1
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Bakhmutov VI, Contreras-Ramirez A, Drake H, Zhou HC. On phosphorus chemical shift anisotropy in metal (IV) phosphates and phosphonates: A 31 P NMR experimental study. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2023; 61:16-21. [PMID: 36117432 DOI: 10.1002/mrc.5313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 09/14/2022] [Accepted: 09/14/2022] [Indexed: 06/15/2023]
Abstract
The phosphorus chemical shift anisotropies, 31 PΔcs, and asymmetry parameters η were measured by the 31 P{1 H} NMR experiments in static and low-frequency spinning samples of the zirconium phosphates and phosphonates and also in the mixed Zr (IV)/Sn (IV) phosphate/phosphonate material. The data obtained have shown a 111 connectivity in the HPO4 and PO3 groups, which does not change at modification and intercalation of the materials. The 31 PΔcs values of the phosphonate groups (43-49 ppm) significantly surpass the values characterizing the HPO4 groups (23-37 ppm). The 31 P Δcs values obtained for the metal (IV) phosphates were discussed in terms of P-O distances. The 31 P chemical shift anisotropy parameters can help at elucidation of local structures in phosphate and phosphonate materials.
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Affiliation(s)
| | | | - Hannah Drake
- Department of Chemistry, Texas A&M University, College Station, Texas, USA
| | - Hong-Cai Zhou
- Department of Chemistry, Texas A&M University, College Station, Texas, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas, USA
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2
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Pang Z, Yan W, Yang J, Li Q, Guo Y, Zhou D, Jiang X. Multifunctional Gold Nanoclusters for Effective Targeting, Near-Infrared Fluorescence Imaging, Diagnosis, and Treatment of Cancer Lymphatic Metastasis. ACS NANO 2022; 16:16019-16037. [PMID: 36130729 PMCID: PMC9620408 DOI: 10.1021/acsnano.2c03752] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Developing effective lymph-node (LN) targeting and imaging probes is crucial for the early detection and diagnosis of tumor metastasis to improve patient survival. Most current clinical LN imaging probes are based on small organic dyes (e.g., indocyanine green) or radioactive 99mTc-complexes, which often suffer from limitations, such as rapid photobleaching, poor signal contrast, and potential biosafety issues. Moreover, these probes cannot easily incorporate therapeutic functions to realize beneficial theranostics without affecting their LN-targeting ability. Herein, we have developed dual-ligand-/multiligand-capped gold nanoclusters (GNCs) for specific targeting, near-infrared (NIR) fluorescence imaging, diagnosis, and treatment of LN cancer metastasis in in vivo mouse models. By optimizing the surface ligand coating, we have prepared Au25(SR1)n(SR2)18-n (where SR1 and SR2 are different functional thiol ligands)-type GNCs, which display highly effective LN targeting, excellent stability and biocompatibility, and optimal body-retention time. Moreover, they can provide continuous NIR fluorescence imaging of LNs for >3 h from a single dose, making them well-suited for fluorescence-guided surgery. Importantly, we have further incorporated methotrexate, a chemotherapeutic drug, into the GNCs without affecting their LN-targeting ability. Consequently, they can significantly improve the efficiency of methotrexate delivery to target LNs, achieving excellent therapeutic efficacy with up to 4-fold lower hepatotoxicity. Thus, the GNCs are highly effective and safe theranostic nanomedicines against cancer lymphatic metastasis.
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Affiliation(s)
- Zeyang Pang
- Guangdong
Provincial Key Laboratory of Advanced Biomaterials and Shenzhen Key
Laboratory of Smart Healthcare Engineering, Department of Biomedical
Engineering, Southern University of Science
and Technology, No 1088, Xueyuan Rd, Nanshan District, Shenzhen, Guangdong 518055, P. R. China
- School
of Chemistry and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Weixiao Yan
- Guangdong
Provincial Key Laboratory of Advanced Biomaterials and Shenzhen Key
Laboratory of Smart Healthcare Engineering, Department of Biomedical
Engineering, Southern University of Science
and Technology, No 1088, Xueyuan Rd, Nanshan District, Shenzhen, Guangdong 518055, P. R. China
| | - Jie Yang
- Guangdong
Provincial Key Laboratory of Advanced Biomaterials and Shenzhen Key
Laboratory of Smart Healthcare Engineering, Department of Biomedical
Engineering, Southern University of Science
and Technology, No 1088, Xueyuan Rd, Nanshan District, Shenzhen, Guangdong 518055, P. R. China
| | - Qizhen Li
- Guangdong
Provincial Key Laboratory of Advanced Biomaterials and Shenzhen Key
Laboratory of Smart Healthcare Engineering, Department of Biomedical
Engineering, Southern University of Science
and Technology, No 1088, Xueyuan Rd, Nanshan District, Shenzhen, Guangdong 518055, P. R. China
| | - Yuan Guo
- School
of Food Science and Nutrition and Astbury Centre for Structural Molecular
Biology, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Dejian Zhou
- School
of Chemistry and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Xingyu Jiang
- Guangdong
Provincial Key Laboratory of Advanced Biomaterials and Shenzhen Key
Laboratory of Smart Healthcare Engineering, Department of Biomedical
Engineering, Southern University of Science
and Technology, No 1088, Xueyuan Rd, Nanshan District, Shenzhen, Guangdong 518055, P. R. China
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3
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Sharma NK, Vishwakarma J, Rai S, Alomar TS, AlMasoud N, Bhattarai A. Green Route Synthesis and Characterization Techniques of Silver Nanoparticles and Their Biological Adeptness. ACS OMEGA 2022; 7:27004-27020. [PMID: 35967040 PMCID: PMC9366950 DOI: 10.1021/acsomega.2c01400] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 07/13/2022] [Indexed: 05/13/2023]
Abstract
The development of the most reliable and green techniques for nanoparticle synthesis is an emerging step in the area of green nanotechnology. Many conventional approaches used for nanoparticle (NP) synthesis are expensive, deadly, and nonenvironmental. In this new era of nanotechnology, to overcome such concerns, natural sources which work as capping and reducing agents, including bacteria, fungi, biopolymers, and plants, are suitable candidates for synthesizing AgNPs. The surface morphology and applications of AgNPs are significantly pretentious to the experimental conditions by which they are synthesized. Available scattered information on the synthesis of AgNPs comprises the influence of altered constraints and characterization methods such as FTIR, UV-vis, DLS, SEM, TEM, XRD, EDX, etc. and their properties and applications. This review focuses on all the above-mentioned natural sources that have been used for AgNP synthesis recently. The green routes to synthesize AgNPs have established effective applications in various areas, including biosensors, magnetic resonance imaging (MRI), cancer treatment, surface-enhanced Raman spectroscopy (SERS), antimicrobial agents, drug delivery, gene therapy, DNA analysis, etc. The existing boundaries and prospects for metal nanoparticle synthesis by the green route are also discussed herein.
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Affiliation(s)
- Nitin Kumar Sharma
- Department
of Chemical Engineering, Indian Institute
of Technology, Kanpur 208016, India
- Shri
Maneklal M. Patel Institute of Sciences and Research, Kadi Sarva Vishwavidyalaya, Gandhinagar 382023, India
| | - Jyotsna Vishwakarma
- K. B.
Pharmacy Institute of Education and Research, Kadi Sarva Vishwavidyalaya, Gandhinagar 382023, India
| | - Summi Rai
- Department
of Chemistry, Mahendra Morang Adarsh Multiple Campus, Tribhuvan University, Biratnagar 56613, Nepal
| | - Taghrid S. Alomar
- Department
of Chemistry, College of Science, Princess
Nourah bint Abdulrahman University, Riyadh 11671, Saudi Arabia
| | - Najla AlMasoud
- Department
of Chemistry, College of Science, Princess
Nourah bint Abdulrahman University, Riyadh 11671, Saudi Arabia
| | - Ajaya Bhattarai
- Department
of Chemistry, Mahendra Morang Adarsh Multiple Campus, Tribhuvan University, Biratnagar 56613, Nepal
- or
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4
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Pellizzoni E, Şologan M, Daka M, Pengo P, Marson D, Posel Z, Franchi S, Bignardi L, Franchi P, Lucarini M, Posocco P, Pasquato L. Thiolate end-group regulates ligand arrangement, hydration and affinity for small compounds in monolayer-protected gold nanoparticles. J Colloid Interface Sci 2021; 607:1373-1381. [PMID: 34583042 DOI: 10.1016/j.jcis.2021.09.083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 09/15/2021] [Accepted: 09/16/2021] [Indexed: 11/30/2022]
Abstract
The ability to control the properties of monolayer protected gold nanoparticles (MPNPs) discloses unrevealed features stemming from collective properties of the ligands forming the monolayer and presents opportunities to design new materials. To date, the influence of ligand end-group size and capacity to form hydrogen bonds on structure and hydration of small MPNPs (<5 nm) has been poorly studied. Here, we show that both features determine ligands order, solvent accessibility, capacity to host hydrophobic compounds and interfacial properties of MPNPs. The polarity perceived by a radical probe and its binding constant with the monolayer investigated by electron spin resonance is rationalized by molecular dynamics simulations, which suggest that larger space-filling groups - trimethylammonium, zwitterionic and short polyethylene glycol - favor a radial organization of the thiolates, whereas smaller groups - as sulfonate - promote the formation of bundles. Zwitterionic ligands create a surface network of hydrogen bonds, which affects nanoparticle hydrophobicity and maximize the partition equilibrium constant of the probe. This study discloses the role of the chemistry of the end-group on monolayer features with effects that span from molecular- to nano-scale and opens the door to a shift in the conception of new MPNPs exploiting the end-group as a novel design motif.
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Affiliation(s)
- Elena Pellizzoni
- Department of Chemical and Pharmaceutical Sciences and INSTM Trieste Research Unit, University of Trieste, 34127 Trieste, (Italy)
| | - Maria Şologan
- Department of Chemical and Pharmaceutical Sciences and INSTM Trieste Research Unit, University of Trieste, 34127 Trieste, (Italy)
| | - Mario Daka
- Department of Chemical and Pharmaceutical Sciences and INSTM Trieste Research Unit, University of Trieste, 34127 Trieste, (Italy)
| | - Paolo Pengo
- Department of Chemical and Pharmaceutical Sciences and INSTM Trieste Research Unit, University of Trieste, 34127 Trieste, (Italy)
| | - Domenico Marson
- Department of Engineering and Architecture, University of Trieste, 34127 Trieste, (Italy)
| | - Zbyšek Posel
- Department of Engineering and Architecture, University of Trieste, 34127 Trieste, (Italy); Department of Informatics, Jan Evangelista Purkyně University, 400 96 Ústínad Labem, (Czech Republic)
| | - Stefano Franchi
- Elettra Sincrotrone Trieste S.C.p.A., 34149 Trieste, (Italy)
| | - Luca Bignardi
- Department of Physics, University of Trieste, 34127 Trieste, (Italy)
| | - Paola Franchi
- Department of Chemistry "G. Ciamician", University of Bologna, I-40126 Bologna, (Italy)
| | - Marco Lucarini
- Department of Chemistry "G. Ciamician", University of Bologna, I-40126 Bologna, (Italy).
| | - Paola Posocco
- Department of Engineering and Architecture, University of Trieste, 34127 Trieste, (Italy).
| | - Lucia Pasquato
- Department of Chemical and Pharmaceutical Sciences and INSTM Trieste Research Unit, University of Trieste, 34127 Trieste, (Italy).
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5
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Lee H, Nakamura S, Imoto H, Naka K. Reversible pH Responsive Aggregation Behavior of Size-Controlled Calcium Carbonate Composite Nanoparticles by Phytic Acid in Aqueous Solution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:7712-7719. [PMID: 34024095 DOI: 10.1021/acs.langmuir.1c00744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Composite colloidal nanoparticles were prepared by a carbonate controlled-addition method in the presence of phytic acid, in which an aqueous ammonium carbonate solution was added into an aqueous solution of phytic acid and CaCl2. The number-average particle size of the colloidal particles was 76 ± 18 nm formed by using the molar ratio [phytic acid]/[Ca2+] = 0.5 from the complexation time of 1 h. The composite nanoparticles were stable for more than 5 days in the suspension under the quiescent condition. After isolation of the nanoparticles by ultrafiltration, the dried samples could be redispersed in water. Effects of the complexation times of the aqueous solution of phytic acid and CaCl2 and the molar ratio ([phytic acid]/[Ca2+]) were studied. Increasing the concentration of the calcium reagents as well as increasing the complexation times increased the particle sizes. The minimum and maximum average particle sizes of 29 and 142 nm were obtained. The plot of the transmittance at 350 nm of the aqueous solution of the dispersion against pH values after addition of 0.05 M HCl for 6 h showed that, by gradually increasing turbidity with decreasing pH from 9.6 to 7.3, precipitates were recognized at below pH 7.5, and turbidity decreased with further decreasing pH beyond 7.2. Dynamic light scattering analysis showed that the particle diameters increased from 90 to 200 nm with decreasing pH from 9.6 to 7.2. When increasing the pH from 6.2, the precipitate was redispersed and the turbidity increased to a pH of 7.4. No precipitates were observed above a pH of 7.4. These results suggest that the present phytic acid stabilized nanoparticles exhibit pH-dependent reversible precipitation and redispersion without degradation under slightly acidic conditions.
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Affiliation(s)
- Haekyung Lee
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Shiho Nakamura
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
- Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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6
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Zheng L, Peng D, Zhang S, Yang Y, Zhang L, Meng P. Adsorption of sulfamethoxazole and sulfadiazine on phosphorus-containing stalk cellulose under different water pH studied by quantitative evaluation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:43246-43261. [PMID: 32734543 DOI: 10.1007/s11356-020-10241-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 07/20/2020] [Indexed: 06/11/2023]
Abstract
To improve the high-value application of corn stalk, phosphorus-containing stalk cellulose (PFC) was prepared, characterized, and utilized for the adsorption of sulfamethoxazole (SMZ) and sulfadiazine (SD), with maximum adsorption capacities of 1.385 and 2.527 mg/g at pH 7. As expected, the adsorption efficiency of PFC was strongly affected by pH, and the preferential adsorption order of SMZ- (SD0) > SMZ0 (SD-) > SMZ+ (SD+) was obtained from the experimental results and due to the charges of PFC and the SMZ and SD species. Furthermore, these results were qualitatively linked to the adsorption mechanism, e.g., π+-π electron donor-acceptor (EDA), anion-π bond electrostatic, and hydrophobic interactions. In particular, the adsorption mechanism was further characterized in terms of structure and analyzed systematically using density functional theory (DFT), frontier orbital theory (FOT), and molecular dynamics (MD) simulation, with the aim to explain the theoretical calculation and experimental results. As a result, the highest occupied molecular orbital (HOMO)-lowest unoccupied molecular orbital (LUMO) orbitals revealed the key role of the rings and functional groups of PFC and SMZ (or SD) and validated the optimized structures of PFC+ sulfonamides (SAs)+, PFC- SAs0, and PFC- SAs-, in which their binding energy values, energy gaps, and relevant molecular lengths determined their stability. Additionally, the van der Waals (vdW) energy confirmed the effect of various interactions on adsorption.
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Affiliation(s)
- Liuchun Zheng
- School of Environment, South China Normal University, Guangzhou Higher Education Mega Center, Guangzhou, 510006, People's Republic of China.
- Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou, 510006, People's Republic of China.
| | - Dan Peng
- Department of Transportation and Environment, Shenzhen Institute of Information Technology, Shenzhen, 518172, People's Republic of China
| | - Shiping Zhang
- School of Chemistry and Environment, South China Normal University, Guangzhou Higher Education Mega Center, Guangzhou, 510006, People's Republic of China
| | - Yuebei Yang
- School of Environment, South China Normal University, Guangzhou Higher Education Mega Center, Guangzhou, 510006, People's Republic of China
| | - Lijuan Zhang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, People's Republic of China
| | - Peipei Meng
- College of Environment, Jinan University, Guangzhou, 510632, People's Republic of China
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7
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Moreno JM, Velty A, Díaz U. MOFs based on 1D structural sub-domains with Brønsted acid and redox active sites as effective bi-functional catalysts. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00235f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Low-dimensional MOF-type catalysts containing Brønsted acid and redox active sites, based on assembled 1D organic–inorganic nanoribbons, for one-pot two-step reactions.
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Affiliation(s)
- José María Moreno
- Instituto de Tecnología Química
- Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas
- E-46022 Valencia
- Spain
| | - Alexandra Velty
- Instituto de Tecnología Química
- Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas
- E-46022 Valencia
- Spain
| | - Urbano Díaz
- Instituto de Tecnología Química
- Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas
- E-46022 Valencia
- Spain
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8
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García Grajeda BA, Aguila SA, Peinado Guevara H, Reynoso-Soto E, Ochoa-Terán A, Trujillo-Navarrete B, Cruz Enríquez A, Campos-Gaxiola JJ. Colorimetric and rapid determination of Cr(III) ions in water samples using AuNPs modified with 11-mercaptoundecyl phosphonic acid: spectroscopic characterization and reaction mechanism. INORG NANO-MET CHEM 2018. [DOI: 10.1080/24701556.2018.1503680] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Blanca A. García Grajeda
- Facultad de Ingeniería Mochis, Universidad Autónoma de Sinaloa, C.U. Los Mochis, Sinaloa, México
| | - Sergio A. Aguila
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México (CNyN-UNAM), Ensenada, Baja California, México
| | - Héctor Peinado Guevara
- Facultad de Ingeniería Mochis, Universidad Autónoma de Sinaloa, C.U. Los Mochis, Sinaloa, México
| | - Edgar Reynoso-Soto
- Centro de Graduados e Investigación, Instituto Tecnológico de Tijuana, Tijuana, México
| | - Adrián Ochoa-Terán
- Centro de Graduados e Investigación, Instituto Tecnológico de Tijuana, Tijuana, México
| | | | - Adriana Cruz Enríquez
- Facultad de Ingeniería Mochis, Universidad Autónoma de Sinaloa, C.U. Los Mochis, Sinaloa, México
| | - José J. Campos-Gaxiola
- Facultad de Ingeniería Mochis, Universidad Autónoma de Sinaloa, C.U. Los Mochis, Sinaloa, México
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9
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Piveteau L, Ong TC, Walder BJ, Dirin DN, Moscheni D, Schneider B, Bär J, Protesescu L, Masciocchi N, Guagliardi A, Emsley L, Copéret C, Kovalenko MV. Resolving the Core and the Surface of CdSe Quantum Dots and Nanoplatelets Using Dynamic Nuclear Polarization Enhanced PASS-PIETA NMR Spectroscopy. ACS CENTRAL SCIENCE 2018; 4:1113-1125. [PMID: 30276244 PMCID: PMC6161058 DOI: 10.1021/acscentsci.8b00196] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Indexed: 05/05/2023]
Abstract
Understanding the surface of semiconductor nanocrystals (NCs) prepared using colloidal methods is a long-standing goal of paramount importance for all their potential optoelectronic applications, which remains unsolved largely because of the lack of site-specific physical techniques. Here, we show that multidimensional 113Cd dynamic nuclear polarization (DNP) enhanced NMR spectroscopy allows the resolution of signals originating from different atomic and magnetic surroundings in the NC cores and at the surfaces. This enables the determination of the structural perfection, and differentiation between the surface and core atoms in all major forms of size- and shape-engineered CdSe NCs: irregularly faceted quantum dots (QDs) and atomically flat nanoplatelets, including both dominant polymorphs (zinc-blende and wurtzite) and their epitaxial nanoheterostructures (CdSe/CdS core/shell quantum dots and CdSe/CdS core/crown nanoplatelets), as well as magic-sized CdSe clusters. Assignments of the NMR signals to specific crystal facets of oleate-terminated ZB structured CdSe NCs are proposed. Significantly, we discover far greater atomistic complexity of the surface structure and the species distribution in wurtzite as compared to zinc-blende CdSe QDs, despite an apparently identical optical quality of both QD polymorphs.
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Affiliation(s)
- Laura Piveteau
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
- Empa-Swiss
Federal Laboratories for Materials Science and Technology, Dübendorf, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Ta-Chung Ong
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Brennan J. Walder
- Institut
des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale
de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Dmitry N. Dirin
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
- Empa-Swiss
Federal Laboratories for Materials Science and Technology, Dübendorf, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Daniele Moscheni
- Dipartimento
di Scienza e Alta Tecnologia and To.Sca.Lab, Università dell’Insubria, via Valleggio 11, I-22100 Como, Italy
| | - Barbara Schneider
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Janine Bär
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Loredana Protesescu
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
- Empa-Swiss
Federal Laboratories for Materials Science and Technology, Dübendorf, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Norberto Masciocchi
- Dipartimento
di Scienza e Alta Tecnologia and To.Sca.Lab, Università dell’Insubria, via Valleggio 11, I-22100 Como, Italy
| | - Antonietta Guagliardi
- Dipartimento
di Scienza e Alta Tecnologia and To.Sca.Lab, Università dell’Insubria, via Valleggio 11, I-22100 Como, Italy
- Istituto
di Crystallografia and To.Sca.Lab, Consiglio Nazionale delle Ricerche, via Valleggio 11, I-22100 Como, Italy
| | - Lyndon Emsley
- Institut
des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale
de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Christophe Copéret
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
- E-mail:
| | - Maksym V. Kovalenko
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
- Empa-Swiss
Federal Laboratories for Materials Science and Technology, Dübendorf, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
- E-mail:
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10
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Synthesis and characterization of decyl phosphonic acid, applications in emulsion polymerization and anti-corrosion coating. KOREAN J CHEM ENG 2018. [DOI: 10.1007/s11814-018-0041-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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11
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Wang WY, Zhao XF, Ju XH, Liu P, Li J, Tang YW, Li SP, Li XD, Song FG. Induction of Au-methotrexate conjugates by sugar molecules: production, assembly mechanism, and bioassay studies. Int J Pharm 2018; 538:65-78. [PMID: 29341908 DOI: 10.1016/j.ijpharm.2017.12.051] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 12/23/2017] [Accepted: 12/31/2017] [Indexed: 01/12/2023]
Abstract
Au-methotrexate (Au-MTX) conjugates induced by sugar molecules were produced by a simple, one-pot, hydrothermal growth method. Herein, the Au(III)-MTX complexes were used as the precursors to form Au-MTX conjugates. Addition of different types of sugar molecules with abundant hydroxyl groups resulted in the formation of Au-MTX conjugates featuring distinct characteristics that could be explained by the diverse capping mechanisms of sugar molecules. That is, the instant-capping mechanism of glucose favored the generation of peanut-like Au-MTX conjugates with high colloidal stability while the post-capping mechanism of dextran and sucrose resulted in the production of Au-MTX conjugates featuring excellent near-infrared (NIR) optical properties with a long-wavelength plasmon resonance near 630-760 nm. Moreover, in vitro bioassays showed that cancer cell viabilities upon incubation with free MTX, Au-MTX conjugates doped with glucose, dextran and sucrose for 48 h were 74.6%, 55.0%, 62.0%, and 63.1%, respectively. Glucose-doped Au-MTX conjugates exhibited a higher anticancer activity than those doped with dextran and sucrose, therefore potentially presenting a promising treatment platform for anticancer therapy. Based on the present study, this work may provide the first example of using biocompatible sugars as regulating agents to effectively guide the shape and assembly behavior of Au-MTX conjugates. Potentially, the synergistic strategy of drug molecules and sugar molecules may offer the possibility to create more gold-based nanocarriers with new shapes and beneficial features for advanced anticancer therapy.
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Affiliation(s)
- Wei-Yuan Wang
- Jiangsu Key Laboratory of Biofunctional Material, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Xiu-Fen Zhao
- Jiangsu Key Laboratory of Biofunctional Material, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Xiao-Han Ju
- Jiangsu Key Laboratory of Biofunctional Material, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Ping Liu
- Jiangsu Key Laboratory of Biofunctional Material, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Jing Li
- Jiangsu Key Laboratory of Biofunctional Material, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Ya-Wen Tang
- Jiangsu Key Laboratory of Biofunctional Material, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Shu-Ping Li
- Jiangsu Key Laboratory of Biofunctional Material, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China; Shandong Bingkun Tengtai Ceramics Technology Co. Ltd., Zibo 255321, China.
| | - Xiao-Dong Li
- Jiangsu Key Laboratory of Biofunctional Material, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Fu-Gui Song
- Shandong Bingkun Tengtai Ceramics Technology Co. Ltd., Zibo 255321, China
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Benyettou F, Alhashimi M, O'Connor M, Pasricha R, Brandel J, Traboulsi H, Mazher J, Olsen JC, Trabolsi A. Sequential Delivery of Doxorubicin and Zoledronic Acid to Breast Cancer Cells by CB[7]-Modified Iron Oxide Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2017; 9:40006-40016. [PMID: 29035507 DOI: 10.1021/acsami.7b11423] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Drug-loaded magnetic nanoparticles were synthesized and used for the sequential delivery of the antiresorptive agent zoledronic acid (Zol) and the cytotoxic drug doxorubicin (Dox) to breast cancer cells (MCF-7). Zol was attached to bare iron oxide nanoparticles (IONPs) via phosphonate coordination to form Z-NPs. The unbound imidazole of Zol was then used to complex the organic macrocycle CB[7] to obtain CZ-NPs. Dox was complexed to the CZ-NPs to form the fully loaded particles (DCZ-NPs), which were stable in solution at 37 °C and physiological pH (7.4). Fluorescence spectroscopy established that Dox is released in solution from DCZ-NPs suddenly (i) when the particles are subjected to magnetically induced heating to 42 °C at low pH (5.0) and (ii) in the presence of glutathione (GSH). Mass spectrometry indicated that Zol is released slowly in solution at low pH after Dox release. Magnetic measurements with a magnetic reader revealed that DCZ-NPs are internalized preferentially by MCF-7 cells versus nonmalignant cells (HEK293). Zol and Dox acted synergistically when delivered by the particles. DCZ-NPs caused a decrease in the viability of MCF-7 cells that was greater than the net decrease caused when the drugs were added to the cells individually at concentrations equivalent to those delivered by the particles. MCF-7 cells were treated with DCZ-NPs and subjected to an alternating magnetic field (AMF) which, with the nanoparticles present, raised the temperature of the cells and triggered the intracellular release of Dox, as indicated by fluorescence activated cell sorting (FACS). The cytotoxic effects of the DCZ-NPs on MCF-7 cells were enhanced 10-fold by AMF-induced heating. DCZ-NPs were also able to completely inhibit MCF-7 cell adhesion and invasion in vitro, indicating the potential of the particles to act as antimetastatic agents. Together these results demonstrate that DCZ-NPs warrant development as a system for combined chemo- and thermo-therapeutic treatment of cancer.
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Affiliation(s)
- Farah Benyettou
- New York University Abu Dhabi , P.O. Box 129188, Abu Dhabi, United Arab Emirates
| | - Marwa Alhashimi
- New York University Abu Dhabi , P.O. Box 129188, Abu Dhabi, United Arab Emirates
| | - Matthew O'Connor
- New York University Abu Dhabi , P.O. Box 129188, Abu Dhabi, United Arab Emirates
| | - Renu Pasricha
- New York University Abu Dhabi , P.O. Box 129188, Abu Dhabi, United Arab Emirates
| | - Jeremy Brandel
- Equipe Reconnaissance et Procédés de Séparation Moléculaire, Université de Strasbourg , 67037 Strasbourg, France
| | - Hassan Traboulsi
- Chemistry Department, College of Sciences, King Faisal University-Al Ahsa , Hofuf 31982, Kingdom of Saudi Arabia
| | - Javed Mazher
- Physics Department, College of Sciences, King Faisal University-Al Ahsa , Hofuf 31982, Kingdom of Saudi Arabia
| | - John-Carl Olsen
- Department of Chemistry, University of Rochester RC 27021 , Rochester, New York 14607-0216, United States
| | - Ali Trabolsi
- New York University Abu Dhabi , P.O. Box 129188, Abu Dhabi, United Arab Emirates
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13
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Asakawa H, Inada N, Hirata K, Matsui S, Igarashi T, Oku N, Yoshikawa N, Fukuma T. Self-assembled monolayers of sulfonate-terminated alkanethiols investigated by frequency modulation atomic force microscopy in liquid. NANOTECHNOLOGY 2017; 28:455603. [PMID: 28876225 DOI: 10.1088/1361-6528/aa8aa7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A molecular-scale understanding of self-assembled monolayers (SAMs) of sulfonate-terminated alkanethiols is crucial for interfacial studies of functionalized SAMs and their various applications. However, such an understanding has been difficult to achieve because of the lack of direct information on these molecular-scale structures in real space. In this study, we investigated the structures of sulfonate SAMs of sodium 11-mercapto-1-undecanesulfonate (MUS) by frequency modulation atomic force microscopy (FM-AFM) in liquid. The subnanometer-resolution FM-AFM images showed that the single-component MUS SAM prepared in pure water had random surface structures. In contrast, the MUS SAM prepared in a water-ethanol mixed solvent showed periodic striped structures with a flat-lying conformation. The results suggest a significant solvent effect on molecular-scale structures of long-chain sulfonate SAMs. In addition, we investigated the molecular-scale structures of mixed SAMs of MUS and 11-mercapto-1-undecanol (MUO) with alkane chains of the same length. The FM-AFM images of the mixed SAMs showed clear phase separation between MUS SAM and MUO SAM domains. In the MUO SAM domains, the incorporated MUS molecules appeared as protrusions. The results obtained in this study provide direct structural information on long-chain sulfonate and mixed SAMs.
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Affiliation(s)
- Hitoshi Asakawa
- Division of Material Chemistry, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan. Bio-AFM Frontier Research Center, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan. PRESTO, JST, Kawaguchi, 332-0012, Japan
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14
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García Grajeda BA, Soto Acosta SG, Aguila SA, Guevara HP, Díaz-García ME, Enríquez AC, Campos-Gaxiola JJ. Selective and colorimetric detection of Ba2+ ions in aqueous solutions using 11-mercaptoundecylphosphonic acid functionalized gold nanoparticles. RSC Adv 2017. [DOI: 10.1039/c7ra03861e] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this paper we describe a simple colorimetric method for the sensitive and selective detection of Ba2+ ions, using 11-mercaptoundecylphosphonic acid functionalized gold nanoparticles (AuNPs–MPA) in aqueous solution.
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Affiliation(s)
| | | | - Sergio A. Aguila
- Centro de Nanociencias y Nanotecnología
- Universidad Nacional Autónoma de México (CNyN-UNAM)
- Ensenada
- México
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15
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Wang WY, Zhao XF, Ju XH, Wang Y, Wang L, Li SP, Li XD. Novel morphology change of Au-Methotrexate conjugates: From nanochains to discrete nanoparticles. Int J Pharm 2016; 515:221-232. [DOI: 10.1016/j.ijpharm.2016.10.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 10/04/2016] [Accepted: 10/09/2016] [Indexed: 01/14/2023]
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16
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Girard P, Hémez J, Silvestre V, Labrugère C, Lartigue L, Duvail JL, Ishow E. Strong Color Tuning of Self-Assembled Azo-Derived Phosphonic Acids upon Hydrogen Bonding. CHEMPHOTOCHEM 2016. [DOI: 10.1002/cptc.201600014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Pauline Girard
- CEISAM-UMR CNRS 6230; Université de Nantes; 2 rue de la Houssinière 44322 Nantes France
- IMN-UMR CNRS 6502; Université de Nantes; 44322 Nantes France
| | - Julie Hémez
- CEISAM-UMR CNRS 6230; Université de Nantes; 2 rue de la Houssinière 44322 Nantes France
| | - Virginie Silvestre
- CEISAM-UMR CNRS 6230; Université de Nantes; 2 rue de la Houssinière 44322 Nantes France
| | - Christine Labrugère
- PLACAMAT-UMS 3626; CNRS-Université de Bordeaux; 87 avenue Albert Schweitzer 33608 Pessac France
| | - Lénaïc Lartigue
- CEISAM-UMR CNRS 6230; Université de Nantes; 2 rue de la Houssinière 44322 Nantes France
| | - Jean-Luc Duvail
- IMN-UMR CNRS 6502; Université de Nantes; 44322 Nantes France
| | - Eléna Ishow
- CEISAM-UMR CNRS 6230; Université de Nantes; 2 rue de la Houssinière 44322 Nantes France
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17
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Burrows ND, Lin W, Hinman JG, Dennison JM, Vartanian AM, Abadeer NS, Grzincic EM, Jacob LM, Li J, Murphy CJ. Surface Chemistry of Gold Nanorods. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:9905-9921. [PMID: 27568788 DOI: 10.1021/acs.langmuir.6b02706] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Gold nanorods have garnered a great deal of scientific interest because of their unique optical properties, and they have the potential to greatly impact many areas of science and technology. Understanding the structure and chemical makeup of their surfaces as well as how to tailor them is of paramount importance in the development of their successful applications. This Feature Article reviews the current understanding of the surface chemistry of as-synthesized gold nanorods, methods of tailoring the surface chemistry of gold nanorods with various inorganic and organic coatings/ligands, and the techniques employed to characterize ligands on the surface of gold nanorods as well as the associated measurement challenges. Specifically, we address the challenges of determining how thick the ligand shell is, how many ligands per nanorod are present on the surface, and where the ligands are located in regiospecific and mixed-ligand systems. We conclude with an outlook on the development of the surface chemistry of gold nanorods leading to the development of a synthetic nanoparticle surface chemistry toolbox analogous to that of synthetic organic chemistry and natural product synthesis.
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Affiliation(s)
- Nathan D Burrows
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Wayne Lin
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Joshua G Hinman
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Jordan M Dennison
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Ariane M Vartanian
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Nardine S Abadeer
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Elissa M Grzincic
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Lisa M Jacob
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Ji Li
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Catherine J Murphy
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
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18
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19
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Jacques A, Barthélémy B, Delhalle J, Mekhalif Z. 1-Pyrrolyl-10-decylammoniumphosphonate monolayer: a molecular nanolink between electropolymerized pyrrole films and nickel or titanium surfaces. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.04.123] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Immobilization and electrocatalysis of Ru(III) ions on phosphonate functionalized gold nanoparticles. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.01.089] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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21
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Ramimoghadam D, Bagheri S, Abd Hamid SB. Stable monodisperse nanomagnetic colloidal suspensions: An overview. Colloids Surf B Biointerfaces 2015; 133:388-411. [PMID: 26073507 DOI: 10.1016/j.colsurfb.2015.02.003] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2014] [Revised: 01/19/2015] [Accepted: 02/01/2015] [Indexed: 12/29/2022]
Abstract
Magnetic iron oxide nanoparticles (MNPs) have emerged as highly desirable nanomaterials in the context of many research works, due to their extensive industrial applications. However, they are prone to agglomerate on account of the anisotropic dipolar attraction, and therefore misled the particular properties related to single-domain magnetic nanostructures. The surface modification of MNPs is quite challenging for many applications, as it involves surfactant-coating for steric stability, or surface modifications that results in repulsive electrostatic force. Hereby, we focus on the dispersion of MNPs and colloidal stability.
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Affiliation(s)
- Donya Ramimoghadam
- Nanotechnology & Catalysis Research Centre (NANOCAT), IPS Building, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Samira Bagheri
- Nanotechnology & Catalysis Research Centre (NANOCAT), IPS Building, University of Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Sharifah Bee Abd Hamid
- Nanotechnology & Catalysis Research Centre (NANOCAT), IPS Building, University of Malaya, 50603 Kuala Lumpur, Malaysia
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22
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Benyettou F, Rezgui R, Ravaux F, Jaber T, Blumer K, Jouiad M, Motte L, Olsen JC, Platas-Iglesias C, Magzoub M, Trabolsi A. Synthesis of silver nanoparticles for the dual delivery of doxorubicin and alendronate to cancer cells. J Mater Chem B 2015; 3:7237-7245. [DOI: 10.1039/c5tb00994d] [Citation(s) in RCA: 94] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We present the synthesis of a silver nanoparticle (AgNP) based drug-delivery system that achieves the simultaneous intracellular delivery of doxorubicin (Dox) and alendronate (Ald) and improves the anticancer therapeutic indices of both drugs.
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Affiliation(s)
- F. Benyettou
- New York University Abu Dhabi
- Abu Dhabi
- United Arab Emirates
| | - R. Rezgui
- New York University Abu Dhabi
- Abu Dhabi
- United Arab Emirates
| | - F. Ravaux
- Masdar Institute of Science and Technology
- Department of Mechanical and Materials Engineering
- Abu Dhabi
- United Arab Emirates
| | - T. Jaber
- New York University Abu Dhabi
- Abu Dhabi
- United Arab Emirates
| | - K. Blumer
- New York University Abu Dhabi
- Abu Dhabi
- United Arab Emirates
| | - M. Jouiad
- Masdar Institute of Science and Technology
- Department of Mechanical and Materials Engineering
- Abu Dhabi
- United Arab Emirates
| | - L. Motte
- Université Paris 13
- Sorbonne Paris Cité
- Laboratoire CSPBAT
- CNRS
- (UMR 7244)
| | - J.-C. Olsen
- School of Sciences
- Indiana University Kokomo
- Kokomo
- USA
| | - C. Platas-Iglesias
- Departamento de Química Fundamental
- Universidade da Coruña
- 15008 A Coruna
- Spain
| | - M. Magzoub
- New York University Abu Dhabi
- Abu Dhabi
- United Arab Emirates
| | - A. Trabolsi
- New York University Abu Dhabi
- Abu Dhabi
- United Arab Emirates
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23
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Rodríguez-Castillo M, Laurencin D, Tielens F, van der Lee A, Clément S, Guari Y, Richeter S. Reactivity of gold nanoparticles towards N-heterocyclic carbenes. Dalton Trans 2014; 43:5978-82. [PMID: 24435042 DOI: 10.1039/c3dt53579g] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The reaction of gold nanoparticles with benzimididazol-2-ylidene ligands leads to the formation of well-defined bis-carbene gold(i) complexes, as shown by characterization techniques such as powder XRD and solid state NMR.
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Affiliation(s)
- María Rodríguez-Castillo
- Institut Charles Gerhardt Montpellier ICGM, UMR5253 CNRS-ENSCM-UM2-UM1, Place E. Bataillon, CC1701, 34095 Montpellier Cedex 05, France.
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24
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Bonhomme C, Gervais C, Laurencin D. Recent NMR developments applied to organic-inorganic materials. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2014; 77:1-48. [PMID: 24411829 DOI: 10.1016/j.pnmrs.2013.10.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Accepted: 10/17/2013] [Indexed: 06/03/2023]
Abstract
In this contribution, the latest developments in solid state NMR are presented in the field of organic-inorganic (O/I) materials (or hybrid materials). Such materials involve mineral and organic (including polymeric and biological) components, and can exhibit complex O/I interfaces. Hybrids are currently a major topic of research in nanoscience, and solid state NMR is obviously a pertinent spectroscopic tool of investigation. Its versatility allows the detailed description of the structure and texture of such complex materials. The article is divided in two main parts: in the first one, recent NMR methodological/instrumental developments are presented in connection with hybrid materials. In the second part, an exhaustive overview of the major classes of O/I materials and their NMR characterization is presented.
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Affiliation(s)
- Christian Bonhomme
- Laboratoire de Chimie de la Matière Condensée de Paris, UMR CNRS 7574, Université Pierre et Marie Curie, Paris 06, Collège de France, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France.
| | - Christel Gervais
- Laboratoire de Chimie de la Matière Condensée de Paris, UMR CNRS 7574, Université Pierre et Marie Curie, Paris 06, Collège de France, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France
| | - Danielle Laurencin
- Institut Charles Gerhardt de Montpellier, UMR5253, CNRS UM2 UM1 ENSCM, CC1701, Place Eugène Bataillon, 34095 Montpellier Cedex 05, France
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25
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Peña L, Hohn KL, Li J, Sun XS, Wang D. Synthesis of Propyl-Sulfonic Acid-Functionalized Nanoparticles as Catalysts for Cellobiose Hydrolysis. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/jbnb.2014.54028] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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26
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Li P, Liu H, Yang J, Sun D, Chen Y, Zhou Y, Cai C, Lu T. A ruthenium(iii) phosphonate complex on polyallylamine functionalized carbon nanotube multilayer films: self-assembly, direct electrochemistry, and electrocatalysis. J Mater Chem B 2014; 2:102-109. [DOI: 10.1039/c3tb21433h] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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27
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Zhu L, Gu Q, Sun P, Chen W, Wang X, Xue G. Characterization of the mobility and reactivity of water molecules on TiO2 nanoparticles by 1H solid-state nuclear magnetic resonance. ACS APPLIED MATERIALS & INTERFACES 2013; 5:10352-10356. [PMID: 24060268 DOI: 10.1021/am403449j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Understanding interfacial water behavior is essential to improving our understanding of the surface chemistry and interfacial properties of nanomaterials. Here using 1H solid-state nuclear magnetic resonance (1H SSNMR), we successfully monitored ligand exchange reaction between oleylamine (OLA) and adsorbed water on titanium dioxide nanoparticles (TiO2 NPs). Three different types of interfacial waters with different reactivities were distinguished. The mobility of the adsorbed water molecules was characterized by dipolar filtered 1H SSNMR. Our experimental results demonstrate that the adsorbed water can be categorized into three different layers: (i) rigid water species with restricted mobility closest to the surface of TiO2 NPs, (ii) less mobile water species weakly confined on TiO2 NPs, and (iii) water molecules with high mobility. Water in the third layer could be replaced by OLA, while water in the first and second layers remained intact. The finding that the interfacial water with the highest mobility has the strongest reactivity has guiding significance for tailoring the hydrophilic and hydrophobic properties of TiO2 NPs.
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Affiliation(s)
- Lili Zhu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, The State Key Laboratory of Coordination Chemistry, Nanjing University , Nanjing 210093, P. R. Chin a
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28
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Baer DR, Engelhard MH, Johnson GE, Laskin J, Lai J, Mueller K, Munusamy P, Thevuthasan S, Wang H, Washton N, Elder A, Baisch BL, Karakoti A, Kuchibhatla SVNT, Moon D. Surface characterization of nanomaterials and nanoparticles: Important needs and challenging opportunities. JOURNAL OF VACUUM SCIENCE & TECHNOLOGY. A, VACUUM, SURFACES, AND FILMS : AN OFFICIAL JOURNAL OF THE AMERICAN VACUUM SOCIETY 2013; 31:50820. [PMID: 24482557 PMCID: PMC3869349 DOI: 10.1116/1.4818423] [Citation(s) in RCA: 106] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2013] [Accepted: 07/25/2013] [Indexed: 05/17/2023]
Abstract
This review examines characterization challenges inherently associated with understanding nanomaterials and the roles surface and interface characterization methods can play in meeting some of the challenges. In parts of the research community, there is growing recognition that studies and published reports on the properties and behaviors of nanomaterials often have reported inadequate or incomplete characterization. As a consequence, the true value of the data in these reports is, at best, uncertain. With the increasing importance of nanomaterials in fundamental research and technological applications, it is desirable that researchers from the wide variety of disciplines involved recognize the nature of these often unexpected challenges associated with reproducible synthesis and characterization of nanomaterials, including the difficulties of maintaining desired materials properties during handling and processing due to their dynamic nature. It is equally valuable for researchers to understand how characterization approaches (surface and otherwise) can help to minimize synthesis surprises and to determine how (and how quickly) materials and properties change in different environments. Appropriate application of traditional surface sensitive analysis methods (including x-ray photoelectron and Auger electron spectroscopies, scanning probe microscopy, and secondary ion mass spectroscopy) can provide information that helps address several of the analysis needs. In many circumstances, extensions of traditional data analysis can provide considerably more information than normally obtained from the data collected. Less common or evolving methods with surface selectivity (e.g., some variations of nuclear magnetic resonance, sum frequency generation, and low and medium energy ion scattering) can provide information about surfaces or interfaces in working environments (operando or in situ) or information not provided by more traditional methods. Although these methods may require instrumentation or expertise not generally available, they can be particularly useful in addressing specific questions, and examples of their use in nanomaterial research are presented.
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Affiliation(s)
- Donald R Baer
- Pacific Northwest National Laboratory, EMSL, P.O. Box 999, Richland, Washington 99352
| | - Mark H Engelhard
- Pacific Northwest National Laboratory, EMSL, P.O. Box 999, Richland, Washington 99352
| | - Grant E Johnson
- Pacific Northwest National Laboratory, EMSL, P.O. Box 999, Richland, Washington 99352
| | - Julia Laskin
- Pacific Northwest National Laboratory, EMSL, P.O. Box 999, Richland, Washington 99352
| | - Jinfeng Lai
- Pacific Northwest National Laboratory, EMSL, P.O. Box 999, Richland, Washington 99352
| | - Karl Mueller
- Pacific Northwest National Laboratory, EMSL, P.O. Box 999, Richland, Washington 99352
| | - Prabhakaran Munusamy
- Pacific Northwest National Laboratory, EMSL, P.O. Box 999, Richland, Washington 99352
| | | | - Hongfei Wang
- Pacific Northwest National Laboratory, EMSL, P.O. Box 999, Richland, Washington 99352
| | - Nancy Washton
- Pacific Northwest National Laboratory, EMSL, P.O. Box 999, Richland, Washington 99352
| | - Alison Elder
- Department of Environmental Medicine, University of Rochester, Rochester, New York
| | - Brittany L Baisch
- Department of Environmental Medicine, University of Rochester, Rochester, New York
| | - Ajay Karakoti
- Battelle Science and Technology India, Pune, Maharashtra, India
| | | | - Daewon Moon
- Daegu Gyeongbuk Institute of Science and Technology, Daeju, Korea
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Reducing Staphylococcus aureus biofilm formation on stainless steel 316L using functionalized self-assembled monolayers. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:2059-69. [PMID: 23498233 DOI: 10.1016/j.msec.2013.01.023] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Revised: 12/21/2012] [Accepted: 01/13/2013] [Indexed: 11/20/2022]
Abstract
Stainless steel 316L (SS316L) is a common material used in orthopedic implants. Bacterial colonization of the surface and subsequent biofilm development can lead to refractory infection of the implant. Since the greatest risk of infection occurs perioperatively, strategies that reduce bacterial adhesion during this time are important. As a strategy to limit bacterial adhesion and biofilm formation on SS316L, self-assembled monolayers (SAMs) were used to modify the SS316L surface. SAMs with long alkyl chains terminated with hydrophobic (-CH3) or hydrophilic (oligoethylene glycol) tail groups were used to form coatings and in an orthogonal approach, SAMs were used to immobilize gentamicin or vancomycin on SS316L for the first time to form an "active" antimicrobial coating to inhibit early biofilm development. Modified SS316L surfaces were characterized using surface infrared spectroscopy, contact angles, MALDI-TOF mass spectrometry and atomic force microscopy. The ability of SAM-modified SS316L to retard biofilm development by Staphylococcus aureus was functionally tested using confocal scanning laser microscopy with COMSTAT image analysis, scanning electron microscopy and colony forming unit analysis. Neither hydrophobic nor hydrophilic SAMs reduced biofilm development. However, gentamicin-linked and vancomycin-linked SAMs significantly reduced S. aureus biofilm formation for up to 24 and 48 h, respectively.
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Witter R, Roming M, Feldmann C, Ulrich AS. Multilayered core–shell structure of polyol-stabilized calcium fluoride nanoparticles characterized by NMR. J Colloid Interface Sci 2013; 390:250-7. [DOI: 10.1016/j.jcis.2012.09.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Revised: 08/07/2012] [Accepted: 09/03/2012] [Indexed: 11/30/2022]
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Abstract
The formation of methyl-terminated carboxylic acid self-assembled monolayers (SAMs) with even numbers of carbons, from eighteen to thirty, was investigated on the oxide surface of Ti-6Al-4V and component metal oxides. Modified surfaces were characterized using diffuse reflectance infrared Fourier transform spectroscopy (DRIFT), matrix assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) and contact angle analysis. Infrared spectroscopy indicated that using aerosol spray deposition techniques, stable, all-trans SAMs of octacosanoic (28 carbons) and triacontanoic (30 carbons) acids were formed on the alloy. Films were similarly formed on titanium and aluminum oxide. The surface of vanadium oxide exhibited limited reactivity. MALDI-TOF MS confirmed that formed films were monolayers, without multilayers or aggregates present. Water contact angles are indicative of the presence of hydrophobic methyl groups at the interface. This stable carboxylic acid SAM formation could be a useful alternative to phosphonic acid SAMs for corrosion and other applications.
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Feichtenschlager B, Pabisch S, Peterlik H, Kickelbick G. Nanoparticle assemblies as probes for self-assembled monolayer characterization: correlation between surface functionalization and agglomeration behavior. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:741-750. [PMID: 22085020 DOI: 10.1021/la2023067] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The ordering of dodecyl chains has been investigated in mixed monolayers of phosphonic acid capping agents on the surface of hydrothermally prepared zirconia nanocrystals. Methyl-, phenyl-, pyryl-, and tert-butylphosphonic acids have been used to investigate series with different mixing ratios with dodecylphosphonic acid as the cocapping agent for the mixed monolayer formation. Fourier transform infrared (FTIR) studies revealed that an increasing amount (different for each type) of coadsorbed capping agent reduces the ordering of the dodecyl chains significantly. Small-angle X-ray scattering (SAXS) verified that with increasing amount of cocapping agent the agglomeration of the particles decreases. The strong correlation of the agglomeration behavior with the ordering of the surface-bound alkyl chains leads to the conclusion that interparticle bilayers, formed via long alkyl chain packing, are responsible and can be controlled on a molecular level by coadsorbing various molecules. On the basis of this correlation, nanoparticles can be used as probes for self-assembled monolayer investigation by an indirect structural method (SAXS) and correlated with the routine spectroscopical method for the chemical analysis of surface groups (FTIR).
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Affiliation(s)
- Bernhard Feichtenschlager
- Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9/165, 1060 Vienna, Austria
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Sun H, Xu J, Fu G, Mao X, Zhang L, Chen Y, Zhou Y, Lu T, Tang Y. Preparation of highly dispersed palladium–phosphorus nanoparticles and its electrocatalytic performance for formic acid electrooxidation. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2011.10.092] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Ross RD, Roeder RK. Binding affinity of surface functionalized gold nanoparticles to hydroxyapatite. J Biomed Mater Res A 2011; 99:58-66. [PMID: 21793197 DOI: 10.1002/jbm.a.33165] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2010] [Revised: 04/29/2011] [Accepted: 05/11/2011] [Indexed: 11/10/2022]
Abstract
Gold nanoparticles (Au NPs) have been investigated for a number of biomedical applications, including drug and gene delivery vehicles, thermal ablation therapy, diagnostic sensors, and imaging contrast agents. Surface functionalization with molecular groups exhibiting calcium affinity can enable targeted delivery of Au NPs to calcified tissue, including damaged bone tissue. Therefore, the objective of this study was to investigate the binding affinity of functionalized Au NPs for targeted delivery to bone mineral, using hydroxyapatite (HA) crystals as a synthetic analog in vitro. Au NPs were synthesized to a mean particle size of 10-15 nm and surface functionalized with either L-glutamic acid, 2-aminoethylphosphonic acid, or alendronate, which exhibit a primary amine for binding gold opposite carboxylate, phosphonate, or bisphosphonate groups, respectively, for targeting calcium. Bisphosphonate functionalized Au NPs exhibited the most rapid binding kinetics and greatest binding affinity to HA, followed by glutamic acid and phosphonic acid. All functional groups reached complete binding after 24 h. Equilibrium binding constants in de-ionized water, determined by nonlinear regression of Langmuir isotherms, were 3.40, 0.69, and 0.25 mg/L for bisphosphonate, carboxylate, and phosphonate functionalized Au NPs, respectively. Functionalized Au NPs exhibited lower overall binding in fetal bovine serum compared to de-ionized water, but relative differences between functional groups were similar.
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Affiliation(s)
- Ryan D Ross
- Department of Aerospace and Mechanical Engineering, Bioengineering Graduate Program, University of Notre Dame, Notre Dame, Indiana 46556, USA
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Kruszewski KM, Gawalt ES. Perfluorocarbon thin films and polymer brushes on stainless steel 316 L for the control of interfacial properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:8120-5. [PMID: 21631123 PMCID: PMC3126892 DOI: 10.1021/la200792t] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Perfluorocarbon thin films and polymer brushes were formed on stainless steel 316 L (SS316L) to control the surface properties of the metal oxide. Substrates modified with the films were characterized using diffuse reflectance infrared Fourier transform spectroscopy (DRIFT), contact angle analysis, atomic force microscopy (AFM), and cyclic voltammetry (CV). Perfluorooctadecanoic acid (PFOA) was used to form thin films by self-assembly on the surface of SS316L. Polypentafluorostyrene (PFS) polymer brushes were formed by surface-initiated polymerization using SAMs of 16-phosphonohexadecanoic acid (COOH-PA) as the base. PFOA and PFS were effective in significantly reducing the surface energy and thus the interfacial wetting properties of SS316L. The SS316L control exhibited a surface energy of 38 mN/m compared to PFOA and PFS modifications, which had surface energies of 22 and 24 mN/m, respectively. PFOA thin films were more effective in reducing the surface energy of the SS316L compared to PFS polymer brushes. This is attributed to the ordered PFOA film presenting aligned CF(3) terminal groups. However, PFS polymer brushes were more effective in providing corrosion protection. These low-energy surfaces could be used to provide a hydrophobic barrier that inhibits the corrosion of the SS316L metal oxide surface.
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Affiliation(s)
- Kristen M Kruszewski
- Department of Chemistry and Biochemistry, Duquesne University, 600 Forbes Avenue, Pittsburgh, Pennsylvania 15282, USA
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Preparation of silica-based nanoparticle having surface-bound octanoyl-aminopropyl moieties and its applications for the capillary electrochromatography separation of charged and neutral compounds. Electrophoresis 2011; 32:1357-63. [DOI: 10.1002/elps.201000527] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Liu X, Huang H, Jin Q, Ji J. Mixed charged zwitterionic self-assembled monolayers as a facile way to stabilize large gold nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:5242-5251. [PMID: 21476529 DOI: 10.1021/la2002223] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Here we report a facile way of stabilizing large gold nanoparticles (AuNPs) by mixed charged zwitterionic self-assembled monolayers (SAMs). The citrate-capped AuNPs with diameters ranging from 16 nm to even ∼100 nm are well stabilized via a simple place exchange reaction with a 1:1 molar ratio mixture of negatively charged sodium 10-mercaptodecanesulfonic acid (HS-C10-S) and positively charged (10-mercaptodecyl)-trimethyl-ammonium bromide (HS-C10-N4). The 16 nm AuNPs protected by mixed charged zwitterionic SAMs not only show much better stability than the single negatively or positively charged AuNPs, but also exhibit exciting stability as well as those modified by monohydroxy (1-mercaptoundec-11-yl) tetraethylene glycol (HS-C11-EG4). Importantly, 16 nm AuNPs protected by mixed SAMs exhibit good stability in cell culture medium with 10% FBS and strong protein resistance, especially with excellent resistance against plasma adsorption. Moreover, the mixed charged zwitterionic SAMs are also able to well-stabilize larger AuNPs with a diameter of 50 nm, and to help remarkably improve their stability in saline solution compared with HS-C11-EG4 protected ones. When it comes to AuNPs with a diameter of 100 nm, the mixed charged zwitterionic SAM protected nanoparticles retain a smaller hydrodynamic diameter and even better long-term stability than those modified by mercaptopolyethylene glycol (M(w) = 2000, HS-PEG2000). The above results demonstrated that the mixed charged zwitterionic SAMs are able to have a similar effect on stabilizing the large gold nanoparticles just like the single-component zwitterionic SAMs. Concerning its ease of preparation, versatility, and excellent properties, the strategy based on the mixed charged zwitterionic SAM protection might provide a promising method to surface tailoring of nanoparticles for biomedical application.
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Affiliation(s)
- Xiangsheng Liu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
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Liang Y, Zhu M, Ma J, Tang Y, Chen Y, Lu T. Highly dispersed carbon-supported Pd nanoparticles catalyst synthesized by novel precipitation–reduction method for formic acid electrooxidation. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.03.019] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Minehara H, Naka K, Tanaka K, Narita A, Chujo Y. Arsonic acid-presenting superparamagnetic iron oxide for pH-responsive aggregation under slightly acidic conditions. Bioorg Med Chem 2011; 19:2282-6. [DOI: 10.1016/j.bmc.2011.02.027] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2011] [Revised: 02/12/2011] [Accepted: 02/15/2011] [Indexed: 11/25/2022]
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Feichtenschlager B, Lomoschitz CJ, Kickelbick G. Tuning the self-assembled monolayer formation on nanoparticle surfaces with different curvatures: investigations on spherical silica particles and plane-crystal-shaped zirconia particles. J Colloid Interface Sci 2011; 360:15-25. [PMID: 21549385 PMCID: PMC3115058 DOI: 10.1016/j.jcis.2011.03.035] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2010] [Revised: 02/04/2011] [Accepted: 03/09/2011] [Indexed: 11/15/2022]
Abstract
The ordering of dodecyl-chain self-assembled monolayers (SAM) on different nanoscopic surfaces was investigated by FT-IR studies. As model systems plane-crystal-shaped ZrO(2) nanoparticles and spherical SiO(2) nanoparticles were examined. The type of capping agent was chosen dependent on the substrate, therefore dodecylphosphonic acid and octadecylphosphonic acid were used for ZrO(2) and dodecyltrimethoxysilane for SiO(2) samples. The plane ZrO(2) nanocrystals yielded more ordered alkyl-chain structures whereas spherical SiO(2) nanoparticles showed significantly lower alkyl-chain ordering. Submicron-sized silica spheres revealed a significantly higher alkyl chain ordering, comparable to an analogously prepared SAM on a non-curved plane oxidized Si-wafer. In the case of ZrO(2) nanocrystals an intense alkyl-chain alignment could be disturbed by decreasing the grafting density from the maximum of 2.1 molecules/nm(2) through the variation of coupling agent concentration to lower values. Furthermore, the co-adsorption of a different coupling agent, such as phenylphosphonic acid for ZrO(2) and phenyltrimethoxysilane for SiO(2), resulted in a significantly lower alkyl-chain ordering for ZrO(2) plane crystals and for large SiO(2) spherical particles at high grafting density. An increasing amount of order-disturbing molecules leads to a gradual decrease in alkyl-chain alignment on the surface of the inorganic nanoparticles. In the case of the ZrO(2) nanoparticle system it is shown via dynamic light scattering (DLS) that the mixed monolayer formation on the particle surface impacts the dispersion quality in organic solvents such as n-hexane.
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Zhang F, Zhou Y, Chen Y, Shi Z, Tang Y, Lu T. Facile controlled preparation of phosphonic acid-functionalized gold nanoparticles. J Colloid Interface Sci 2010; 351:421-6. [DOI: 10.1016/j.jcis.2010.07.063] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2010] [Revised: 07/26/2010] [Accepted: 07/28/2010] [Indexed: 01/30/2023]
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Raman A, Quiñones R, Barriger L, Eastman R, Parsi A, Gawalt ES. Understanding organic film behavior on alloy and metal oxides. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:1747-54. [PMID: 20039608 PMCID: PMC2818877 DOI: 10.1021/la904120s] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Native oxide surfaces of stainless steel 316L and Nitinol alloys and their constituent metal oxides, namely nickel, chromium, molybdenum, manganese, iron, and titanium, were modified with long chain organic acids to better understand organic film formation. The adhesion and stability of films of octadecylphosphonic acid, octadecylhydroxamic acid, octadecylcarboxylic acid, and octadecylsulfonic acid on these substrates were examined in this study. The films formed on these surfaces were analyzed by diffuse reflectance infrared Fourier transform spectroscopy, contact angle goniometry, atomic force microscopy, and matrix-assisted laser desorption ionization mass spectrometry. The effect of the acidity of the organic moiety and substrate composition on the film characteristics and stability is discussed. Interestingly, on the alloy surfaces, the presence of less reactive metal sites does not inhibit film formation.
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Analytical strategies for characterizing the surface chemistry of nanoparticles. Anal Bioanal Chem 2009; 396:973-82. [PMID: 19644676 DOI: 10.1007/s00216-009-2996-1] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2009] [Revised: 07/16/2009] [Accepted: 07/17/2009] [Indexed: 10/20/2022]
Abstract
Chemical modifications of nanoparticle (NP) surfaces are likely to regulate their activities, remove their toxic effects, and enable them to perform desired functions. It is urgent to develop analytical strategies for acquiring structural and quantitative information about small molecules linked to the surface of NP. Recent progress in characterizing the surface chemistry of NPs using nuclear magnetic resonance (NMR) spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, liquid chromatography-mass spectroscopy (LC-MS), X-ray photoelectron spectroscopy (XPS), and combustion elemental analysis are reviewed.
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von Holt B, Kudera S, Weiss A, Schrader TE, Manna L, Parak WJ, Braun M. Ligand exchange of CdSe nanocrystals probed by optical spectroscopy in the visible and mid-IR. ACTA ACUST UNITED AC 2008. [DOI: 10.1039/b720009a] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Quiñones R, Gawalt ES. Study of the formation of self-assembled monolayers on nitinol. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:10123-30. [PMID: 17725369 DOI: 10.1021/la701110p] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Shape memory alloys such as nitinol (NiTi) have gained interest due to their unique and unusual properties of thermal shape memory, superelasticity, and good damping properties. Nitinol is mainly used for medical purposes. In order to control the surface properties of this alloy, self-assembled monolayers (SAMs) were formed and characterized on the native oxide surface of nitinol for the first time. Factors which affect the formation of SAMs, such as head group functionality, chain length, and tail group functionality, were varied and analyzed. Functionalized alkyl phosphonic acid molecules (OH, COOH, and CH3) formed monolayers on the nitinol surface using a simple deposition method resulting in the molecules being ordered and strongly bound to the surface. Diffuse reflectance infrared spectroscopy (DRIFT), contact angle goniometry, atomic force microscopy (AFM), and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) were used to characterize the surfaces before and after organic modification.
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Affiliation(s)
- Rosalynn Quiñones
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, Pennsylvania 15282, USA
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