They were characterized structurally and morphologically. Fourier transform infrared (FTIR) and Raman spectroscopy studies were used to investigate the formation of the bonds and the pertinent peak positions. X-ray diffractograms (XRD) validated the crystalline structures of the metal nanohybrids. X-ray photoelectron spectroscopic study (XPS) confirmed the successful addition of metals to the silanol network. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images were used to characterize the morphology of nanohybrids and demonstrate their dimensions are on the nanoscale. The fraction of each metal doped in the silanol network was determined using energy dispersive spectroscopy (EDS) and atomic absorption spectrometry (AAS). To assess activity and confirm antibacterial synergy, the antibacterial activity of all synthesized nanohybrids was examined. The minimum inhibitory concentration-MIC (Ranged from 12.25 to 1560.00 μg/mL), minimum bactericidal concentration-MBC (Ranged from 197.00 to 3125.00 μg/mL), IC50 values (Ranged from 30.56 to 1683.00 μg/mL-) and fractional inhibitory concentration index (FICI) were determined and compared. Well diffusion assay was conducted against both ATCC cultures and clinical samples of gram-positive bacteria; Staphylococcus aureus (ATCC 25923), Streptococcus pneumoniae (ATCC 49619), MRSA (ATCC 33591) and gram-negative bacteria; Escherichia coli (ATCC 25922), Klebsiella pneumoniae (ATCC BAA 1706) and Pseudomonas aeruginosa (ATCC 27853). The highest synergistic radical scavenging performance of trimetallic nanohybrid (90.67 ± 0.095 %) was established by the DPPH (2,2 diphenyl-1-picrylhydrazil) experiment. Finally, when compared to monometallic nanohybrids, it was demonstrated that the synthesized multimetallic nanohybrids have a substantial potential as an emerging and cost-effective antibacterial agent.
Collapse
Affiliation(s)
- P N Yapa
- Department of Chemistry, Faculty of Applied Sciences, University of Sri Jayewardenepura, Nugegoda 10250, Sri Lanka
| | - I Munaweera
- Department of Chemistry, Faculty of Applied Sciences, University of Sri Jayewardenepura, Nugegoda 10250, Sri Lanka.
| | - C Sandaruwan
- Sri Lanka Institute of Nanotechnology (SLINTEC), Homagama 10200, Sri Lanka
| | - L Weerasinghe
- Department of Chemistry, Faculty of Applied Sciences, University of Sri Jayewardenepura, Nugegoda 10250, Sri Lanka
| | - M M Weerasekera
- Department of Microbiology, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda 10250, Sri Lanka
| |
Collapse
|
3
|
Innocenzi P. Mesoporous ordered films via self-assembly: trends and perspectives. Chem Sci 2022; 13:13264-13279. [PMID: 36507165 PMCID: PMC9682886 DOI: 10.1039/d2sc04828k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 10/07/2022] [Indexed: 12/15/2022] Open
Abstract
The synthesis of ordered mesoporous films via self-assembly represents one of the main accomplishments in nanoscience. In fact, controlling the complex chemical-physical phenomena that govern the process triggered by the solvent's fast evaporation during film deposition has represented a challenging task. Several years after the first articles on the subject, the research in the field entered a new stage. New advanced applications based on the peculiar properties of mesoporous films are envisaged while basic research is still going on, especially to clarify the mechanism behind self-organization in a spatially defined environment and the physics and chemistry in mesoscale porosity. This review has been dedicated to analysing the main trends in the fields and the perspective for future developments.
Collapse
Affiliation(s)
- Plinio Innocenzi
- Laboratory of Materials Science and Nanotechnology (LMNT), Department of Biomedical Sciences, CR-INSTM, University of SassariViale San Pietro 43/BSassari 07100Italy,Department of Chemistry, University of United Arab Emirates, Al Ain. United Arab EmiratesUnited Arab Emirates
| |
Collapse
|
4
|
Quach Q, Abdel-Fattah TM. Silver Nanoparticles Functionalized Nanosilica Grown over Graphene Oxide for Enhancing Antibacterial Effect. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12193341. [PMID: 36234470 PMCID: PMC9565893 DOI: 10.3390/nano12193341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 09/20/2022] [Accepted: 09/20/2022] [Indexed: 05/14/2023]
Abstract
The continuous growth of multidrug-resistant bacteria due to the overuse of antibiotics and antibacterial agents poses a threat to human health. Silver nanoparticles, silica-based materials, and graphene-based materials have become potential antibacterial candidates. In this study, we developed an effective method of enhancing the antibacterial property of graphene oxide (GO) by growing nanosilica (NS) of approximately 50 nm on the graphene oxide (GO) surface. The structures and compositions of the materials were characterized through powdered X-ray diffraction (P-XRD), transmission electron microscopy (TEM), scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEM-EDS), ultraviolet-visible spectroscopy (UV-VIS), dynamic light scattering (DLS), Raman spectroscopy (RM), Fourier-transform infrared spectroscopy (FTIR), Brunauer-Emmet-Teller (BET) surface area, and pore size determination. The silver nanoparticles (AgNPs) with an average diameter of 26 nm were functionalized on the nanosilica (NS) surface. The composite contained approximately 3% of silver nanoparticles. The silver nanoparticles on nanosilica supported over graphene oxide (GO/NS/AgNPs) exhibited a 7-log reduction of Escherichia coli and a 5.2-log reduction of Bacillus subtilis within one hour of exposure. Both GO/NS and GO/NS/AgNPs exhibited substantial antimicrobial effects against E. coli and B. subtilis.
Collapse
|
5
|
Applications of Spectroscopic Techniques for Characterization of Polymer Nanocomposite: A Review. J Inorg Organomet Polym Mater 2022. [DOI: 10.1007/s10904-022-02461-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
|
6
|
Sustainable Remedy Waste to Generate SiO2 Functionalized on Graphene Oxide for Removal of U(VI) Ions. SUSTAINABILITY 2022. [DOI: 10.3390/su14052699] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The Hummer process is applied to generate graphene oxide from carbon stocks’ discharged Zn-C batteries waste. SiO2 is produced from rice husks through the wet process. Subsequently, SiO2 reacted with graphene oxide to form silica/graphene oxide (SiO2/GO) as a sorbent material. XRD, BET, SEM, EDX, and FTIR were employed to characterize SiO2/GO. Factors affecting U(VI) sorption on SiO2/GO, including pH, sorption time, a dosage of SiO2/GO, U(VI) ions’ concentration, and temperature, were considered. The experimental data consequences indicated that the uptake capacity of SiO2/GO towards U(VI) is 145.0 mg/g at a pH value of 4.0. The kinetic calculations match the pseudo second-order model quite well. Moreover, the sorption isotherm is consistent with the Langmuir model. The sorption procedures occur spontaneously and randomly, as well as exothermically. Moreover, SiO2/GO has essentially regenerated with a 0.8 M H2SO4 and 1:50 S:L phase ratio after 60 min of agitation time. Lastly, the sorption and elution were employed in seven cycles to check the persistent usage of SiO2/GO.
Collapse
|
7
|
Thakkar S, De Luca L, Gaspa S, Mariani A, Garroni S, Iacomini A, Stagi L, Innocenzi P, Malfatti L. Comparative Evaluation of Graphene Nanostructures in GERS Platforms for Pesticide Detection. ACS OMEGA 2022; 7:5670-5678. [PMID: 35224328 PMCID: PMC8867560 DOI: 10.1021/acsomega.1c04863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 12/22/2021] [Indexed: 06/14/2023]
Abstract
Graphene-enhanced Raman scattering (GERS) produces enhancement of the Raman signal, which is based on chemical rather than electromagnetic mechanism such as in the surface-enhanced Raman scattering. Graphene oxide, amino- and guanidine-functionalized graphene oxide, exfoliated graphene, and commercial graphene nanoplatelets have been used to investigate the GERS response with the change of graphene properties. Different graphene nanostructures have been embedded into organic-inorganic microporous films to build a platform for the fast and sensitive detection of pesticides in water. The graphene nanostructures vary in the number of layers, lateral size, degree of oxidation, and surface functionalization. The GERS performances of the graphene nanostructures cast on silicon substrates and embedded in the nanocomposite films have been comparatively evaluated. After casting a few droplets of the pesticide aqueous solution on the graphene nanostructures, the Raman band enhancements of the analytes have been measured. In the nanocomposite films, the characteristic Raman bands originating from pesticides such as paraoxon, parathion, and glyphosate could be traced at concentrations below 10-7, 10-5, and 10-4 M, respectively. The results show that the surface functionalization reduces the GERS effect because it increases the ratio between the sp3 carbon and sp2 carbon. On the other hand, the comparison among different types of graphenes shows that the monolayers are more efficient than the few-layer nanostructures in enhancing the Raman signal.
Collapse
Affiliation(s)
- Swapneel Thakkar
- LMNT,
CR-INSTM, Department of Biomedical Sciences, University of Sassari, Viale S. Pietro, 43c, 07100 Sassari SS, Italy
| | - Lidia De Luca
- Department
of Chemistry and Pharmacy, University of
Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Silvia Gaspa
- Department
of Chemistry and Pharmacy, University of
Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Alberto Mariani
- Department
of Chemistry and Pharmacy, University of
Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Sebastiano Garroni
- Department
of Chemistry and Pharmacy, University of
Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Antonio Iacomini
- Department
of Chemistry and Pharmacy, University of
Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Luigi Stagi
- LMNT,
CR-INSTM, Department of Biomedical Sciences, University of Sassari, Viale S. Pietro, 43c, 07100 Sassari SS, Italy
- Department
of Chemistry and Pharmacy, University of
Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Plinio Innocenzi
- LMNT,
CR-INSTM, Department of Biomedical Sciences, University of Sassari, Viale S. Pietro, 43c, 07100 Sassari SS, Italy
| | - Luca Malfatti
- LMNT,
CR-INSTM, Department of Biomedical Sciences, University of Sassari, Viale S. Pietro, 43c, 07100 Sassari SS, Italy
| |
Collapse
|
8
|
He Y, Wen M, Zhou X, Gao F, Lu H. Rapid Characterization of Proteinaceous Binders Used in Artwork and Cultural Heritage Materials by Surface-Enhanced Raman Spectroscopy (SERS). ANAL LETT 2021. [DOI: 10.1080/00032719.2021.1948049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Yujie He
- College of Chemistry and Chemical Engineering, Central South University, Changsha, China
| | - Ming Wen
- College of Chemistry and Chemical Engineering, Central South University, Changsha, China
| | - Xiao Zhou
- Chinese Academy of Cultural Heritage, Beijing, China
| | - Feng Gao
- Chinese Academy of Cultural Heritage, Beijing, China
| | - Hongmei Lu
- College of Chemistry and Chemical Engineering, Central South University, Changsha, China
| |
Collapse
|
9
|
Can HK, Sevim H, Şahin Ö, Gürpınar ÖA. Experimental routes of cytotoxicity studies of nanocomposites based on the organo-bentonite clay and anhydride containing co- and terpolymers. Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-021-03776-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
10
|
Khan AS, Muhammad S, Ambreen J, Farooq M, Ihsan J, Haleem A, Usman M, Siddiq M. Fabrication of Manganese Oxide-silica Based Functional Polymer Composite Membranes and Their Environmental Application. POLYM-PLAST TECH MAT 2021. [DOI: 10.1080/25740881.2021.1904985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Anwar Saeed Khan
- Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan
| | - Saz Muhammad
- Department of Chemistry, Govt. College University Faisalabad, Sub-campus Layyah, Layyah, Pakistan
| | - Jaweria Ambreen
- Department of Chemistry, COMSATS University Islamabad, Islamabad, Pakistan
| | - Muhammad Farooq
- Department of Chemistry, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan
| | - Junaid Ihsan
- Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan
| | - Abdul Haleem
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, China
| | - Muhammad Usman
- Department of Chemistry, Govt. College University Faisalabad, Layyah, Pakistan
| | - Muhammad Siddiq
- Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan
| |
Collapse
|
11
|
Thakkar SV, Malfatti L. Silica-graphene porous nanocomposites for environmental remediation: A critical review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 278:111519. [PMID: 33113395 DOI: 10.1016/j.jenvman.2020.111519] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 09/24/2020] [Accepted: 10/13/2020] [Indexed: 06/11/2023]
Abstract
With the increase of industrialization, there is an urgent need for developing technologies to detect and remove toxic pollutants from water bodies. The pollutants are often released to the environment due to the consumption of raw materials that are necessary for the production of technological goods (such as chemical and pharmaceutical compounds, metals, and alloys or foods). Amongst all the remediation techniques, adsorption is considered as one of the preferred techniques, due to its fast and efficient removal of contaminants. Novel materials, which are engineered for selective and responsive water remediation, have also recently revealed a strong potential in the detection of pollutants. Here, current trends of silica-graphene (SG) porous composites for the removal of oils, organic solvents, heavy metals, and dyes are reviewed in detail. Insights on the modifications of composites to enhance their sorption performance have been highlighted. In addition, the detection of pollutants using porous SG nanocomposites is also critically reviewed. Overall, SG composites reveal a strong potential as nanostructure materials with improved efficiency for environmental-based applications.
Collapse
Affiliation(s)
- Swapneel Vijay Thakkar
- Department of Chemistry and Pharmacy, University of Sassari, Via Vienna 2, 07100 Sassari, Italy.
| | - Luca Malfatti
- Department of Chemistry and Pharmacy, University of Sassari, Via Vienna 2, 07100 Sassari, Italy.
| |
Collapse
|
12
|
Effect of the active phase-support interaction on the electronic, thermal and catalytic properties of [H–Pyr]+[HSO4]−/support (support = rice husk ash; corundum). J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113725] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
13
|
Innocenzi P, Malfatti L. Mesoporous materials as platforms for surface-enhanced Raman scattering. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.02.031] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
14
|
Ryplida B, Lee G, In I, Park SY. Zwitterionic carbon dot-encapsulating pH-responsive mesoporous silica nanoparticles for NIR light-triggered photothermal therapy through pH-controllable release. Biomater Sci 2019; 7:2600-2610. [DOI: 10.1039/c9bm00160c] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Here, we designed a pH-responsive Indocyanine Green (ICG)-loaded zwitterionic fluorescent carbon dot (CD)-encapsulating mesoporous silica nanoparticle (MSN) for pH-tunable image-guided photothermal therapy.
Collapse
Affiliation(s)
- Benny Ryplida
- Department of IT Convergence
- Korea National University of Transportation
- Chungju 380-702
- Republic of Korea
| | - Gibaek Lee
- Department of Chemical and Biological Engineering
- Korea National University of Transportation
- Chungju 380-702
- Republic of Korea
| | - Insik In
- Department of IT Convergence
- Korea National University of Transportation
- Chungju 380-702
- Republic of Korea
- Department of Polymer Science and Engineering
| | - Sung Young Park
- Department of IT Convergence
- Korea National University of Transportation
- Chungju 380-702
- Republic of Korea
- Department of Chemical and Biological Engineering
| |
Collapse
|
15
|
Feng E, Zheng T, He X, Chen J, Tian Y. A novel ternary heterostructure with dramatic SERS activity for evaluation of PD-L1 expression at the single-cell level. SCIENCE ADVANCES 2018; 4:eaau3494. [PMID: 30406203 PMCID: PMC6214639 DOI: 10.1126/sciadv.aau3494] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 10/02/2018] [Indexed: 05/03/2023]
Abstract
Surface-enhanced Raman scattering (SERS) probes based on a charge transfer (CT) process with high stability and reproducibility are powerful tools under open-air conditions. However, the key problem ahead of practical usage of CT-based SERS technology is how to effectively improve sensitivity. Here, a novel ternary heterostructure SERS substrate, Fe3O4@GO@TiO2, with a significant enhancement factor of 8.08 × 106 was first synthesized. We found the remarkable enhanced effect of SERS signal to be attributed to the resonance effect of CuPc, CT between GO and TiO2, and enrichment from a porous TiO2 shell. In addition, we developed a robust SERS probe with good recyclability under visible light illumination on Fe3O4@GO@TiO2 nanocomposites toward ultrasensitive detection of cancer cells down to three cells. We have now successfully applied this probe for in situ quantification and imaging of programmed cell death receptor ligand 1 (PD-L1) on triple-negative breast cancer cell surface at the single-cell level and for monitoring the expression variation of PD-L1 during drug treatment.
Collapse
Affiliation(s)
- Enduo Feng
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, Shanghai 200241, P. R. China
| | - Tingting Zheng
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, Shanghai 200241, P. R. China
- Corresponding author. (T.Z.); (Y.T.)
| | - Xiaoxiao He
- State Key Laboratory of Precision Spectroscopy, East China Normal University, North Zhongshan Road 3663, Shanghai 200062, P. R. China
| | - Jinquan Chen
- State Key Laboratory of Precision Spectroscopy, East China Normal University, North Zhongshan Road 3663, Shanghai 200062, P. R. China
| | - Yang Tian
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, Shanghai 200241, P. R. China
- Corresponding author. (T.Z.); (Y.T.)
| |
Collapse
|
16
|
Jiang Y, Carboni D, Malfatti L, Innocenzi P. Graphene Oxide-Silver Nanoparticles in Molecularly-Imprinted Hybrid Films Enabling SERS Selective Sensing. MATERIALS 2018; 11:ma11091674. [PMID: 30201868 PMCID: PMC6163847 DOI: 10.3390/ma11091674] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 08/23/2018] [Accepted: 09/03/2018] [Indexed: 11/16/2022]
Abstract
A highly sensitive and selective Raman sensor has been developed by combining molecularly imprinted cavities, silver nanoparticles, and graphene oxide into a hybrid organic-inorganic film. The molecular imprinted nanocomposite material is an advanced platform that exhibits Graphene-mediated Surface-Enhanced Raman Scattering. The sensing layers have been prepared via sol-gel process and imprinted with rhodamine 6G to obtain selective dye recognition. Graphene oxide sheets decorated with silver nanoparticles have been incorporated into the matrix to enhance the Raman scattering signal. The template molecule can be easily removed from the films by ultrasonication in ethanol. A 712-fold Raman enhancement has been observed, which corresponds to a 2.15 × 1013 count·μmol−1 signal enhancement per molecular cavity. Besides Raman enhancement, the sensing platform has shown an excellent selectivity toward the test molecule with respect to similar dyes. In addition, the material can be reused at least 10 times without any loss of performance.
Collapse
Affiliation(s)
- Yu Jiang
- Laboratorio di Scienza dei Materiali e Nanotecnologie (LMNT), Dipartimento di Chimica e Farmacia, Università di Sassari, CR-INSTM, Via Vienna 2, 07041 Sassari, Italy.
| | - Davide Carboni
- Laboratorio di Scienza dei Materiali e Nanotecnologie (LMNT), Dipartimento di Chimica e Farmacia, Università di Sassari, CR-INSTM, Via Vienna 2, 07041 Sassari, Italy.
| | - Luca Malfatti
- Laboratorio di Scienza dei Materiali e Nanotecnologie (LMNT), Dipartimento di Chimica e Farmacia, Università di Sassari, CR-INSTM, Via Vienna 2, 07041 Sassari, Italy.
| | - Plinio Innocenzi
- Laboratorio di Scienza dei Materiali e Nanotecnologie (LMNT), Dipartimento di Chimica e Farmacia, Università di Sassari, CR-INSTM, Via Vienna 2, 07041 Sassari, Italy.
| |
Collapse
|
17
|
Bokobza L. Spectroscopic Techniques for the Characterization of Polymer Nanocomposites: A Review. Polymers (Basel) 2017; 10:polym10010007. [PMID: 30966046 PMCID: PMC6415100 DOI: 10.3390/polym10010007] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2017] [Revised: 12/18/2017] [Accepted: 12/19/2017] [Indexed: 11/21/2022] Open
Abstract
Due to the growing interest in nanocomposites, a molecular characterization of these materials is essential for the understanding of their properties and for the development of new materials. Spectroscopic techniques that bring information at a molecular level are unavoidable when characterizing polymers, fillers and composites. Selected examples of the application of fluorescence, solid-state nuclear magnetic resonance (NMR), infrared and Raman spectroscopies, illustrate the potential of these techniques for the analysis of the filler surface, the evaluation of the state of filler dispersion in the host matrix, the extent of interaction between the polymer and the filler particles or the dynamics of polymer chains at the polymer–filler interface.
Collapse
|
18
|
Zheng T, Feng E, Wang Z, Gong X, Tian Y. Mechanism of Surface-Enhanced Raman Scattering Based on 3D Graphene-TiO 2 Nanocomposites and Application to Real-Time Monitoring of Telomerase Activity in Differentiation of Stem Cells. ACS APPLIED MATERIALS & INTERFACES 2017; 9:36596-36605. [PMID: 28980796 DOI: 10.1021/acsami.7b11028] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
With a burst development of new nanomaterials for plasmon-free surface-enhanced Raman scattering (SERS), the understanding of chemical mechanism (CM) and further applications have become more and more attractive. Herein, a novel SERS platform was specially designed through electrochemical deposition of graphene onto TiO2 nanoarrays (EG-TiO2). The developed EG-TiO2 nanocomposite SERS platform possessed remarkable Raman activity using copper phthalocyanine (CuPc) as a probe molecule. X-ray photoelectron spectroscopy measurement revealed that the chemical bond Ti-O-C was formed at the interface between graphene and TiO2 in EG-TiO2 nanocomposites. Both experimental and theoretical results demonstrated that the obvious Raman enhancement was attributed to TiO2-induced Fermi level shift of graphene, resulting in effective charge transfer between EG-TiO2 nanocomposites and molecules. Taking advantage of a marked Raman response of the CuPc molecule on the EG-TiO2 nanocomposite surface as well as specific recognition of CuPc toward multiple telomeric G-quadruplex, EG-TiO2 nanocomposites were tactfully employed as the SERS substrate for selective and ultrasensitive determination of telomerase activity, with a low detection limit down to 2.07 × 10-16 IU. Interestingly, the self-cleaning characteristic of EG-TiO2 nanocomposites under visible light irradiation successfully provided a recycling ability for this plasmon-free EG-TiO2 substrate. The present SERS biosensor with high analytical performance, such as high selectivity and sensitivity, has been further explored to determine telomerase activity in stem cells as well as to count the cell numbers. More importantly, using this useful tool, it was discovered that telomerase activity plays an important role in the proliferation and differentiation from human mesenchymal stem cells to neural stem cells. This work has not only established an approach for gaining fundamental insights into the chemical mechanism (CM) of Raman enhancement but also has opened a new way in the investigation of long-term dynamics of stem cell differentiation and clinical drug screening.
Collapse
Affiliation(s)
- Tingting Zheng
- Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University , Dongchuan Road 500, Shanghai 200241, China
| | - Enduo Feng
- Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University , Dongchuan Road 500, Shanghai 200241, China
| | - Zhiqiang Wang
- Key Laboratory for Advanced Materials, Centre or computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, China
| | - Xueqing Gong
- Key Laboratory for Advanced Materials, Centre or computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, China
| | - Yang Tian
- Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University , Dongchuan Road 500, Shanghai 200241, China
| |
Collapse
|
19
|
Carboni D, Jiang Y, Faustini M, Malfatti L, Innocenzi P. Improving the Selective Efficiency of Graphene-Mediated Enhanced Raman Scattering through Molecular Imprinting. ACS APPLIED MATERIALS & INTERFACES 2016; 8:34098-34107. [PMID: 27960379 DOI: 10.1021/acsami.6b11090] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Enhancement of Raman scattering signal through graphene is an important property that could be exploited for producing innovative sensing devices with advanced properties. Because the enhancement of Raman scattering is due to only a chemical mechanism, the amplification of the signal is lower than that one produced by excitation of localized surface plasmons. The combination of a highly selective technique, which is molecular imprinting, with graphene-mediated enhanced Raman scattering, represents a new synergistic approach that we have developed in the present work. The careful material design has allowed obtaining a porous composite embedding exfoliated graphene and molecular cavities specifically designed for recognizing Rhodamine 6G. The molecularly imprinted porous samples have shown a signal enhancement that increases as a function of the number of molecular cavities, which are also accountable for the molecular recognition properties. Environmental ellipsometric porosimetry has shown no substantial difference between molecularly imprinted and not-imprinted films confirming that the signal enhancement of the imprinted samples is due to the molecular cavities. Interestingly, the most efficient sample has shown a Raman enhancement per cavity that exceeds the value of 1 × 1012 and a remarkable molecular selectivity allowing for a Rhodamine 6G signal amplification 4.5 higher than structural analogues such as Rhodamine B and methylene blue. The robust and flexible matrix ensures a good recyclability of the samples without lack of linear response. These results prove the great potential of molecular imprinting as a general strategy to provide selectivity to GERS-active substrates for a new generation of sensing devices.
Collapse
Affiliation(s)
- Davide Carboni
- Laboratorio di Scienza dei Materiali e Nanotecnologie, Dipartimento di Architettura, Design e Urbanistica (DADU), Università di Sassari, CR-INSTM , Palazzo Pou Salit, Piazza Duomo 6, 07041 Alghero (Sassari), Italy
| | - Yu Jiang
- Laboratorio di Scienza dei Materiali e Nanotecnologie, Dipartimento di Architettura, Design e Urbanistica (DADU), Università di Sassari, CR-INSTM , Palazzo Pou Salit, Piazza Duomo 6, 07041 Alghero (Sassari), Italy
| | - Marco Faustini
- Laboratoire de Chimie de la Matière Condensée de Paris, UMR 7574, C ollège de France, CNRS, UPMC Univ. Paris 06, Sorbonne Universités , F-75005 Paris, France
| | - Luca Malfatti
- Laboratorio di Scienza dei Materiali e Nanotecnologie, Dipartimento di Architettura, Design e Urbanistica (DADU), Università di Sassari, CR-INSTM , Palazzo Pou Salit, Piazza Duomo 6, 07041 Alghero (Sassari), Italy
| | - Plinio Innocenzi
- Laboratorio di Scienza dei Materiali e Nanotecnologie, Dipartimento di Architettura, Design e Urbanistica (DADU), Università di Sassari, CR-INSTM , Palazzo Pou Salit, Piazza Duomo 6, 07041 Alghero (Sassari), Italy
| |
Collapse
|
20
|
Loche D, Malfatti L, Carboni D, Alzari V, Mariani A, Casula MF. Incorporation of graphene into silica-based aerogels and application for water remediation. RSC Adv 2016. [DOI: 10.1039/c6ra09618b] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Graphene/silica nanocomposites in the form of highly porous aerogels are obtained for the first time by integrating a novel approach for the production of low defectivity graphene with a two-step route for the synthesis of a silica-based monolith.
Collapse
Affiliation(s)
- D. Loche
- Department of Chemical and Geological Sciences
- University of Cagliari
- Monserrato
- Italy
| | - L. Malfatti
- Materials Science and Nanotechnology Laboratory
- CR-INSTM
- University of Sassari
- Alghero
- Italy
| | - D. Carboni
- Materials Science and Nanotechnology Laboratory
- CR-INSTM
- University of Sassari
- Alghero
- Italy
| | - V. Alzari
- Department of Chemistry and Pharmacy
- University of Sassari
- Sassari
- Italy
| | - A. Mariani
- Department of Chemistry and Pharmacy
- University of Sassari
- Sassari
- Italy
| | - M. F. Casula
- Department of Chemical and Geological Sciences
- University of Cagliari
- Monserrato
- Italy
| |
Collapse
|
21
|
Innocenzi P, Malfatti L, Carboni D. Graphene and carbon nanodots in mesoporous materials: an interactive platform for functional applications. NANOSCALE 2015; 7:12759-72. [PMID: 26177068 DOI: 10.1039/c5nr03773e] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The present review is focused on a specific class of nanocomposites obtained through integration of graphene or carbon-based nanomaterials (such as carbon nanodots) with mesoporous inorganic or hybrid materials, obtained via template assisted self-assembly. The task of integrating graphene and carbon nanodots with a self-assembly process is still very challenging and this review shows some of the solutions which have been envisaged so far. These nanocomposite materials are an ideal interactive platform for developing innovative functional applications; they have a high capability of undergoing integration into advanced devices, which well exploits the advantage of tuning the wide properties and flexibility of the soft-chemistry route. A wide range of applications have been developed so far which span from sensing to electronics up to optics and biomedicine. Even though a large number of proof-of-concepts have been reported to date, an even greater expansion of applications in the field is expected to happen in the near future.
Collapse
Affiliation(s)
- Plinio Innocenzi
- Laboratorio di Scienza dei Materiali e Nanotecnologie, CR-INSTM, DADU, Università di Sassari, Palazzo Pou Salid, Piazza Duomo 6, 07041 Alghero (SS), Italy.
| | | | | |
Collapse
|
22
|
Kao KC, Lin CH, Chen TY, Liu YH, Mou CY. A general method for growing large area mesoporous silica thin films on flat substrates with perpendicular nanochannels. J Am Chem Soc 2015; 137:3779-82. [PMID: 25756760 DOI: 10.1021/jacs.5b01180] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Here we introduce a new synthetic approach to grow mesoporous silica thin films with vertical mesochannels on centimeter-sized substrates via an oil-induced co-assembly process. Adding an oil, i.e., decane, into a CTAB-EtOH-TEOS ammonia solution leads to thin-film formation of mesoporous silica of controlled thickness between 20 and 100 nm with vertical mesochannels on various surfaces. The vertical mesoporous channels were evidenced by grazing incidence small-angle X-ray scattering (GISAXS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) characterizations. Decane played two roles: (a) as a pore expansion agent (up to 5.7 ± 0.5 nm) and (b) inducing vertically oriented hexagonal mesophases of micelle-silica composite. The production of periodic and vertical nanochannels is very robust, over many different substrate surfaces (from silicon to polystyrene), various silica precursors (TEOS, fumed silica, or zeolite seed), and many oils (decane, petroleum ether, or ethyl acetate). This wide robustness in the formation of vertical nanophases is attributed to a unique mechanism of confined synthesis of surfactant-silicate between two identical thin layers of oils on a substrate.
Collapse
Affiliation(s)
- Kun-Che Kao
- †Department of Chemistry and Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan
| | - Cheng-Han Lin
- †Department of Chemistry and Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan
| | - Tzu-Ying Chen
- †Department of Chemistry and Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan
| | - Yi-Hsin Liu
- ∥Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan
| | - Chung-Yuan Mou
- †Department of Chemistry and Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan
| |
Collapse
|