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Akbari Beni F, Izadpanah Ostad M, Niknam Shahrak M, Ayati A. Unveiling the remarkable simultaneous adsorption-photocatalytic potential of Ag nanoparticles-anchored phosphotungestic acid loaded ZIF-8 for Congo red removal. ENVIRONMENTAL RESEARCH 2024; 252:119049. [PMID: 38704003 DOI: 10.1016/j.envres.2024.119049] [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: 03/12/2024] [Revised: 04/25/2024] [Accepted: 04/28/2024] [Indexed: 05/06/2024]
Abstract
This research paper presents a direct approach to synthesize AgNPs deposited on polyoxometalate/ZIF-8 on-site (referred to as AgNPS@PW@ZIF-8) to develop a highly efficient photocatalyst in the water treatment. Phosphotungestic acid (PW) serves a multi-purpose in this context: it acts as a bridge layer between AgNPs and Zeolitic Imidazolate Framework-8 (ZIF-8), a local reducing agent, and a catalyst for electron transfer during the photocatalysis process. A comprehensive characterization of the resulting nanostructure was performed utilizing an array of techniques, such as XRD, FTIR, EDX, TEM, BET, Raman, and TGA. The nanostructure that was created exhibited effective removal of Congo red at different pH levels via a combination of simultaneous adsorption and photocatalysis. After 60 min at pH 7, the dye molecules were completely eliminated in the presence of 0.5 g/L AgNPS@PW@ZIF-8 at room temperature. The charge transfer can be facilitated by the PW bridge layer connecting AgNPs and ZIF-8, owing to the photoactive characteristics and strong electron transfer capabilities of PW molecules. Strong electron transferability of PW between Ag nanoparticles and ZIF-8 facilitates charge transfer and significantly improves the photocatalytic performance of ZIF-8. Moreover, the nanostructure demonstrated great structural stability and recyclability, sustaining a high efficiency of removal throughout five consecutive cycles through the implementation of a simple procedure. Widespread applications of the developed nanostructure in aquatic environments for adsorption and photocatalytic reactions are possible.
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Affiliation(s)
- Faeze Akbari Beni
- Department of Chemical Engineering, Faculty of Advanced Technologies, Quchan University of Technology, Quchan, P.O. Box 84686-94717, Iran
| | - Mohammad Izadpanah Ostad
- Department of Chemical Engineering, Faculty of Advanced Technologies, Quchan University of Technology, Quchan, P.O. Box 84686-94717, Iran
| | - Mahdi Niknam Shahrak
- Department of Chemical Engineering, Faculty of Advanced Technologies, Quchan University of Technology, Quchan, P.O. Box 84686-94717, Iran.
| | - Ali Ayati
- Department of Chemical Engineering, Faculty of Advanced Technologies, Quchan University of Technology, Quchan, P.O. Box 84686-94717, Iran; EnergyLab, ITMO University, Lomonosova Street 9, Saint Petersburg, 191002, Russian Federation.
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2
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Golubewa L, Timoshchenko I, Kulahava T. Specificity of carbon nanotube accumulation and distribution in cancer cells revealed by K-means clustering and principal component analysis of Raman spectra. Analyst 2024; 149:2680-2696. [PMID: 38497436 DOI: 10.1039/d3an02078a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
Single-walled carbon nanotubes (SWCNTs) show great potential for their application as cancer therapeutic nanodrugs, but the efficiency and mechanism of their accumulation in the cell, the modulation of cell activity, and the strong dependence of the results on the type of capping molecule still hinder the transfer of SWCNTs to the clinic. In the present study, we determined the mechanism and sequence of accumulation, distribution and type discrimination of SWCNTs in glioma cells by applying K-means clustering and principal component analysis (PCA) of Raman spectra of cells exposed to SWCNTs capped with either DNA or oligonucleotides (ON). Based on the specific biochemical information uncovered by PCA and further applied to K-means, we show that the accumulation of SWCNT-DNA occurs in two phases. The first phase involves the transport of SWCNT-DNA through vesicles and its redistribution in the cytoplasm, which is reflected in two SWCNT-related clusters. The second phase begins after 18 hours of interaction between cells and SWCNT-DNA. PCA shows the appearance of two SWCNT-associated PC loadings, reflected by the addition of a new cluster of SWCNTs with a narrowed and shifted G-peak in the spectra. It is caused by the loss of DNA capping and clumping of SWCNTs and triggered by the acidic conditions in autolysosomes resulting from the fusion of transport vesicles with lysosomes. SWCNTs penetrate all cellular compartments after 42-66 hours and lead to cell death. The clumped SWCNTs are released to the outside. In contrast, SWCNT-ON is hardly accumulated in glioma cells and after 72 hours of exposure to SWCNT-ON, the accumulation of SWCNTs corresponds to the first stage without reaching the second. PCA made it possible to separate the characteristics of cellular components against the high-intensity Raman signal from nanotubes and, thus, to propose the mechanism of accumulation and metabolism of nanomaterials in living cells without the use of additional research approaches. Our results elucidate the time dependence of the accumulation of SWCNTs on the capping molecule. We expect that our results can make an important contribution to the use of these nanomaterials in the clinic.
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Affiliation(s)
- Lena Golubewa
- Department of Molecular Compounds Physics, State Research Institute Centre for Physical Sciences and Technology, Saulėtekio av. 3, Vilnius, 10257, Lithuania.
| | - Igor Timoshchenko
- Department of Computer Modelling, Physics Faculty, Belarusian State University, Nezavisimosti av. 4, Minsk, 220030, Belarus
- Laboratory of Nanoelectromagnetics, Institute for Nuclear Problems of Belarusian State University, Bobruiskaya str. 11, Minsk, 220006, Belarus
| | - Tatsiana Kulahava
- Laboratory of Nanoelectromagnetics, Institute for Nuclear Problems of Belarusian State University, Bobruiskaya str. 11, Minsk, 220006, Belarus
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3
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Zhao Y, Kumar A, Yang Y. Unveiling practical considerations for reliable and standardized SERS measurements: lessons from a comprehensive review of oblique angle deposition-fabricated silver nanorod array substrates. Chem Soc Rev 2024; 53:1004-1057. [PMID: 38116610 DOI: 10.1039/d3cs00540b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
Recently, there has been an exponential growth in the number of publications focusing on surface-enhanced Raman scattering (SERS), primarily driven by advancements in nanotechnology and the increasing demand for chemical and biological detection. While many of these publications have focused on the development of new substrates and detection-based applications, there is a noticeable lack of attention given to various practical issues related to SERS measurements and detection. This review aims to fill this gap by utilizing silver nanorod (AgNR) SERS substrates fabricated through the oblique angle deposition method as an illustrative example. The review highlights and addresses a range of practical issues associated with SERS measurements and detection. These include the optimization of SERS substrates in terms of morphology and structural design, considerations for measurement configurations such as polarization and the incident angle of the excitation laser, and exploration of enhancement mechanisms encompassing both intrinsic properties induced by the structure and materials, as well as extrinsic factors arising from wetting/dewetting phenomena and analyte size. The manufacturing and storage aspects of SERS substrates, including scalable fabrication techniques, contamination control, cleaning procedures, and appropriate storage methods, are also discussed. Furthermore, the review delves into device design considerations, such as well arrays, flow cells, and fiber probes, and explores various sample preparation methods such as drop-cast and immersion. Measurement issues, including the effect of excitation laser wavelength and power, as well as the influence of buffer, are thoroughly examined. Additionally, the review discusses spectral analysis techniques, encompassing baseline removal, chemometric analysis, and machine learning approaches. The wide range of AgNR-based applications of SERS, across various fields, is also explored. Throughout the comprehensive review, key lessons learned from collective findings are outlined and analyzed, particularly in the context of detailed SERS measurements and standardization. The review also provides insights into future challenges and perspectives in the field of SERS. It is our hope that this comprehensive review will serve as a valuable reference for researchers seeking to embark on in-depth studies and applications involving their own SERS substrates.
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Affiliation(s)
- Yiping Zhao
- Department of Physics and Astronomy, The University of Georgia, Athens, GA 30602, USA.
| | - Amit Kumar
- Department of Physics and Astronomy, The University of Georgia, Athens, GA 30602, USA.
| | - Yanjun Yang
- School of Electrical and Computer Engineering, College of Engineering, The University of Georgia, Athens, GA 30602, USA.
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4
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Cuvillier L, Passaretti A, Guilminot E, Joseph E. Agar and Chitosan Hydrogels' Design for Metal-Uptaking Treatments. Gels 2024; 10:55. [PMID: 38247779 PMCID: PMC10815442 DOI: 10.3390/gels10010055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 12/16/2023] [Accepted: 12/20/2023] [Indexed: 01/23/2024] Open
Abstract
In the field of cultural heritage, the use of natural gels is rising for the application of active agents. Here, two natural polymers are assessed: agar, a pioneer hydrogel for conservation treatments, and chitosan, a rather novel and metal-binding gel. For chitosan, a state-of-the-art based formulation (CS-ItA-LCys) is evaluated as it was reported for silver-complexing properties. It is evaluated whether these polymers can withstand the addition of the chelating compound deferoxamine, which is a bacterial siderophore. This allows for the obtainment of completely bio-sourced gel systems. A Fourier-transformed (FT) infrared spectroscopy characterization is performed, completed with rheological measurements and Cryo-Scanning Electron Microscopy (cryo-SEM) to investigate the physico-chemical properties of the gels, as well as their interaction with deferoxamine. Both polymers are also tested for their inherent complexing ability on silver ions using FT-Raman spectroscopy. A multi-analytical comparison shows different microstructures, in particular, the presence of a thick membrane for chitosan and different mechanical behaviors, with agar being more brittle. Neither hydrogel seems affected by the addition of deferoxamine; this is shown by similar rheological behavior and molecular structures in the presence or absence of the chelator. The intrinsic abilities of the chitosan formulation to make silver complex are demonstrated with the observation of two peaks characteristic of Ag-S and Ag-O bonds. Agar and chitosan are both proven to be reliable gels to act as carriers for bio-based active agents. This paper confirms the potential asset of the chitosan formulation CS-ItA-LCys as a promising gel for the complexation of soluble silver.
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Affiliation(s)
- Luana Cuvillier
- Laboratory of Technologies for Heritage Materials, University of Neuchâtel, Bellevaux 51, 2000 Neuchâtel, Switzerland; (L.C.); (A.P.)
- Haute Ecole Arc Conservation Restauration, University of Applied Sciences and Arts Western Switzerland HES-SO, Espace de l’Europe 11, 2000 Neuchâtel, Switzerland
| | - Arianna Passaretti
- Laboratory of Technologies for Heritage Materials, University of Neuchâtel, Bellevaux 51, 2000 Neuchâtel, Switzerland; (L.C.); (A.P.)
- Haute Ecole Arc Conservation Restauration, University of Applied Sciences and Arts Western Switzerland HES-SO, Espace de l’Europe 11, 2000 Neuchâtel, Switzerland
| | - Elodie Guilminot
- Arc’Antique Conservation and Research Laboratory, 26 Rue de la Haute Forêt, 44300 Nantes, France;
| | - Edith Joseph
- Haute Ecole Arc Conservation Restauration, University of Applied Sciences and Arts Western Switzerland HES-SO, Espace de l’Europe 11, 2000 Neuchâtel, Switzerland
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5
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Fu CP, Li KJ, He JY, Yu WH, Zhou CH. Controlled fabrication of Ag@clay nanomaterials for ultrasensitive and rapid surface-enhanced Raman spectroscopic detection. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:1001-1015. [PMID: 36541705 DOI: 10.1039/d2ay01262f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The nanostructure of Ag nanoparticles (NPs) plays a critical role in their surface-enhanced Raman scattering (SERS) activity. Despite many efforts to tune the nanostructure of Ag NPs, it remains a great challenge as Ag NPs tend to agglomerate and their nanostructure is difficult to control. Herein, newly-discovered clay-surfactant-Ag+ materials and interfacial processes were developed and used to prepare uniform spherical Ag@synthetic hectorite (Ag@Hct) nanomaterials for ultrasensitive SERS assay. Sodium dodecyl sulfate (SDS), an anionic surfactant, acted as a bridge to conjugate the positively charged edge of Hct NPs and Ag+via electrostatic interaction to form the bridging nanostructure of Hct-SDS-Ag+, which promoted the uniform dispersion of Hct NPs. Following this, Ag+ was reduced to Ag0 by the reductant, and Ag0 grew on the surface of disc-like Hct NPs to form spherical Ag@Hct nanomaterials with an average particle size of ∼24 nm. The prepared Ag@Hct nanomaterials showed an ultrasensitive SERS response to methylene blue (MB) with a detection limit of 10-12 M. The detection limit of MB in sewage was 10-11 M. The prepared Ag@Hct nanomaterials also exhibited great SERS enhancement for malachite green and crystal violet. This work provides a novel and simple approach to prepare Ag@Hct nanomaterials with uniform spheres and adjustable particle size, allowing more sensitive and reproducible detection of MB.
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Affiliation(s)
- Chao Peng Fu
- Research Group for Advanced Materials & Sustainable Catalysis (AMSC), State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032, China.
| | - Ke Jin Li
- Research Group for Advanced Materials & Sustainable Catalysis (AMSC), State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032, China.
| | - Jia Yong He
- Research Group for Advanced Materials & Sustainable Catalysis (AMSC), State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032, China.
| | - Wei Hua Yu
- Zhijiang College, Zhejiang University of Technology, Shaoxing, 312030, China
| | - Chun Hui Zhou
- Research Group for Advanced Materials & Sustainable Catalysis (AMSC), State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032, China.
- Qing Yang Institute for Industrial Minerals, Youhua, Qingyang, Chizhou, 242804, China
- Engineering Research Center of Non-metallic Minerals of Zhejiang Province, Zhejiang Institute of Geology and Mineral Resources, Hangzhou, 310007, China
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6
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Parida A, Alagarasan D, Ganesan R, Bisoyi S, Naik R. Influence of time dependent laser-irradiation for tuning the linear-nonlinear optical response of quaternary Ag 10In 15S 15Se 60 films for optoelectronic applications. RSC Adv 2023; 13:4236-4248. [PMID: 36744282 PMCID: PMC9890660 DOI: 10.1039/d2ra07981j] [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: 12/14/2022] [Accepted: 01/25/2023] [Indexed: 02/05/2023] Open
Abstract
The impact of laser irradiation on thin films results in multiple beneficial modifications of their structural, morphological, nonlinear-linear properties for optoelectronics applications. This work deals with the thermally evaporated Ag10In15S15Se60 films and post-laser irradiation to study the variations in structural and optical properties. The current investigation was carried out for different laser irradiation time durations such as 0, 10, 20, 30, and 60 minutes by 532 nm laser (2.34 eV). According to the X-ray diffraction analysis, all thin films have polycrystalline character. The change in the surface morphology after being exposed to the laser has been checked by FESEM, whereas the presence of constitutional elements has been verified by the EDX study. The related changes with laser irradiation in the optical properties, including both linear and nonlinear, were studied using UV-Vis spectroscopy data. The irradiation caused an enhancement in the transmission, and the absorption edge moved towards a lower wavelength, increasing the bandgap energy from 1.71 eV to 1.88 eV. The refractive index reduced as a result of the film's altered structure. The behaviour of the refractive index satisfies Moss's rule (E g n 4 = const). The nonlinear refractive index, first-order and 3rd order nonlinear susceptibility, is found to be decreased with laser irradiation. The dielectric parameters are also observed to be decreased with irradiation. Considering all the alterations in its properties caused by irradiation, the Ag10In15S15Se60 sample could be a favourable material for various photonic devices.
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Affiliation(s)
- Abinash Parida
- Department of Engineering and Materials Physics, ICT-IOC Bhubaneswar 751013 India
| | - D Alagarasan
- Department of Physics, Indian Institute of Science Bengaluru 560012 India
- Department of Physics, NITTE Meenakshi Institute of Technology Yelahanka Bengaluru 560064 India
| | - R Ganesan
- Department of Physics, Indian Institute of Science Bengaluru 560012 India
| | - Sagar Bisoyi
- Department of Physics, School of Applied Science, KIIT Deemed to be University Bhubaneswar 751024 India
| | - R Naik
- Department of Engineering and Materials Physics, ICT-IOC Bhubaneswar 751013 India
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7
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Mohandoss S, Palanisamy S, You S, Shim JJ, Lee YR. Rapid detection of silver ions based on luminescent carbon nanodots for multicolor patterning, smartphone sensors, and bioimaging applications. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:5719-5726. [PMID: 34812808 DOI: 10.1039/d1ay01746b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Photoluminescent nitrogen and sulfur co-doped carbon nanodots (N,S-CNDs) were prepared via single-step hydrothermal carbonization using 2,4-diaminobenzenesulfonic acid (2,4-DABSA) as the sole precursor. The synthesized N,S-CNDs are easily dispersed in aqueous solution and have an average particle size of 5.0 ± 0.2 nm, showing a high quantum yield of 23.1% with excellent stability. The surface states of the N,S-CNDs were confirmed by Fourier-transform infrared spectroscopy, powder X-ray diffractometry, Raman spectroscopy, and X-ray photoelectron spectroscopy techniques. These N,S-CNDs were applied for the rapid visual sensing detection of Ag+ ions, which can be identified by their photoluminescent color change under ultraviolet (UV) light illumination at 365 nm within 5 s. Furthermore, a linear correlation coefficient between P0/P and Ag+ ions was observed in the linear range of 0-1.2 μM with a detection limit of 7.88 nM. The proposed method was successfully used for the sensitive detection of Ag+ ions in real samples with satisfactory recoveries and relative standard deviation. The photoluminescence properties of N,S-CND and N,S-CNDs/Ag+ aqueous solutions were demonstrated by their invisible inks that can only be seen when irradiated with UV light. The RGB values of N,S-CND and N,S-CNDs/Ag+ aqueous solutions were measured using a color selector smartphone application. In addition, N,S-CND and N,S-CNDs/Ag+ aqueous solutions were further used for the multicolor imaging of HCT-116 cancer cells due to the low toxicity of N,S-CNDs.
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Affiliation(s)
- Sonaimuthu Mohandoss
- School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk-do 38541, Republic of Korea.
| | - Subramanian Palanisamy
- Department of Marine Food Science and Technology, Gangneung-Wonju National University, 120 Gangneungdaehangno, Gangneung, Gangwon 25457, Republic of Korea
| | - SangGuan You
- Department of Marine Food Science and Technology, Gangneung-Wonju National University, 120 Gangneungdaehangno, Gangneung, Gangwon 25457, Republic of Korea
| | - Jae-Jin Shim
- School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk-do 38541, Republic of Korea.
| | - Yong Rok Lee
- School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk-do 38541, Republic of Korea.
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8
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Xie Y. Enhancement effect of silver nanoparticles decorated titania nanotube array acting as active SERS substrate. INORG NANO-MET CHEM 2021. [DOI: 10.1080/24701556.2021.1984533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Yibing Xie
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, China
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9
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Montes-Duarte GG, Tostado-Blázquez G, Castro KLS, Araujo JR, Achete CA, Sánchez-Salas JL, Campos-Delgado J. Key parameters to enhance the antibacterial effect of graphene oxide in solution. RSC Adv 2021; 11:6509-6516. [PMID: 35423200 PMCID: PMC8694913 DOI: 10.1039/d0ra07945f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 01/14/2021] [Indexed: 11/21/2022] Open
Abstract
Graphene oxide (GO) has lately become an interesting biomaterial due to its stunning properties and versatility, its claimed antimicrobial activity holds promise for potential health applications. Nonetheless, multiple reports investigating GO antibacterial activity lack rigor and uniformity on several aspects which are crucial when evaluating this effect. In this work, we highlight and address these parameters: morphology of the materials, exposure time, exposure methodology and concentration. We investigate the effect of GO and GO-based metallic composites observing these parameters on two pathogenic bacteria. Our nanomaterials have been characterized by means of SEM, EDX, DLS, FTIR and Raman spectroscopies. Escherichia coli and Salmonella Typhimurium suspended in saline solutions (no growth medium) have been exposed to GO (lateral size = 100 nm), silver nanoparticles, ceria nanoparticles, GO/silver and GO/ceria aqueous solutions for 0, 5, 15, 30, 60 and 90 minutes, before plating. Our experiments indicate that no prior exposure of the materials to bacteria (0 min) results in poor inactivation rates independently of concentration, while increasing times of interaction enhance inactivation. Moreover, our experiments show concentration-dependent results showing higher activity for concentrations of 100 μg mL−1; and prove that 30 minutes of exposure are sufficient to deploy the antimicrobial effects of these materials. GO possesses the lowest inactivation rate, and the presence of silver and ceria nanoparticles in the GO surface boosts its antimicrobial effect. Thus, the enhancement of the antibacterial activity of graphene oxide relies on 30 minutes of interaction in water, concentration of 100 μg mL−1, and its decoration by silver/ceria nanoparticles. We investigate the effects of material morphology, exposure time, exposure methodology and concentration of graphene oxide (GO) and GO-based materials on two pathogenic bacteria.![]()
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Affiliation(s)
| | | | - K. L. S. Castro
- Instituto Nacional de Metrologia
- Qualidade e Tecnologia
- 25250-020 Duque de Caxias
- Brazil
| | - Joyce R. Araujo
- Instituto Nacional de Metrologia
- Qualidade e Tecnologia
- 25250-020 Duque de Caxias
- Brazil
| | - C. A. Achete
- Instituto Nacional de Metrologia
- Qualidade e Tecnologia
- 25250-020 Duque de Caxias
- Brazil
| | - José Luis Sánchez-Salas
- Universidad de las Américas Puebla
- Departamento de Ciencias Químico Biológicas
- San Andrés Cholula
- Mexico
| | - Jessica Campos-Delgado
- Universidad de las Américas Puebla
- Departamento de Ciencias Químico Biológicas
- San Andrés Cholula
- Mexico
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10
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Hao B, Wang K, Zhou Y, Sui C, Wang L, Bai R, Yang Z. Label-Free Detecting of the Compaction and Decompaction of ctDNA Molecules Induced by Surfactants with SERS Based on a nanoPAA-ZnCl 2-AuLs Solid Substrate. ACS OMEGA 2020; 5:1109-1119. [PMID: 31984267 PMCID: PMC6977030 DOI: 10.1021/acsomega.9b03294] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Accepted: 12/24/2019] [Indexed: 06/02/2023]
Abstract
DNA molecular compaction/decompaction is of great significance for the exploration of basic life processes, the research of biomedical and genetic engineering, and so forth. However, the detailed mechanism of DNA compaction/decompaction caused by surfactants remains an open and challenging problem that has not been fully solved so far. In this paper, a sort of novel solid substrate, nanoPAA-ZnCl2-AuLs, with good stability and high sensitivity, was prepared by a self-assembly method. Based on this substrate, the surface-enhanced Raman scattering (SERS) technology was employed to investigate characteristics of interactions between DNA molecules and surfactants at a single molecular level. SERS spectra of calf thymus DNA (ctDNA), cetyl trimethyl ammonium bromide (CTAB), and sodium dodecyl sulfate (SDS) with a concentration as low as 10-9 M, and SERS spectra of ctDNA-CTAB and ctDNA-CTAB-SDS composites were collected, respectively. The interactions between ctDNA and surfactants were analyzed by changes in SERS spectra, for example, disappearances and appearances of SERS bands and relative changes of peak intensity, in which CTAB resulted in the compaction of the DNA molecule while SDS induced the decompaction of the ctDNA-CTAB complex. Moreover, UV-visible spectrophotometry was employed to demonstrate the compaction/decompaction of ctDNA molecules caused by surfactants. The local binding modes of ctDNA molecules and surfactant molecules were expounded. This work will be helpful for understanding biological processes such as DNA compaction and recombination within nucleus or/and cells and for the development of gene therapy technologies.
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Affiliation(s)
- Bojuan Hao
- State
Key Laboratory of Cultivation Base for Photoelectric Technology and
Functional Materials, Laboratory of Optoelectronic Technology of Shaanxi
Province, National Center for International Research of Photoelectric
Technology & Nano-Functional Materials and Application, Institute
of Photonics and Photon-Technology, Northwest
University, Xi’an 710069, China
| | - Kaige Wang
- State
Key Laboratory of Cultivation Base for Photoelectric Technology and
Functional Materials, Laboratory of Optoelectronic Technology of Shaanxi
Province, National Center for International Research of Photoelectric
Technology & Nano-Functional Materials and Application, Institute
of Photonics and Photon-Technology, Northwest
University, Xi’an 710069, China
| | - Yukun Zhou
- State
Key Laboratory of Cultivation Base for Photoelectric Technology and
Functional Materials, Laboratory of Optoelectronic Technology of Shaanxi
Province, National Center for International Research of Photoelectric
Technology & Nano-Functional Materials and Application, Institute
of Photonics and Photon-Technology, Northwest
University, Xi’an 710069, China
| | - Chaofan Sui
- State
Key Laboratory of Cultivation Base for Photoelectric Technology and
Functional Materials, Laboratory of Optoelectronic Technology of Shaanxi
Province, National Center for International Research of Photoelectric
Technology & Nano-Functional Materials and Application, Institute
of Photonics and Photon-Technology, Northwest
University, Xi’an 710069, China
| | - Lei Wang
- Xi’an
Institute of Applied Optics, Xi’an 710065, China
| | - Ren Bai
- Medical
College, Xi’an International University, Xi’an 710077, China
| | - Zhaojin Yang
- Xi’an
Institute of Applied Optics, Xi’an 710065, China
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11
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Saniel MBB, Lim LHV, Lamorena RB. An Initial Study on the Feasibility of Using Rudimentary SERS in Quick Chemical Assessment of Ambient Aerosols. ChemistrySelect 2019. [DOI: 10.1002/slct.201903479] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Monica Blaise B. Saniel
- Institute of ChemistryCollege of ScienceNational Science ComplexUniversity of the Philippines-Diliman Quezon City Philippines 1101
| | - Len Herald V. Lim
- Institute of ChemistryCollege of ScienceNational Science ComplexUniversity of the Philippines-Diliman 1101 Quezon City Philippines
| | - Rheo B. Lamorena
- Institute of ChemistryCollege of ScienceNational Science ComplexUniversity of the Philippines-Diliman Quezon City Philippines 1101
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12
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A new cationic silver(I)/melamine coordination polymer, [Ag2(melamine)]2+: Synthesis, characterization and potential use for aqueous contaminant anion exchange. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2019.03.038] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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13
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The hybrid impact of modified low salinity water and anionic surfactant on oil expulsion from carbonate rocks: A dynamic approach. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.02.092] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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Kottakkat T, Klingan K, Jiang S, Jovanov ZP, Davies VH, El-Nagar GAM, Dau H, Roth C. Electrodeposited AgCu Foam Catalysts for Enhanced Reduction of CO 2 to CO. ACS APPLIED MATERIALS & INTERFACES 2019; 11:14734-14744. [PMID: 30933468 DOI: 10.1021/acsami.8b22071] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Selective electrochemical reduction of CO2 is an emerging field which needs more active and stable catalysts for its practicability. In this work, we have studied the influence of Ag metal incorporation into Cu dendritic structures on the product distribution and selectivity of CO2 electroreduction. Bimetallic AgCu foams prepared by hydrogen bubble templated electrodeposition shift the potentials of CO production to more positive values compared to bulk silver. The presence of Ag during the electrodeposition significantly changed the size and the shape of the dendrites in the pore walls of AgCu foams compared to Cu foam. The CO adsorption characteristics are studied by operando Raman spectroscopy. In the presence of Ag, the maximum CO adsorption is observed at a more positive potential. As a result, an improved selectivity for CO is obtained for AgCu foam catalysts at lower overpotentials compared to Cu foam catalyst, evidencing a synergistic effect between the bimetallic components. We were successful in increasing the CO mass activity with respect to the total Ag amount. AgCu foams are found to retain the CO selectivity during long-term operation, and with their easily scalable electrodeposition synthesis they possess high potential for industrial application.
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Affiliation(s)
- Tintula Kottakkat
- Institute of Chemistry and Biochemistry , Freie Universität Berlin , Takustr. 3 , 14195 Berlin , Germany
| | - Katharina Klingan
- Department of Physics , Freie Universität Berlin , Arnimallee 14 , 14195 Berlin , Germany
| | - Shan Jiang
- Department of Physics , Freie Universität Berlin , Arnimallee 14 , 14195 Berlin , Germany
| | - Zarko P Jovanov
- Department of Chemistry , Technische Universität Berlin , Straße des 17. Juni , 10623 Berlin , Germany
| | - Veronica H Davies
- Institute of Chemistry and Biochemistry , Freie Universität Berlin , Takustr. 3 , 14195 Berlin , Germany
| | - Gumaa A M El-Nagar
- Institute of Chemistry and Biochemistry , Freie Universität Berlin , Takustr. 3 , 14195 Berlin , Germany
| | - Holger Dau
- Department of Physics , Freie Universität Berlin , Arnimallee 14 , 14195 Berlin , Germany
| | - Christina Roth
- Institute of Chemistry and Biochemistry , Freie Universität Berlin , Takustr. 3 , 14195 Berlin , Germany
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15
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Kitanosono T, Xu P, Kobayashi S. Chiral Lewis acids integrated with single-walled carbon nanotubes for asymmetric catalysis in water. Science 2018; 362:311-315. [PMID: 30337405 DOI: 10.1126/science.aap7883] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 05/27/2018] [Accepted: 08/22/2018] [Indexed: 12/22/2022]
Abstract
The development of highly reactive and stereoselective catalytic systems is required not only to improve existing synthetic methods but also to invent distinct chemical reactions. Herein, a homogenized combination of nickel-based Lewis acid-surfactant-combined catalysts and single-walled carbon nanotubes is shown to exhibit substantial activity in water. In addition to the enhanced reactivity, stereoselective performance and long-term stability were demonstrated in asymmetric conjugate addition reactions of aldoximes to furnish chiral nitrones in high yields with excellent selectivities. The practical and straightforward application of the designed catalysts in water provides an expedient, environmentally benign, and highly efficient pathway to access optically active compounds.
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Affiliation(s)
- Taku Kitanosono
- Department of Chemistry, School of Science, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Pengyu Xu
- Department of Chemistry, School of Science, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shū Kobayashi
- Department of Chemistry, School of Science, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
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16
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Development of asymmetric supercapacitors with titanium carbide-reduced graphene oxide couples as electrodes. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2017.10.125] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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17
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Walia J, Guay JM, Krupin O, Variola F, Berini P, Weck A. Visible light driven plasmonic photochemistry on nano-textured silver. Phys Chem Chem Phys 2017; 20:238-246. [PMID: 29199757 DOI: 10.1039/c7cp07024a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Plasmon assisted generation of silver sulfate from dodecanethiol is demonstrated on a nano-textured silver substrate with a strong surface plasmon resonance in the visible range. The observed photo-physical processes are attributed to hot charge carriers that are generated from the excitation of surface plasmon resonances using 532 nm laser light. Excited charge carriers are responsible for cleaving the alkane chain, and for generating reactive oxygen species which rapidly photooxidize the exposed sulfur atoms. The ability to drive photochemical reactions with photon energies in the visible range rather than in the UV, on nano-textured silver surfaces, will enable researchers to study photochemical transformations for a wide variety of applications. The strong optical absorbance across the visible range, combined with the fact that the substrates can be fabricated over large areas, naturally makes them candidates for solar driven photochemical applications, and for large scale plasmonic reactors.
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Affiliation(s)
- Jaspreet Walia
- Centre for Research in Photonics, University of Ottawa, Ontario, Canada.
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18
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Li Z, Du Z, Sun K, He X, Chen B. Controllable fabrication of Ag-nanoplate-decorated PAN-nanopillar arrays and their application in surface-enhanced Raman scattering. RSC Adv 2017. [DOI: 10.1039/c7ra11102a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This article demonstrates a controllable and low-cost fabrication approach to large-scale flexible films with one side consisting of ordered and vertically aligned Ag-nanoplates assembled PAN-nanopillar arrays with high-density and uniform hot spots.
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Affiliation(s)
- Zhongbo Li
- College of Light-Textile Engineering and Art
- Anhui Agricultural University
- Hefei 230036
- China
- Key Laboratory of Materials Physics
| | - Zhaofang Du
- College of Light-Textile Engineering and Art
- Anhui Agricultural University
- Hefei 230036
- China
| | - Kexi Sun
- College of Physics and Electronic Information
- Luoyang Normal University
- Luoyang 471022
- China
| | - Xuan He
- Institute of Chemical Materials
- China Academy of Engineering Physics
- Mianyang 621900
- China
| | - Bensong Chen
- Key Laboratory of Materials Physics
- Key Laboratory of Nanomaterials and Nanotechnology
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei
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19
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Zuccaro L, Kern K, Balasubramanian K. Identifying chemical functionalization on individual carbon nanotubes and graphene by local vibrational fingerprinting. ACS NANO 2015; 9:3314-3323. [PMID: 25731644 DOI: 10.1021/acsnano.5b00479] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Chemical functionalization of carbon nanotubes (CNTs) and graphene allows for fine-tuning their physical and chemical properties to realize fascinating new fundamental phenomena as well as exotic applications. A primary challenge in such endeavors is the need to identify the chemical nature of attached functionalities at a single-nano-object level in a spatially resolved manner. Here we report the vibrational fingerprinting of functional groups that are attached to individual CNTs and graphene flakes. In order to achieve this, we decorate noncovalently functionalized CNTs and graphene with nanoparticles, which leads to the appearance of Raman peaks that can be correlated with the vibrational modes characteristic of the functional groups with diffraction-limited spatial resolution. The presented strategy is generic enough to be extended to other chemical modification routes on a range of nanostructures and hence will allow for rapid characterization of chemical modification of individual (semi)conducting nanostructures.
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Affiliation(s)
- Laura Zuccaro
- †Max Planck Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
| | - Klaus Kern
- †Max Planck Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
- §Institut de Physique de la Matière Condensée, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Kannan Balasubramanian
- †Max Planck Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
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