Publications
D.Sc. Wendong Liu （刘文东）
A full list of our publications can be found at google scholar or Publons.
Journal
Publications
First author
1. Fabrication and applications of the protein patterns.
Liu Wendong, Li Yunfeng and Yang Bai*
Sci. China Chem. 2013, 56 (8), 1087-1100. (English)
（中国科学：化学 2013年43卷第9期：1149-1163） (Chinese)
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Protein has been widely used for fabricating patterned structures since it is one of the most important macromolecules in living organisms, and protein patterns possess potential applications in many fields such as medical diagnosis, tissue engineering, biosensors, and medical screening. At present, there are two fashions to fabricate protein patterns: one is grafting the protein to the microstructure which is prepared by micro-fabrication techniques; the other one is achieving the patterned protein structures directly. Here we provide an overview on current status of the fabrication techniques and the applications of the protein patterns, and then give an outlook on the development of the fabrication techniques and the prospective applications of the protein patterns in future research.
Wendong Liu, Yunfeng Li, Tieqiang Wang, Daowei Li, Liping Fang, Shoujun Zhu,Huaizhong Shen, Junhu Zhang, Hongchen Sun, and Bai Yang*
ACS Appl. Mater. Interfaces 2013, 5, 12587−12593.
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A novel method to fabricate elliptical ring arrays of proteins is provides. The protein arrays are prepared by covalently grafting proteins to the polymer brush ring arrays which are prepared by the techniques combining colloidal lithography dewetting and surface initiated atom transfer radical polymerization (SI-ATRP). Through this method, the parameters of protein patterns, such as height,wall thickness, periods, and distances between two elliptical rings, can be finely regulated. In addition, the sample which contains the elliptical protein ring arrays can be prepared over a large area up to 1 cm2, and the protein on the ring maintains its biological activity. The as-prepared ring and elliptical ring arrays (ERAs) of fibronectin can promote cell adhesion and may have an active effect on the formation of the actin cytoskeleton.
Wendong Liu, Xueyao Liu, Jiaozi Fangteng, Shuli Wang, Liping Fang, Huaizhong Shen, Siyuan Xiang, Hongchen Sun and Bai Yang*
Nanoscale 2014, 6, 13845.
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A facile method is prensented to fabricate bioinspired polyethylene terephthalate (PET) nanocone arrays via colloidal lithography. The aspect ratio (AR) of the nanocones can be finely modulated ranging from 1 to 6 by regulating the etching time. The samples with the AR value of 6 can present underwater superoleophobicity with the underwater oil contact angle (OCA) of 171.8°. The as-prepared PET nanocone arrays perform anti-bioadhesion behavior, which inhibits the formation of the actin cytoskeleton when itused as the substrate for cell culture. Moreover, the oil wettability is temperature controlled after modifyingthe PET nanocone arrays with PNIPAAm film, and the oil wettability of the functionalized nanocone arrays can be transformed from the superoleophobic state with OCA about 151° to the oleophilic state with OCA about 25° reversibly. Due to the high-throughput, parallel fabrication and cost-efficiency of this method, it will be favourable for researchers to introduce oleophobic properties to various substrate and device surfaces. Due to the superoleophobicity and simple functionalizing properties, the PET nanocone arrays are very promising surfaces for anti-adhesion, self-cleaning and have potential applications inmaterial, medical, and biological fields.
Wendong Liu, Xueyao Liu, Peng Ge, Liping Fang, Siyuan Xiang, Xiaohuan Zhao, Huaizhong Shen,and Bai Yang*
ACS Appl. Mater. Interfaces 2015, 7, 24760−24771.
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This work provides a facile and cost-efficient method to prepare single-strand DNA (ssDNA) nanocone arrays and hierarchical DNA patterns that were mediated by poly(2-hydroxyethyl methacrylate) (PHEMA) brush. The PHEMA brush nanocone arrays with different morphology and period were fabricated via colloidal lithography. The hierarchical structure was prepared through the combination of colloidal lithography and traditional photolithography. The DNA patterns were easily achieved via grafting the amino group modified ssDNA onto the side chain of polymer brush, and the anchored DNA maintained their reactivity. The as-prepared ssDNA nanocone arrays can be applied for target DNA sensing with the detection limit reaching1.65 nM. Besides, with the help of introducing microfluidic ideology, the hierarchical-multiplex DNA patterns on the same substrate could be easily achieved with each kind of pattern possessing one kind of ssDNA, which are promising surfaces for the preparation of rapid, visible, and multiplex DNA sensors.
Wendong Liu, Xueyao Liu, Siyuan Xiang, Yixin Chen, Liping Fang, and Bai Yang*
Nano Res. 2016, 9, 3141-3151.
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A functional interface based on silicon chamfer nanocylinder arrays (CNCAs) was successfully fabricated by secondary etching of silicon nanopillar arrays via a facile inclined etching method. The feature structure of this novel CNCAs was finely modulated by varying the structure parameter of the nanopillar arrays and the etching conditions. The underwater oil wetting behavior of this CNCAs-based interface can be easily modulated from superoleophilic (oil contact angle (OCA) ca. 8.13°) to superoleophobic (OCA ca. 163.79°) states by modifying the surface with different substances. Moreover, a reversible underwater oil wetting behavior from superoleophobic (OCA ca. 155.67°) to oleophilic (OCA ca. 31.27°) states was achieved by grafting a temperature-responsive polymer onto this specific asymmetric structure. Thus functional interface showed an isotropic wetting behavior under certain oleophilic condition. Chemically-heterogeneous structures, obtained via asymmetry modification of CNCAs, showed amphiphobic properties while maintaining their anisotropic wetting ability.
Wendong Liu, and Bai Yang*
Chinese Chem. Lett. 2017, 28: 675–690.
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With the highly interdisciplinary of research and great development of microfabrication techniques, patterned surfaces have attracted great attention of researchers since they possess specific regularity and orderness of structures. In recent years, series of two dimensional patterned structures have been successfully fabricated, and widely used in anti-reflection, anti-fogging, self-cleaning, and sensing, etc. In the meantime, patterned structures have been gradually used in biologically relative fields such as biomaterials, aiming to deepen the perception of organism and understand the vital movements of human body. In this review, we provide a brief introduction on current status of techniques for two dimensional patterns fabrication, the applications of patterned surfaces in biologically related fields, and give out a prospective on the development of these patterned surfaces in the future.
7. Segregation in Drying Binary Colloidal Droplets
Wendong Liu,# Jiarul Midya,# Michael Kappl, Hans-Jürgen Butt,* and Arash Nikoubashman
ACS Nano 2019, 13(5), 4972-4979.
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When a colloidal suspension droplet evaporates from a solid surface, it leaves a characteristic deposit in the contact region. These deposits are common and important for many applications in printing, coating, or washing. By the use of superamphiphobic surfaces as a substrate, the contact area can be reduced so that evaporation is almost radially symmetric. While drying, the droplets maintain a nearly perfect spherical shape. Here, we exploit this phenomenon to fabricate supraparticles from bidisperse colloidal aqueous suspensions. The supraparticles have a core–shell morphology. The outer region is predominantly occupied by small colloids, forming a close-packed crystalline structure. Toward the center, the number of large colloids increases and they are packed amorphously. The extent of this stratification decreases with decreasing the evaporation rate. Complementary simulations indicate that evaporation leads to a local increase in density, which, in turn, exerts stronger inward forces on the larger colloids. A comparison between experiments and simulations suggest that hydrodynamic interactions between the suspended colloids reduce the extent of stratification. Our findings are relevant for the fabrication of supraparticles for applications in the fields of chromatography, catalysis, drug delivery, photonics, and a better understanding of spray-drying.
8. Tuning the Porosity of Supraparticles
Wendong Liu, Michael Kappl,* and Hans-Jürgen Butt
ACS Nano 2019, 13 (12), 13949-13956.
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Supraparticles consisting of nano- or microparticles have potential applications as e.g., photonic crystals, drug carriers, or heterogeneous catalysts. To avoid the use of solvent or processing liquid one can make supraparticles by evaporating droplets of aqueous suspensions from super-liquid-repellent surfaces. Herein, a method to adjust the porosity of supraparticles is described; a high porosity is desired, e.g., in catalysis. To prepare highly porous TiO2 supraparticles, polymer nanoparticles are co-dispersed in the suspension. Supraparticles are formed through evaporation of aqueous suspension droplets on superamphiphobic surfaces followed by calcination of the sacrificial polymer particles. The increase of porosity of up to 92%, resulted in enhanced photocatalytic activity while maintaining sufficient mechanical stability.
Wendong Liu,* Siyuan Xiang, Xueyao Liu, and Bai Yang*
ACS Nano 2020, 14(7), 9166-9175.
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A super-antiwetting surface based on low-aspect-ratio hierarchical cylinder arrays (HCAs) was successfully obtained on a silica substrate by colloidal lithography with photolithography. Colloidal lithography is a technique involving transfer a pattern to a substrate by etching or exposure to a radiation source through a mask composed of a packed colloidal crystal, while photolithography is utilized by which a pattern is transferred photographically to a photoresist-coated substrate, and the substrate subsequently etched. The surface provides an alternative approach to apply aligned micro-nano integrated structures with a relatively low aspect ratio in super-antiwetting. The obtained HCAs successfully integrated micro- and nanoscale structures into one system, and the physical structure of the HCAs can be tuned by modulating the fabrication approach. Using a post-modification process, the underwater oil wetting behavior of cylinder-array based surfaces can be easily modulated from the superoleophobic state (an oil contact angle (OCA) of 161°) to oleophilic state (an OCA of 19°). Moreover, the underwater oil wettability can be reversibly transformed from the superoleophobic state (an OCA of approximately 153°) into the oleophilic state (an OCA of approximately 31°) by grafting stimuli-responsive polymer (PNIPAAm) brushes onto this specific hierarchical structure. Due to the temperature-responsive property, modifying the surface with PNIPAAm provides the possibility in controlling the oil wettability (repellent or sticky) by temperature, which will benefit to use HCAs in oil-water separation and other application fields.
10. Self-Healing Superhydrophobic Surfaces: Healing Principles and Applications
Siyuan Xiang, and Wendong Liu*
Advanced Materials Interfaces 2021, 8(12), 2100247.
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Superhydrophobic surfaces have already been applied in anti-fouling, water-oil separation, liquid transportation, etc. Surfaces can be defined as superhydrophobic surfaces once they can support a water droplet with its spherical shape maintained and accompanied by an apparent contact angle larger than 150° and a rolling-off angle below 10°. Such water repellent property is achieved by the synergetic action of hierarchical structures and the low-surface energy of the substances constructing the surface. Structures with high aspect ratio always perform good superhydrophobicity. However, they are usually with poor mechanical stability. Since durability is one of the essential factors for practical use, exploiting robust superhydrophobic surfaces has attracted tremendous interest. During the past decade, great effort has been made in developing self-healing superhydrophobic surfaces to improve the potential practice and broaden the application fields. An overview of the recent development of self-healing superhydrophobic surfaces is provided in this review. The focus here is particularly on the fabrication process based on specific healing mechanisms and possible applications. Finally, an outlook on future fabrication techniques for durable superhydrophobic surfaces is presented.
Coauthor
2021
1. Irregular, nanostructured superhydrophobic surfaces: Local wetting and slippage monitored by fluorescence correlation spectroscopy.
Xin Zhao, Andreas Best, Wendong Liu, Kaloian Koynov,* Hans-Jürgen Butt, and Clarissa Schönecker
Phys. Rev. Fluids, 2021, 6(5), 054004.
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2019
5. Responsive Ionogel Surface with Renewable Antibiofouling Properties.
Lijun Ye, Fei Chen, Jie Liu, Aiting Gao, Gunnar Kircher, Wendong Liu, Michael Kappl, Seraphine Wegner, Hans-Jürgen Butt, and Werner Steffen*
Macromol. Rapid Commun., 2019, 1900395.
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4. Facile Synthesis of ZnO-Au Nanopetals and Their Application for Biomolecule Determinations.
Siyuan Xiang, Qingnan Meng, Kai Zhang,* Yue Gu, Wendong Liu, and Bai Yang
Chem. Res. Chinese Universities, 2019, 35(5), 924―928.
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3. Highly ordered 3D-silver nanoring arrays (3D-AgNRAs) for refractometric sensing.
Xueyao Liu, Wendong Liu, and Bai Yang*
J. Mater. Chem. C, 2019, 7, 7681-7691.
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Xueyao Liu, Wendong Liu, and Bai Yang*
Nano Res. 2019, 12, 845-853.
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Peihong Xue, Wendong Liu, Zhongyi Gu, Xingchi Chen, Jingjie Nan, Junhu Zhang*, Hongchen Sun, Zhanchen Cui, and Bai Yang
ACS Appl. Mater. Interfaces, 2019, 11 (1), 1595–1603.
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2018
Liping Fang, Xueyao Liu, Siyuan Xiang, Wendong Liu, Huaizhong Shen, Zibo Li, Kai Zhang*, Wei Song*, and Bai Yang
Nanotechnology 2018, 29, 405301.
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2. Smart Anisotropic Wetting Surfaces with Reversed pH-Responsive Wetting Directions.
Peng Ge, Jianglei Zhang, Yongshun Liu, Shuli Wang, Wendong Liu, Nianzuo Yu, Yuxin Wu, Junhu Zhang,* and Bai Yang
Adv. Funct. Mater. 2018, 28, 1802001
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2017
1. Anisotropic Wetting of Water on Patterned Asymmetric Nanostructure Arrays.
Peng Ge, Shuli Wang, Wendong Liu, Tieqiang Wang, Nianzuo Yu, Peihong Xue, Hongxu Chen, Huaizhong Shen, Junhu Zhang,* and Bai Yang
Adv. Mater. Interfaces 2017, 4, 1700034.
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2. Au nanorods-sensitized 1DPC for visible detection of NIR light.
Huaizhong Shen, Yuxin Wu, Wenjing Wang, Hongyang Su, Wendong Liu, Junhu Zhang, Kai Zhang,* and Bai Yang
J. Mater. Chem. C 2017, 5, 2942-2950.
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3. Autonomous Control of Fluids in a Wide Surface Tension Range in Microfluidics.
Peng Ge, Shuli Wang, Yongshun Liu, Wendong Liu, Nianzuo Yu, Jianglei Zhang, Huaizhong Shen, Junhu Zhang*, and Bai Yang
Langmuir 2017, 33 (29), 7248–7255.
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Siyuan Xiang, Hu-Jun Qian, Yixin Chen, Kai Zhang*, Yanhong Shi, Wendong Liu, Haizhu Sun, Hongchen Sun, and Bai Yang
Chem. Mater. 2017, 29 (15), 6536–6543.
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5. Highly sensitive deep-silver-nanowell arrays (d-AgNWAs) for refractometric sensing.
Xueyao Liu, Wendong Liu, Liping Fang, Shunsheng Ye, Huaizhong Shen, and Bai Yang*
Nano Res. 2017, 10(3): 908–921.
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6. Thermal-Responsive Anisotropic Wetting Microstructures for Manipulation of Fluids in Microfluidics.
Nianzuo Yu, Shuli Wang, Yongshun Liu, Peihong Xue, Peng Ge, Jingjie Nan, Shunsheng Ye, Wendong Liu, Junhu Zhang*, and Bai Yang
Langmuir 2017, 33 (2), 494–502.
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7. Unidirectional Wetting of Liquids on “Janus” Nanostructure Arrays under Various Media.
Peng Ge, Shuli Wang, Wendong Liu, Tieqiang Wang, Nianzuo Yu, Shunsheng Ye, Huaizhong Shen, Yuxin Wu, Junhu Zhang*, and Bai Yang
Langmuir 2017, 33 (9), 2177–2184.
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2016
Siyuan Xiang, Dandan Wang, Kai Zhang,* Wendong Liu, Ce Wu, Qingnan Meng, Hongchen Sun, and Bai Yang
Chem. Commun. 2016,52, 10155-10158.
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Shuli Wang, Nianzuo Yu, Tieqiang Wang, Peng Ge, Shunsheng Ye, Peihong Xue, Wendong Liu, Huaizhong Shen, Junhu Zhang*, and Bai Yang
ACS Appl. Mater. Interfaces 2016, 8 (20), 13094–13103.
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3. Multifunctional Reversible Fluorescent Controller Based on a One-Dimensional Photonic Crystal.
Yuxin Wu, Huaizhong Shen, Shunsheng Ye, Dong Yao, Wendong Liu, Junhu Zhang, Kai Zhang*, and Bai Yang
ACS Appl. Mater. Interfaces 2016, 8 (42), 28844–28852.
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2015
1. Ag nanoparticle/polymer composite barcode nanorods.
Hongxu Chen, Tieqiang Wang, Huaizhong Shen, Wendong Liu, Shuli Wang, Kun Liu, Junhu Zhang,* Bai Yang
Nano Res. 2015, 8(9): 2871–2880.
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Yuanyuan Zhan, Jianqiang Zhao, Wendong Liu, Bai Yang, Jia Wei, and Yanlei Yu*
ACS Appl. Mater. Interfaces 2015, 7 (45), 25522–25528.
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3. From 1D to 3D: a new route to fabricate tridimensional structures via photo-generation of silver networks.
Huaizhong Shen, Yuxin Wu, Liping Fang, Shunsheng Ye, Zhaoyi Wang, Wendong Liu, Zhongkai Cheng, Junhu Zhang, Zhanhua Wang*, and Bai Yang*
RSC Adv. 2015, 5, 28633-28642.
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2014
Daowei Li, Haizhu Sun, Liming Jiang, Kai Zhang, Wendong Liu, Yang Zhu, Jiaozi Fangteng, Ce Shi, Liang Zhao, Hongchen Sun*, and Bai Yang
ACS Appl. Mater. Interfaces 2014, 6 (12), 9402–9410.
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2. Tunable Polymer Brush/Au NPs Hybrid Plasmonic Arrays Based on Host–guest Interaction.
Liping Fang, Yunfeng Li, Zhaolai Chen, Wendong Liu, Junhu Zhang, Siyuan Xiang, Huaizhong Shen, Zibo Li, and Bai Yang*
ACS Appl. Mater. Interfaces 2014, 6 (22), 19951–19957.
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2013
1. Hierarchical Polymer Brush Nanoarrays: A Versatile Way to Prepare Multiscale Patterns of Proteins.
Yunfeng Li, Junhu Zhang, Wendong Liu, Daowei Li, Liping Fang, Hongchen Sun, and Bai Yang*
ACS Appl. Mater. Interfaces 2013, 5 (6), 2126–2132.
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2012
1. Polymer brush nanopatterns with controllable features for protein pattern applications.
Yunfeng Li, Junhu Zhang, Liping Fang, Liming Jiang, Wendong Liu, Tieqiang Wang, Liying Cui, Hongchen Sun, and Bai Yang*
J. Mater. Chem. 2012,22, 25116-25122.
Contribute to Book Publications
1. Chapter 5: 'Photonic crystals fabricated via facile methods and their applications'
contribute for the book 'Photonic Materials for Sensing, Biosensing and Display Devices', Springer International Publishing Switzerland 2016, M. Serpe et al. (eds.), Springer Series in Materials Science 229,
Wendong Liu, Xueyao Liu, and Bai Yang*
Volume 229 of the series Springer Series in Materials Science pp 101-158. Chapter DOI 10.1007/978-3-319-24990-2_5.
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With the highly development of the fields of material science, sensing and display, photonic crystal structure has been proposed to be the most potential structure to be used in novel optical devices, convenient sensors and play a key role in the next generation of information technology. Since the photonic crystal structure can finely control the optical properties of materials and respond to light waves over a desired range of frequencies by perfectly reflecting, or allowing them to propagate only in certain directions, or confining them within a specified volume, which is caused by the one dimensional (1D), two dimensional (2D), and three dimensional (3D) photonic crystal. And many micro- and nano-fabrication methods have been developed to prepare photonic crystals such as holographic laser lithography, phase-mask holography, direct ink writing, and direct laser writing. Herein, we present a review focus on the fabrication of photonic crystals from 1D to 3D via facile methods and the applications of the photonic crystals in the fields of sensing and display. The previous section is focused on the introduction of Different 1D photonics include organic, organic, and organic-inorganic hybrid packs which were fabricated by spin-coating; 2D photonic crystals evolved by colloidal chemistry (colloidal lithography and Colloidal self assembly), and 3D photonic crystals prepared by the assembly of colloidal crystal, while other facile methods were briefly introduced as a extends of the knowledge. Then we present a review of the applications of the photonic crystals fabricated via the methods mentioned in the previous part which covered the fields of display and sensing, including photonic crystals integrated in LED to enhance light extraction, two-dimensional structures for antireflective surfaces, photonic crystals used for fluorescence enhancement, full color display and photonic paper, physical sensors (Temperature and mechanical measuring), chemical sensor (pH, vapor, ion, humidity, organic solvents, and specific chemical substance analysis), biological sensors (DNA, protein, toxin, bacteria, and viral analyzing). In the final, we give a summary and perspective of the developing direction of the field of photonic crystals including fabrication techniques developing and broadening of the application fields in near future.
2. Chapter 6: 'Silicon/polymer composite nanopost arrays'
contribute for the book 'Silicon Nanomaterials Sourcebook: Arrays, Functional Materials, Industrial Nanosilicon', CRC Press Taylor & Francis Group 6000 Broken Sound Parkway NW, Suite 300 Boca Raton, FL 33487-2742 © 2017 by Taylor & Francis Group, LLC. Klaus D. Sattler et al. (eds.), Volume Two, 1st edition. pp 153-166.
Xueyao Liu, Wendong Liu, and Bai Yang*
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Silicon nanostructures have played an important role in the development of the semiconductor industry. They have proved to be promising building blocks for devices in the fields of optoelectronics, energy conversion, nanoelectronics, energy storage, and bio (chemical) sensors. Silicon nanopost arrays have aroused great attention, owing to their reproducible and facile fabrication process, and adjustable structure parameters. Attributed to the silicon nanopost arrays’ efficient light trapping assisted by the interactions of light within the space between the posts, they exhibit increased light-harvesting properties in contrast to flat surfaces, which makes them ideal for solar energy applications. Moreover, periodic silicon nanopost arrays are two-dimensional photonic crystal (2DPC), which presents vivid structural colors due to their specific photonic band gap. They are therefore considered to be potential candidates for building biological or chemical sensors. Furthermore, owing to the high surface area, they have been studied for use as substrates for cell adhesion and gene delivery.
Composite materials possess the combination of the properties of each component or even better properties when the individual components cooperate synergistically and exert superior performance to all the components alone. Silicon/polymer nanopost arrays are therefore gifted with the advantages of both silicon nanopost arrays and polymers. Responsive polymer nanostructures are expected to be of great importance for the smart surfaces or channels, biointerfaces, diagnostics, microfluidic devices, and sensors realization. The modification of intelligent responsive polymers, such as light-driven configuration tunable, thermoresponsive polymers, and polymers with variable wettability and functions, suggests great potential for the composite silicon/polymer nanopost arrays for multifunctional devices.
Herein we will review the fabrication methods of silicon/polymer composite nanopost arrays, the consequent properties brought by the composite structures, and the related application areas of the silicon/polymer composite nanopost arrays, including sensing, separation, biointerfaces, and photoelectric devices. Finally, we’ll provide a summary and perspective of the developing direction of silicon/polymer composite nanopost arrays, including the development trend of fabrication approaches and the broadening of the application fields in the near future.
3. Chapter 2: 'Self-Recovery Superhydrophobic Surfaces'
contribute for the book 'Materials with Extreme Wetting Properties: Methods and Emerging Industrial Applications', Springer International Publishing Switzerland 2021, Hosseini, Majid & Karapanagiotis, Ioannis (eds.), 1st edition, pp 39-61.
Wendong Liu,* Michael Kappl, Hans-Jürgen Butt
Chapter DOI 10.1007/978-3-030-59565-4_2.
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Superhydrophobic surfaces are already being used in processes such as self-cleaning, water-oil separation, water harvesting, and other fields. Surfaces are defined as superhydrophobic when they consist of densely packed protrusions on the nano- and/or microscale, with side walls that have tilt angles exceeding the advancing contact angle of water on the specific materials. This state is achieved by combining hierarchical roughness and low-surface energy of the materials forming the surface. High aspect structures made of organic materials are, however, usually mechanically weak. The durability of superhydrophobic surfaces is an essential factor when considering practical applications. During the last decade, researchers invested significant time and effort into developing self-recovery superhydrophobic surfaces in order to broaden the range of further possible applications. An overview of self-recovery superhydrophobic surfaces is provided in this chapter, with a particular focus on the status of current fabrication processes and possible applications. In addition, an outlook on future fabrication techniques for creating robust and durable superhydrophobic surfaces is presented.