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Kim DY, Kim KS, Yang CM, Kim J. Water Adsorption Behavior on a Highly Dense Single-Walled Carbon Nanotube Film with an Enhanced Interstitial Space. ACS OMEGA 2021; 6:7015-7022. [PMID: 33748615 PMCID: PMC7970577 DOI: 10.1021/acsomega.0c06302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 02/18/2021] [Indexed: 06/12/2023]
Abstract
In this study, we describe the adsorption behavior of water (H2O) in the interstitial space of single-walled carbon nanotubes (SWCNTs). A highly dense SWCNT (HD-SWCNT) film with a remarkably enhanced interstitial space was fabricated through mild HNO3/H2SO4 treatment. The N2, CO2, and H2 adsorption isotherm results indicated remarkably developed micropore volumes (from 0.10 to 0.40 mL g-1) and narrower micropore widths (from 1.5 to 0.9 nm) following mild HNO3/H2SO4 treatment, suggesting that the interstitial space was increased from the initial densely-packed network assembly structure of the SWCNTs. The H2O adsorption isotherm of the HD-SWCNT film at 303 K showed an increase in H2O adsorption (i.e., by ∼170%), which increased rapidly from the critical value of relative pressure (i.e., 0.3). Despite the remarkably enhanced adsorption capacity of H2O, the rates of H2O adsorption and desorption in the interstitial space did not change. This result shows an adsorption behavior different from that of the fast transport of H2O molecules in the internal space of the SWCNTs. In addition, the adsorption capacities of N2, CO2, H2, and H2O molecules in the interstitial space of the HD-SWCNT film showed a linear relationship with the kinetic diameter, indicating an adsorption behavior that is highly dependent on the kinetic diameter.
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Affiliation(s)
- Dong Young Kim
- Department
of Applied Chemistry, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Keun Soo Kim
- Department
of Physics and Astronomy, Sejong University, Seoul 05006, Republic of Korea
| | - Cheol-Min Yang
- Institute
of Advanced Composite Materials, Korea Institute
of Science and Technology (KIST), 92 Chudong-ro, Wanju-gun, Jeonbuk 55324, Korea
| | - Jungpil Kim
- Carbon
Materials Application Research Group, Korea
Institute of Industrial Technology (KITECH), 222 Palbok-ro,
Deokjin-gu, Jeonju 54853, Korea
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2
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Itoi H, Muramatsu H, Inagaki M. Constraint spaces in carbon materials. RSC Adv 2019; 9:22823-22840. [PMID: 35514496 PMCID: PMC9067293 DOI: 10.1039/c9ra03890f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Accepted: 07/18/2019] [Indexed: 11/21/2022] Open
Abstract
Nano-sized pores in carbon materials are recently known to give certain constraints to the encapsulated materials by keeping them inside, accompanied with some changes in their structure, morphology, stability, etc. Consequently, nano-sized pores endow the constrained materials with improved performances in comparison with those prepared by conventional processes. These pores may be called "constraint spaces" in carbon materials. Here, we review the experimental results related to these constraint spaces by classifying as nanochannels in carbon nanotubes, nanopores and nanochannels in various porous carbons, and the spaces created by carbon coating.
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Affiliation(s)
- Hiroyuki Itoi
- Department of Applied Chemistry, Aichi Institute of Technology Yachigusa 1247, Yakusa-cho Toyota 470-0392 Japan
| | - Hiroyuki Muramatsu
- Faculty of Engineering, Shinshu University 4-17-1 Wakasato Nagano 380-8553 Japan
| | - Michio Inagaki
- Professor Emeritus of Hokkaido University 228-7399 Nakagawa, Hosoe-cho, Kita-ku Hamamatsu 431-1304 Japan
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Ganji MD, Mirzaei S, Dalirandeh Z. Molecular origin of drug release by water boiling inside carbon nanotubes from reactive molecular dynamics simulation and DFT perspectives. Sci Rep 2017; 7:4669. [PMID: 28680131 PMCID: PMC5498575 DOI: 10.1038/s41598-017-04981-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 05/22/2017] [Indexed: 11/25/2022] Open
Abstract
Owing to their nanosized hollow cylindrical structure, CNTs hold the promise to be utilized as desired materials for encapsulating molecules which demonstrate wide inferences in drug delivery. Here we evaluate the possibility of drug release from the CNTs with various types and edge chemistry by reactive MD simulation to explain the scientifically reliable relations for proposed process. It was shown that heating of CNTs (up to 750 K) cannot be used for release of incorporated drug (phenylalanine) into water and even carbonated water solvent with very low boiling temperature. This is due to the strong physisorption (π-stacking interaction) between the aromatic of encapsulated drug and CNT sidewall which causes the drug to bind the nanotube sidewall. We have further investigated the interaction nature and release mechanism of water and drug confined/released within/from the CNTs by DFT calculations and the results confirmed our MD simulation findings. The accuracy of DFT method was also validated against the experimental and theoretical values at MP2/CCSD level. Therefore, we find that boiling of water/carbonated water confined within the CNTs could not be a suitable technique for efficient drug release. Our atomistic simulations provide a well-grounded understanding for the release of drug molecules confined within CNTs.
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Affiliation(s)
- M Darvish Ganji
- Department of Nanochemistry, Faculty of Pharmaceutical Chemistry, Pharmaceutical Sciences Branch, Islamic Azad University (IAUPS), Tehran, Iran.
| | - Sh Mirzaei
- Young Researchers & Elite Club, Pharmaceutical Sciences Branch, Islamic Azad University, Tehran, Iran
| | - Z Dalirandeh
- Young Researchers and Elite Club, Central Tehran Branch, Islamic Azad University, Tehran, Iran
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Mehrjouei E, Akbarzadeh H, Shamkhali AN, Abbaspour M, Salemi S, Abdi P. Delivery of Cisplatin Anti-Cancer Drug from Carbon, Boron Nitride, and Silicon Carbide Nanotubes Forced by Ag-Nanowire: A Comprehensive Molecular Dynamics Study. Mol Pharm 2017; 14:2273-2284. [PMID: 28595387 DOI: 10.1021/acs.molpharmaceut.7b00106] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
In this work, liberation of cisplatin molecules from interior of a nanotube due to entrance of an Ag-nanowire inside it was simulated by classical molecular dynamics method. The aim of this simulation was investigation on the effects of diameter, chirality, and composition of the nanotube, as well as the influence of temperature on this process. For this purpose, single walled carbon, boron nitride, and silicon carbide nanotube were considered. In order for a more concise comparison of the results, a new parameter namely efficiency of drug release, was introduced. The results demonstrated that the efficiency of drug release is sensitive to its adsorption on outer surface of the nanotube. Moreover, this efficiency is also sensitive to the nanotube composition and its diameter. For the effect of nanotube composition, the results indicated that silicon carbide nanotube has the least efficiency for drug release, due to its strong drug-nanotube. Also, the most important acting forces on drug delivery are van der Waals interactions. Finally, the kinetic of drug release is fast and is not related to the structural parameters of the nanotube and temperature, significantly.
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Affiliation(s)
- Esmat Mehrjouei
- Department of Chemistry, Faculty of Basic Sciences, Hakim Sabzevari University , 96179-76487 Sabzevar, Iran
| | - Hamed Akbarzadeh
- Department of Chemistry, Faculty of Basic Sciences, Hakim Sabzevari University , 96179-76487 Sabzevar, Iran
| | - Amir Nasser Shamkhali
- Department of Chemistry, Faculty of Science, University of Mohaghegh Ardabili , 56199-11367 Ardabil, Iran
| | - Mohsen Abbaspour
- Department of Chemistry, Faculty of Basic Sciences, Hakim Sabzevari University , 96179-76487 Sabzevar, Iran
| | - Sirous Salemi
- Department of Chemistry, Faculty of Basic Sciences, Hakim Sabzevari University , 96179-76487 Sabzevar, Iran
| | - Pooya Abdi
- Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran , 14395-1561 Tehran, Iran
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Ohkubo T, Kusudo T, Kuroda Y. Asymmetric hydration structure around calcium ion restricted in micropores fabricated in activated carbons. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:464003. [PMID: 27624154 DOI: 10.1088/0953-8984/28/46/464003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The adsorbed phase and hydration structure of an aqueous solution of Ca(NO3)2 restricted in micropores fabricated in activated carbons (ACs) having different average pore widths (0.63 and 1.1 nm) were investigated with the analysis of adsorption isotherms and x-ray absorption fine structure (XAFS) spectra on Ca K-edge. The adsorbed density of Ca(2+) per unit micropore volume in the narrower pore was higher than in the wider pore, while the adsorbed amount per unit mass of carbon with the narrower pore was half of the amount of ACs with the larger pore. On the other hand, variations in the bands assigned to double-electron (KM I) and 1s → 3d excitations in XAFS spectra demonstrate the formation of a distorted hydration cluster around Ca(2+) in the micropore, although the structural parameters of hydrated Ca(2+) in the micropores were almost consistent with the bulk aqueous solution, as revealed by the analysis of extended XAFS (EXAFS) spectra. In contrast to the hydration structure of monovalent ions such as Rb(+), which generally presents a dehydrated structure in smaller than 1 nm micropores in ACs, the present study clearly explains that the non-spherically-symmetric structure of hydrated Ca(2+) restricted in carbon micropores whose sizes are around 1 nm is experimentally revealed where any dehydration phenomena from the first hydration shell around Ca(2+) could not be observed.
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Affiliation(s)
- Takahiro Ohkubo
- Department of Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
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Ohba T, Ideta K, Hata K, Yoon SH, Miyawaki J, Hata K. Fast Water Relaxation through One-Dimensional Channels by Rapid Energy Transfer. Chemphyschem 2016; 17:3409-3415. [PMID: 27647486 DOI: 10.1002/cphc.201600895] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Indexed: 11/07/2022]
Abstract
Water in carbon nanotubes is surrounded by hydrophobic carbon surfaces and shows anomalous structural and fast transport properties. However, the dynamics of water in hydrophobic nanospaces is only phenomenologically understood. In this study, water dynamics in hydrophobic carbon nanotubes is evaluated based on water relaxation using nuclear magnetic resonance spectroscopy and molecular dynamics simulations. Extremely fast relaxation (0.001 s) of water confined in carbon nanotubes of 1 nm in diameter on average is observed; the relaxation times of water confined in carbon nanotubes with an average diameter of 2 nm (0.40 s) is similar to that of bulk water (0.44 s). The extremely fast relaxation time of water confined in carbon nanotubes with an average diameter of 1 nm is a result of frequent energy transfer between water and carbon surfaces. Water relaxation in carbon nanotubes of average diameter 2 nm is slow because of the limited number of collisions between water molecules. The dynamics of interfacial water can therefore be controlled by varying the size of the hydrophobic nanospace.
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Affiliation(s)
- Tomonori Ohba
- Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba, 263-8522, Japan
| | - Keiko Ideta
- Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka, 816-8580, Japan
| | - Koichiro Hata
- Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka, 816-8580, Japan
| | - Seong-Ho Yoon
- Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka, 816-8580, Japan
| | - Jin Miyawaki
- Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka, 816-8580, Japan
| | - Kenji Hata
- Nanotube Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi Tsukuba, Ibaraki, 305-8565, Japan
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Nishi M, Ohkubo T, Urita K, Moriguchi I, Kuroda Y. Experimental Information on the Adsorbed Phase of Water Formed in the Inner Pore of Single-Walled Carbon Nanotube Itself. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:1058-64. [PMID: 26756541 DOI: 10.1021/acs.langmuir.5b04222] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Thus far, nobody has successfully obtained the accurate information on the properties of the adsorbed phases of gases or vapors formed inside a cylindrical micropore of single-walled carbon nanotube (SWCNT) itself based on the experimental procedure. In this work, we succeeded in analyzing experimentally the properties of adsorbed nitrogen and water confined in the inner pore of SWCNT itself by opening the pore composed of close-ended SWCNT without any changes in the surface state and also by applying the unique method for characterization; both the amounts, as well as properties, of surface functional groups and the bundle structure are the same even after the treatments for introducing an open-ended structure to a close-ended one. As a result, the average pore sizes, as well as characteristic adsorption behavior, on the two types of sample were available from the analysis of respective difference adsorption isotherms of nitrogen measured at 77 K between the adsorbed amounts on the open-ended SWCNT and that on the close-ended one. The evaluated pore sizes well coincide with the results estimated by Raman data. These results strongly support that we could analyze the adsorbed phases formed only in the inner pore of SWCNTs by applying the present method. Furthermore, we could analyze the adsorbed phase of water formed inside the cylindrical micropore of SWCNTs, showing the difference in the densities of adsorbed water depending on the pore sizes from the value of bulk water; the densities of the adsorbed water were evaluated to be 0.62 and 0.71 g mL(-1) for SWCNTs having average pore sizes of 1.3 and 1.7 nm, respectively, which were in harmony with those obtained by the theoretical calculations reported by other researchers. The proposed analysis method makes it possible to recognize the focused states of the adsorbed water formed inside the cylindrical micropore of SWCNT more precisely and correctly. The method proposed will shed light on the discussion related to the detailed nature of various adsorbed gases into SWCNT, to the detailed role of adsorbed species formed inside pore in various phenomena, and to the designing the useful materials based on the gained knowledge.
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Affiliation(s)
- Masayasu Nishi
- Department of Chemistry, Graduate School of Natural Science and Technology, Okayama University , 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan
| | - Takahiro Ohkubo
- Department of Chemistry, Graduate School of Natural Science and Technology, Okayama University , 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan
| | - Koki Urita
- Division of Chemistry and Materials Science, Graduate School of Engineering, Nagasaki University , 1-14 Bunkyomachi, Nagasaki 852-8521, Japan
| | - Isamu Moriguchi
- Division of Chemistry and Materials Science, Graduate School of Engineering, Nagasaki University , 1-14 Bunkyomachi, Nagasaki 852-8521, Japan
| | - Yasushige Kuroda
- Department of Chemistry, Graduate School of Natural Science and Technology, Okayama University , 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan
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Ohba T, Yamamoto S, Kodaira T, Hata K. Changing water affinity from hydrophobic to hydrophilic in hydrophobic channels. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:1058-1063. [PMID: 25586050 DOI: 10.1021/la504522x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The behavior of water at hydrophobic interfaces can play a significant role in determining chemical reaction outcomes and physical properties. Carbon nanotubes and aluminophosphate materials have one-dimensional hydrophobic channels, which are entirely surrounded by hydrophobic interfaces. Unique water behavior was observed in such hydrophobic channels. In this article, changes in the water affinity in one-dimensional hydrophobic channels were assessed using water vapor adsorption isotherms at 303 K and grand canonical Monte Carlo simulations. Hydrophobic behavior of water adsorbed in channels wider than 3 nm was observed for both adsorption and desorption processes, owing to the hydrophobic environment. However, water showed hydrophilic properties in both adsorption and desorption processes in channels narrower than 1 nm. In intermediate-sized channels, the hydrophobic properties of water during the adsorption process were seen to transition to hydrophilic behavior during the desorption process. Hydrophilic properties in the narrow channels for both adsorption and desorption processes are a result of the relatively strong water-channel interactions (10-15 kJ mol(-1)). In the 2-3 nm channels, the water-channel interaction energy of 4-5 kJ mol(-1) was comparable to the thermal translational energy. The cohesive water interaction was approximately 35 kJ mol(-1), which was larger than the others. Thus, the water affinity change in the 2-3 nm channels for the adsorption and desorption processes was attributed to weak water-channel interactions and strong cohesive interactions. These results are inherently important to control the properties of water in hydrophobic environments.
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Affiliation(s)
- Tomonori Ohba
- Graduate School of Science, Chiba University , 1-33 Yayoi, Inage, Chiba 263-8522, Japan
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Ohba T. Size-Dependent Water Structures in Carbon Nanotubes. Angew Chem Int Ed Engl 2014; 53:8032-6. [DOI: 10.1002/anie.201403839] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Indexed: 11/05/2022]
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Ohba T, Chaban VV. A Highly Viscous Imidazolium Ionic Liquid inside Carbon Nanotubes. J Phys Chem B 2014; 118:6234-40. [DOI: 10.1021/jp502798e] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Tomonori Ohba
- Graduate
School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan
| | - Vitaly V. Chaban
- MEMPHYS
- Center for Biomembrane Physics, Syddansk Universitet, Odense M, 5230, Denmark
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Ohba T. Anomalously Enhanced Hydration of Aqueous Electrolyte Solution in Hydrophobic Carbon Nanotubes to Maintain Stability. Chemphyschem 2014; 15:415-9. [DOI: 10.1002/cphc.201300957] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Indexed: 11/08/2022]
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