1
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Zhu Z, Zhu J, Chang C, Qi C, Zhu Z, Zhao H, Zhang D, Zeng XC, Wang C. Tunable Surface Wettability via Terahertz Electrowave Controlled Vicinal Subnanoscale Water Layer. NANO LETTERS 2024; 24:3243-3248. [PMID: 38427592 DOI: 10.1021/acs.nanolett.4c00248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/03/2024]
Abstract
Achieving timely, reversible, and long-range remote tunability over surface wettability is highly demanded across diverse fields, including nanofluidic systems, drug delivery, and heterogeneous catalysis. Herein, using molecular dynamic simulations, we show, for the first time, a theoretical design of electrowetting to achieve remotely controllable surface wettability via using a terahertz wave. The key idea driving the design is the unique terahertz collective vibration identified in the vicinal subnanoscale water layer, which is absent in bulk water, enabling efficient energy transfer from the terahertz wave to the rotational motion of the vicinal subnanoscale water layer. Consequently, a frequency-specific alternating terahertz electric field near the critical strength can significantly affect the local hydrogen-bonding network of the contact water layer on the solid surface, thereby achieving tunable surface wettability.
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Affiliation(s)
- Zhi Zhu
- College of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Junquan Zhu
- College of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Chao Chang
- Innovation Laboratory of Terahertz Biophysics, National Innovation Institute of Defense Technology, Beijing 100071, China
- School of Physics, Peking University, Beijing 100871, China
| | - Chonghai Qi
- School of Physical and Intelligent Engineering, Jining University, Qufu 273155, China
| | - Zhongjie Zhu
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - Hongwei Zhao
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - Dengsong Zhang
- International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Xiao Cheng Zeng
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, 999077, Hong Kong
| | - Chunlei Wang
- International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
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2
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Mao D, Wang X, Wu Y, Gu Z, Wang C, Tu Y. Unexpected hydrophobicity on self-assembled monolayers terminated with two hydrophilic hydroxyl groups. NANOSCALE 2021; 13:19604-19609. [PMID: 34812817 DOI: 10.1039/d1nr05048f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Current major approaches to access surface hydrophobicity include directly introducing hydrophobic nonpolar groups/molecules onto the surface or elaborately fabricating surface roughness. Here, for the first time, molecular dynamics simulations show an unexpected hydrophobicity with a contact angle of 82° on a flexible self-assembled monolayer terminated only with two hydrophilic OH groups ((OH)2-SAM). This hydrophobicity, verified by a water slip phenomenon characterizing the friction on the (OH)2-SAM surface, is attributed to the formation of a hexagonal-ice-like H-bonding structure in the OH matrix of (OH)2-SAM, which sharply reduces the hydrogen bonds between the surface and the water molecules above. The unique simple interface presented here offers a significant molecular-level platform for examining the bio-interfacial interactions ranging from biomolecule binding to cell adhesion.
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Affiliation(s)
- Dangxin Mao
- College of Physics Science and Technology, Yangzhou University, Jiangsu 225009, China.
| | - Xian Wang
- College of Physics Science and Technology, Yangzhou University, Jiangsu 225009, China.
| | - Yuanyan Wu
- College of Physics Science and Technology, Yangzhou University, Jiangsu 225009, China.
| | - Zonglin Gu
- College of Physics Science and Technology, Yangzhou University, Jiangsu 225009, China.
| | - Chunlei Wang
- Zhangjiang Lab, Interdisplinary Research Center, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China.
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Yusong Tu
- College of Physics Science and Technology, Yangzhou University, Jiangsu 225009, China.
- Key Laboratory of Polar Materials and Devices Ministry of Education, School of Physics and Electrical Science, East China Normal University, Shanghai 200241, China
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3
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Zhang J, Tan J, Pei R, Ye S, Luo Y. Ordered Water Layer on the Macroscopically Hydrophobic Fluorinated Polymer Surface and Its Ultrafast Vibrational Dynamics. J Am Chem Soc 2021; 143:13074-13081. [PMID: 34384210 DOI: 10.1021/jacs.1c03581] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hydrophobic-like water monolayers have been predicted at the metal and some polar surfaces by theoretical simulations. However, direct experimental evidence for the presence of this water layer at surfaces, particularly at biomolecule and polymer surfaces, is yet to be validated at room temperature. Here we observe experimentally that an ordered molecular water layer is present at the hydrophobic fluorinated polymer such as polytetrafluoroethylene (PTFE) surface by using sum frequency generation vibrational spectroscopy. The macroscopic hydrophobicity of PTFE surface is actually hydrophilic at the molecular level. The macroscopically hydrophobic character of PTFE is indeed resulting from the hydrophobicity of the ordered two-dimension (2D) water layer, in which cyclic water tetramer structure is found. The water layer at humidity of ≤40% has a vibrational relaxation time of 550 ± 60 fs. The vibrational relaxation time in the frequency range of 3200-3400 cm-1 shows remarkable difference from the interfacial water at the air/H2O interface and the lipid/H2O interface. No discernible frequency dependence of the vibrational relaxation time is observed, indicating the homogeneous dynamics of OH groups in the water layer. These insights into the water layer at the macroscopically hydrophobic surface may contribute to a better understanding of the hydrophobic interaction and interfacial water dynamics.
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Affiliation(s)
- Jiahui Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Junjun Tan
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Ruoqi Pei
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Shuji Ye
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Yi Luo
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
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4
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Wang D, Tian Y, Jiang L. Abnormal Properties of Low-Dimensional Confined Water. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2100788. [PMID: 34176214 DOI: 10.1002/smll.202100788] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 03/25/2021] [Indexed: 06/13/2023]
Abstract
Water molecules confined to low-dimensional spaces exhibit unusual properties compared to bulk water. For example, the alternating hydrophilic and hydrophobic nanodomains on flat silicon wafer can induce the abnormal spreading of water (contact angles near 0°) which is caused by the 2D capillary effect. Hence, exploring the physicochemical properties of confined water from the nanoscale is of great value for understanding the challenges in material science and promoting the applications of nanomaterials in the fields of mass transport, nanofluidic designing, and fuel cell. The knowledge framework of confined water can also help to better understand the complex functions of the hydration layer of biomolecules, and even trace the origin of life. In this review, the physical properties, abnormal behaviors, and functions of the confined water are mainly summarized through several common low-dimensional water formats in the fields of solid/air-water interface, nanochannel confinement, and biological hydration layer. These researches indicate that the unusual behaviors of the confined water depend strongly on the confinement size and the interaction between the molecules and confining surface. These diverse properties of confined water open a new door to materials science and may play an important role in the future development of biology.
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Affiliation(s)
- Dianyu Wang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing, 100191, P. R. China
| | - Ye Tian
- Key Laboratory of Bioinspired Smart Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Lei Jiang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing, 100191, P. R. China
- Key Laboratory of Bioinspired Smart Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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5
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Han T, Ma Z, Wang D. Biofouling-Inspired Growth of Superhydrophilic Coating of Polyacrylic Acid on Hydrophobic Surfaces for Excellent Anti-Fouling. ACS Macro Lett 2021; 10:354-358. [PMID: 35549063 DOI: 10.1021/acsmacrolett.0c00860] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this work, we demonstrated effective adsorption of poly(acrylic acid) (PAA) in saline water on various hydrophobic substrates, ranging from polyethylene and polytetrafluoroethylene, to form densely packed monolayers with water contact angle as low as 6.5° in air. This was a result of the synergy of long-range hydrophobic interactions between individual PAA chains and hydrophobic surfaces and short-range hydrogen bonding between neighboring PAA chains, reminiscent of the interaction balance encountered in biofouling. The PAA monolayers adsorbed on hydrophobic surfaces showed the ultrahigh packing density of surface COOH groups of 4.8 nm-2, which contributed to the surface superhydrophilicity and its stability against surface reconstruction during aging even at temperature higher than PAA glass transition. Further, conjugation of the adsorbed PAA monolayers with polyethylene glycol results in excellent antifouling with nearly zero adsorption of proteins.
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Affiliation(s)
- Tianyuan Han
- State Key Lab of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
| | - Zhuoyuan Ma
- State Key Lab of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
| | - Dayang Wang
- State Key Lab of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
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6
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Lin C, Darling GR, Forster M, McBride F, Massey A, Hodgson A. Hydration of a 2D Supramolecular Assembly: Bitartrate on Cu(110). J Am Chem Soc 2020; 142:13814-13822. [PMID: 32692550 PMCID: PMC7458425 DOI: 10.1021/jacs.0c04747] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
![]()
Hydration
layers play a key role in many technical and biological
systems, but our understanding of these structures remains very limited.
Here, we investigate the molecular processes driving hydration of
a chiral metal–organic surface, bitartrate on Cu(110), which
consists of hydrogen-bonded bitartrate rows separated by exposed Cu.
Initially water decorates the metal channels, hydrogen bonding to
the exposed O ligands that bind bitartrate to Cu, but does not wet
the bitartrate rows. At higher temperature, water inserts into the
structure, breaks the existing intermolecular hydrogen bonds, and
changes the adsorption site and footprint. Calculations show this
process is driven by the creation of stable adsorption sites between
the carboxylate ligands, to allow hydration of O–Cu ligands
within the interior of the structure. This work suggests that hydration
of polar metal–adsorbate ligands will be a dominant factor
in many systems during surface hydration or self-assembly from solution.
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Affiliation(s)
- Chenfang Lin
- Surface Science Research Centre and Department of Chemistry, University of Liverpool, Liverpool L69 3BX, United Kingdom
| | - George R Darling
- Surface Science Research Centre and Department of Chemistry, University of Liverpool, Liverpool L69 3BX, United Kingdom
| | - Matthew Forster
- Surface Science Research Centre and Department of Chemistry, University of Liverpool, Liverpool L69 3BX, United Kingdom
| | - Fiona McBride
- Surface Science Research Centre and Department of Chemistry, University of Liverpool, Liverpool L69 3BX, United Kingdom
| | - Alan Massey
- Surface Science Research Centre and Department of Chemistry, University of Liverpool, Liverpool L69 3BX, United Kingdom
| | - Andrew Hodgson
- Surface Science Research Centre and Department of Chemistry, University of Liverpool, Liverpool L69 3BX, United Kingdom
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7
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Wang C, Yang H, Wang X, Qi C, Qu M, Sheng N, Wan R, Tu Y, Shi G. Unexpected large impact of small charges on surface frictions with similar wetting properties. Commun Chem 2020; 3:27. [PMID: 36703380 PMCID: PMC9814279 DOI: 10.1038/s42004-020-0271-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Accepted: 02/04/2020] [Indexed: 01/29/2023] Open
Abstract
Generally, the interface friction on solid surfaces is regarded as consistent with wetting behaviors, characterized by the contact angles. Here using molecular dynamics simulations, we find that even a small charge difference (≤0.36 e) causes a change in the friction coefficient of over an order of magnitude on two-dimensional material and lipid surfaces, despite similar contact angles. This large difference is confirmed by experimentally measuring interfacial friction of graphite and MoS2 contacting on water, using atomic force microscopy. The large variation in the friction coefficient is attributed to the different fluctuations of localized potential energy under inhomogeneous charge distribution. Our results help to understand the dynamics of two-dimensional materials and biomolecules, generally formed by atoms with small charge, including nanomaterials, such as nitrogen-doped graphene, hydrogen-terminated graphene, or MoS2, and molecular transport through cell membranes.
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Affiliation(s)
- Chunlei Wang
- grid.450275.10000 0000 9989 3072Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800 China ,grid.458506.a0000 0004 0497 0637Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210 China
| | - Haijun Yang
- grid.450275.10000 0000 9989 3072Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800 China ,grid.458506.a0000 0004 0497 0637Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210 China
| | - Xian Wang
- grid.268415.cCollege of Physics Science and Technology, Yangzhou University, Jiangsu, 225009 China
| | - Chonghai Qi
- grid.450275.10000 0000 9989 3072Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800 China ,grid.27255.370000 0004 1761 1174School of Physics, Shandong University, Jinan, 250100 China
| | - Mengyang Qu
- grid.450275.10000 0000 9989 3072Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800 China
| | - Nan Sheng
- grid.450275.10000 0000 9989 3072Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800 China ,grid.458506.a0000 0004 0497 0637Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210 China
| | - Rongzheng Wan
- grid.450275.10000 0000 9989 3072Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800 China ,grid.458506.a0000 0004 0497 0637Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210 China
| | - Yusong Tu
- grid.268415.cCollege of Physics Science and Technology, Yangzhou University, Jiangsu, 225009 China
| | - Guosheng Shi
- grid.39436.3b0000 0001 2323 5732Shanghai Applied Radiation Institute and State Key Lab. Advanced Special Steel, Shanghai University, Shanghai, 200444 China
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8
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Shao M, Zhang C, Qi C, Wang C, Wang J, Ye F, Zhou X. Hydrogen polarity of interfacial water regulates heterogeneous ice nucleation. Phys Chem Chem Phys 2019; 22:258-264. [PMID: 31808477 DOI: 10.1039/c9cp04867g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using all-atomic molecular dynamics (MD) simulations, we show that the structure of interfacial water (IW) induced by substrates characterizes the ability of a substrate to nucleate ice. We probe the shape and structure of ice nuclei and the corresponding supercooling temperatures to measure the ability of IW with various hydrogen polarities for ice nucleation, and find that the hydrogen polarization of IW even with the ice-like oxygen lattice increases the contact angle of the ice nucleus on IW, thus lifting the free energy barrier of heterogeneous ice nucleation. The results show that not only the oxygen lattice order but the hydrogen disorder of IW on substrates are required to effectively facilitate the freezing of top water.
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Affiliation(s)
- Mingzhe Shao
- College of Light Industry Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
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9
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Qi C, Lei X, Zhou B, Wang C, Zheng Y. Temperature regulation of the contact angle of water droplets on the solid surfaces. J Chem Phys 2019; 150:234703. [PMID: 31228915 DOI: 10.1063/1.5090529] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
We investigate theoretically the stability of the wetting property, i.e., the contact angle values, as a function of the temperature. We find that the estimated temperature coefficient of the contact angle for the water droplets on an ordered water monolayer on a 100 surface of face-center cubic (FCC) is about one order of magnitude larger than that on a hydrophobic hexagonal surface in the temperature range between 290 K and 350 K, using molecular dynamics simulations. As temperature rises, the number of hydrogen bonds between the ordered water monolayer and the water droplet will increase, which therefore enhances the hydrophilicity of the ordered water monolayer at the FCC model surface. Our work thus provides an easily controllable and reversible way to control the degree of hydrophobicity of various solid surfaces exhibiting a similar wetting property of water droplets on the ordered water monolayer as such particular FCC (100) surfaces.
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Affiliation(s)
- Chonghai Qi
- School of Physics, Shandong University, Jinan 250100, China
| | - Xiaoling Lei
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Bo Zhou
- School of Electronic Engineering, Chengdu Technological University, Chengdu 611730, China
| | - Chunlei Wang
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Yujun Zheng
- School of Physics, Shandong University, Jinan 250100, China
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10
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Soliman AIA, Utsunomiya T, Ichii T, Sugimura H. Vacuum Ultraviolet Treatment of Acid- and Ester-Terminated Self-Assembled Monolayers: Chemical Conversions and Friction Reduction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:3228-3236. [PMID: 29451390 DOI: 10.1021/acs.langmuir.7b04327] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We have prepared COOH- and COOCH3-terminated self-assembled monolayers (SAMs) from undec-10-enoic acid (UDA) and methyl undec-10-enoate (MUDO) molecules on hydrogen-terminated silicon (H-Si) substrates through ultraviolet (UV) irradiation. The as-prepared UDA- and MUDO-SAMs were exposed to 172 nm vacuum-UV (VUV) light in a high vacuum environment (HV, <10-3 Pa) for different periods. The presence of COO components at the surfaces of these SAMs without prior oxidation would simplify the understanding of the origin of the chemical conversions and the changes of surface properties, as the prior oxidation would change the surface properties and generate different oxygenated groups. After the HV-VUV treatment, the abundance of COOH and COOCH3 components of these SAMs decreased without significant dissociation of their C-C backbones. Degradation of these components occurred through dissociating their C-O bonds, resulting in different C═O components. Also, the occurrence of Norrish type pathways resulted in a slight decrease of carbon content and produced CH3 components. We have applied the HV-VUV lithography to control the abundance of COOH and COOCH3 components in well-defined areas and to investigate the friction differences between the irradiated and masked areas. The irradiated areas exhibited lower friction than the masked areas without observing significant height contrasts between these areas. The reduction in friction was attributed to the conversion of the COOH and COOCH3 components to less adhesive components such as C═O and CH3. These experiments suggest the HV-VUV treatments as an approach for low damage dry surface modifications and reductive lithographic techniques at surfaces terminated by acid and ester groups.
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Affiliation(s)
- Ahmed I A Soliman
- Department of Materials Science and Engineering , Kyoto University , Yoshida-Hommachi , Sakyo-ku, Kyoto 606-8501 , Japan
| | - Toru Utsunomiya
- Department of Materials Science and Engineering , Kyoto University , Yoshida-Hommachi , Sakyo-ku, Kyoto 606-8501 , Japan
| | - Takashi Ichii
- Department of Materials Science and Engineering , Kyoto University , Yoshida-Hommachi , Sakyo-ku, Kyoto 606-8501 , Japan
| | - Hiroyuki Sugimura
- Department of Materials Science and Engineering , Kyoto University , Yoshida-Hommachi , Sakyo-ku, Kyoto 606-8501 , Japan
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11
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Liu J, Lai CY, Zhang YY, Chiesa M, Pantelides ST. Water wettability of graphene: interplay between the interfacial water structure and the electronic structure. RSC Adv 2018; 8:16918-16926. [PMID: 35540542 PMCID: PMC9080294 DOI: 10.1039/c8ra03509a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Accepted: 04/28/2018] [Indexed: 12/14/2022] Open
Abstract
Wettability of graphene is characterized from first principles.
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Affiliation(s)
- Jian Liu
- Department of Physics and Astronomy
- Vanderbilt University
- Tennessee 37235
- USA
| | - Chia-Yun Lai
- Laboratory for Energy and Nano-Sciences
- Khalifa University of Science and Technology
- Abu Dhabi
- United Arab Emirates
| | - Yu-Yang Zhang
- Department of Physics and Astronomy
- Vanderbilt University
- Tennessee 37235
- USA
| | - Matteo Chiesa
- Laboratory for Energy and Nano-Sciences
- Khalifa University of Science and Technology
- Abu Dhabi
- United Arab Emirates
| | - Sokrates T. Pantelides
- Department of Physics and Astronomy
- Vanderbilt University
- Tennessee 37235
- USA
- Department of Electrical Engineering and Computer Science
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12
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Qi C, Zhou B, Wang C, Zheng Y, Fang H. A nonmonotonic dependence of the contact angles on the surface polarity for a model solid surface. Phys Chem Chem Phys 2017; 19:6665-6670. [DOI: 10.1039/c6cp08275k] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We found an unusual nonmonotonic contact angle dependence of the surface polarity (denoted as q) on a solid surface with specific charge patterns, where the contact angle firstly decreases and then increases as q increases from 0 e to 1.0 e.
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Affiliation(s)
- Chonghai Qi
- School of Physics
- Shandong University
- Jinan 250100
- China
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology
| | - Bo Zhou
- School of Electronic Engineering
- Chengdu Technological University
- Chengdu 611730
- China
| | - Chunlei Wang
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology
- Shanghai Institute of Applied Physics
- Chinese Academy of Sciences
- Shanghai 201800
- P. R. China
| | - Yujun Zheng
- School of Physics
- Shandong University
- Jinan 250100
- China
| | - Haiping Fang
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology
- Shanghai Institute of Applied Physics
- Chinese Academy of Sciences
- Shanghai 201800
- P. R. China
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13
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Liu K, Wang C, Ma J, Shi G, Yao X, Fang H, Song Y, Wang J. Janus effect of antifreeze proteins on ice nucleation. Proc Natl Acad Sci U S A 2016; 113:14739-14744. [PMID: 27930318 PMCID: PMC5187720 DOI: 10.1073/pnas.1614379114] [Citation(s) in RCA: 131] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The mechanism of ice nucleation at the molecular level remains largely unknown. Nature endows antifreeze proteins (AFPs) with the unique capability of controlling ice formation. However, the effect of AFPs on ice nucleation has been under debate. Here we report the observation of both depression and promotion effects of AFPs on ice nucleation via selectively binding the ice-binding face (IBF) and the non-ice-binding face (NIBF) of AFPs to solid substrates. Freezing temperature and delay time assays show that ice nucleation is depressed with the NIBF exposed to liquid water, whereas ice nucleation is facilitated with the IBF exposed to liquid water. The generality of this Janus effect is verified by investigating three representative AFPs. Molecular dynamics simulation analysis shows that the Janus effect can be established by the distinct structures of the hydration layer around IBF and NIBF. Our work greatly enhances the understanding of the mechanism of AFPs at the molecular level and brings insights to the fundamentals of heterogeneous ice nucleation.
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Affiliation(s)
- Kai Liu
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Chunlei Wang
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China;
| | - Ji Ma
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830046, People's Republic of China
| | - Guosheng Shi
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Xi Yao
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - Haiping Fang
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Yanlin Song
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Jianjun Wang
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China;
- School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
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14
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Abstract
The properties of bulk water come from a delicate balance of interactions on length scales encompassing several orders of magnitudes: i) the Hydrogen Bond (HBond) at the molecular scale and ii) the extension of this HBond network up to the macroscopic level. Here, we address the physics of water when the three dimensional extension of the HBond network is frustrated, so that the water molecules are forced to organize in only two dimensions. We account for the large scale fluctuating HBond network by an analytical mean-field percolation model. This approach provides a coherent interpretation of the different events experimentally (calorimetry, neutron, NMR, near and far infra-red spectroscopies) detected in interfacial water at 160, 220 and 250 K. Starting from an amorphous state of water at low temperature, these transitions are respectively interpreted as the onset of creation of transient low density patches of 4-HBonded molecules at 160 K, the percolation of these domains at 220 K and finally the total invasion of the surface by them at 250 K. The source of this surprising behaviour in 2D is the frustration of the natural bulk tetrahedral local geometry and the underlying very significant increase in entropy of the interfacial water molecules.
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15
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Wen YC, Zha S, Liu X, Yang S, Guo P, Shi G, Fang H, Shen YR, Tian C. Unveiling Microscopic Structures of Charged Water Interfaces by Surface-Specific Vibrational Spectroscopy. PHYSICAL REVIEW LETTERS 2016; 116:016101. [PMID: 26799031 DOI: 10.1103/physrevlett.116.016101] [Citation(s) in RCA: 184] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2015] [Indexed: 05/22/2023]
Abstract
A sum-frequency spectroscopy scheme is developed that allows the measurement of vibrational spectra of the interfacial molecular structure of charged water interfaces. The application of this scheme to a prototype lipid-aqueous interface as a demonstration reveals an interfacial hydrogen-bonding water layer structure that responds sensitively to the charge state of the lipid headgroup and its interaction with specific ions. This novel technique provides unique opportunities to search for better understanding of electrochemistry and biological aqueous interfaces at a deeper molecular level.
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Affiliation(s)
- Yu-Chieh Wen
- Department of Physics, State Key Laboratory of Surface Physics, and Key Laboratory of Micro- and Nano-Photonic Structures (MOE), Fudan University, Shanghai 200433, People's Republic of China
- Department of Physics, University of California, Berkeley, California 94720, USA
- Institute of Physics, Academia Sinica, Taipei 11529, Taiwan, Republic of China
| | - Shuai Zha
- Department of Physics, State Key Laboratory of Surface Physics, and Key Laboratory of Micro- and Nano-Photonic Structures (MOE), Fudan University, Shanghai 200433, People's Republic of China
| | - Xing Liu
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Shanshan Yang
- Department of Physics, State Key Laboratory of Surface Physics, and Key Laboratory of Micro- and Nano-Photonic Structures (MOE), Fudan University, Shanghai 200433, People's Republic of China
| | - Pan Guo
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Guosheng Shi
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Haiping Fang
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Y Ron Shen
- Department of Physics, State Key Laboratory of Surface Physics, and Key Laboratory of Micro- and Nano-Photonic Structures (MOE), Fudan University, Shanghai 200433, People's Republic of China
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - Chuanshan Tian
- Department of Physics, State Key Laboratory of Surface Physics, and Key Laboratory of Micro- and Nano-Photonic Structures (MOE), Fudan University, Shanghai 200433, People's Republic of China
- Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433, People's Republic of China
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