To overcome the low efficiency of single-responsive smart surfaces, we have constructed a dual-responsive smart surface - poly(spiropyran-co-N-isopropylacrylamide) (poly(SP-co-NiPAAm))-grafted silicon nanowire arrays - by combining photo-responsive SP and thermo-responsive NiPAAm units for enhancing the efficiencies of cancer-cell capture and release. These enhanced efficiencies probably originate from the binary cooperative effect of two responsive building units: NiPAAm units can decrease the steric hindrance between SP units during the isomerization while SP units can facilitate phase transition of NiPAAm units. This study provides a new strategy for designing smart materials and surfaces with efficient responsiveness for biomedical applications.

Hao Yuwei    Hongliang Liu    Li Guannan    Cui Haijun    江雷     Shutao Wang   

ChemPhysChem

2018

Large-scale porphyrin nanostructures including jar-, flask-, cup-, open smile-/tulip- and chain-like were facilely fabricated on a hydrophobic substrate at the oil-aqueous interface, by varying the assembly temperature. This is of great significance for the design and creation of novel porphyrin structures and their extended applications in optic devices.

Cai Jin-Hua    Liu Junchao    Wang Ting    Jingxia Wang    江雷    

Journal of Materials Chemistry C

2018

In nature, hierarchically assembled nanoscale ionic conductors, such as ion channels and ion pumps, become the structural and functional basis of bioelectric phenomena. Recently, ion-channel-mimetic nanofluidic systems have been built into reconstructed 2D nanomaterials for energy conversion and storage as effective as the electrogenic cells. Here, a 2D-material-based nanofluidic reverse electrodialysis system, containing cascading lamellar nanochannels in oppositely charged graphene oxide membrane (GOM) pairs, is reported for efficient osmotic energy conversion. Through preassembly modification, the surface charge polarity of the 2D nanochannels can be efficiently tuned from negative (−123 mC m) to positive (+147 mC m), yielding strongly cation- or anion-selective GOMs. The complementary two-way ion diffusion leads to an efficient charge separation process, creating superposed electrochemical potential difference and ionic flux. An output power density of 0.77 W m is achieved by controlled mixing concentrated (0.5 m) and diluted ionic solutions (0.01 m), which is about 54% higher than using commercial ion exchange membranes. Tandem alternating GOM pairs produce high voltage up to 2.7 V to power electronic devices. Besides simple salt solutions, various complex electrolyte solutions can be used as energy sources. These findings provide insights to construct cascading nanofluidic circuits for energy, environmental, and healthcare applications.

Ji Jinzhao    Kang Qian    Zhou Yi    Feng Yaping    Chen Xi    袁金颖    Wei Guo    Wei Yen    江雷    

Advanced Functional Materials

2017

Zang Dongmian    Yi Hui    Gu Zhandong    Chen Lie    Han Dong    Xinglin Guo    Shutao Wang    刘明杰    江雷    

Advanced Materials

2017

程群峰    江雷    

Angewandte Chemie - International Edition

2017

After billions of years of evolution, natural materials, such as bamboo, bone, and nacre, show unique mechanical properties, due to their intrinsic hierarchical micro/nanoscale architecture and abundant interfacial interactions. This relationship between architecture, interfacial interactions, and mechanical properties of natural materials, supplies the inspiration for constructing high performance lightweight nanocomposites. Graphene's high tensile strength, Young's modulus, and electrical conductivity when compared with other nanomaterials make it an ideal building block for constructing high performance bioinspired nanocomposites. Such nanocomposites demonstrate promise for applications in many fields, including aerospace, aeronautics, submarine devices, car, and flexible electronic devices. In this review, we focus on the bioinspired strategy for preparing graphene-based nanocomposites (GBNs), and discuss the various interfacial interactions. Then the synergistic effects from building blocks and interfacial interactions are discussed in detail, along with the resultant GBNs used in the applications of sensors, actuators, supercapacitors, and nanogenerators, are also illustrated. These GBNs include, for example, one-dimensional (1D) fiber, two-dimensional (2D) film, and three-dimensional (3D) bulk nanocomposites. Finally, we provide our perspective on GBNs, and discuss how to efficiently mimic natural materials for creating new multifunctional bioinspired nanocomposites for practical applications in the near future.

Gong Shanshan    Ni Hong    江雷     程群峰   

Materials Today

2017

刘明杰    Shutao Wang    江雷    

Small

2017

Excellent fatigue resistance is a prerequisite for flexible energy devices to achieve high and stable performance under repeated deformation state. Inspired by the sophisticated interfacial architecture of nacre, herein a super fatigue-resistant graphene-based nanocomposite with integrated high tensile strength and toughness through poly(dopamine)-nickel ion (Ni) chelate architecture that mimics byssal threads is demonstrated. These kind of synergistic interfacial interactions of covalent and ionic bonding effectively suppress the crack propagation in the process of fatigue testing, resulting in superhigh fatigue life of this bioinspired graphene-based nanocomposite (BGBN). In addition, the electrical conductivity is well kept after fatigue testing. The proposed synergistic interfacial interactions could serve as a guideline for fabricating high-performance multifunctional BGBNs with promising applications in flexible energy devices, such as flexible electrodes for supercapacitors and lithium batteries, etc.

Wan Sijie    Xu Feiyu    江雷     程群峰   

Advanced Functional Materials

2017

Unidirectional liquid spreading without energy input has attracted considerable attention due to various potential applications such as biofluidics devices and self-lubrication. Introducing a surface wettable gradient or asymmetric nanostructures onto the surface has successfully harnessed the liquid to spread unidirectionally. However, these surfaces are still plagued with problems that restrict their practical applications: fixed spreading state for a fixed surface, and spreading slowly over a short distance. Herein, bioinspired from the fast continuous unidirectional water transport on the peristome of Nepenthes alata, we report a smart peristome with temperature-controlled unidirectional water spreading. The smart artificial peristome was fabricated by grafting the thermoresponsive material PNIPAAm onto the artificial PDMS peristome. Unidirectional water spreading on the smart peristome can be dynamically regulated by changing the surface temperature. Besides, the water spreading is demonstrated with a remarkable reversibility and stability. By investigating the relationship between liquid spreading distance and wettability, the underlying mechanism was revealed. This work gives a new way to achieve the control of unidirectional liquid spreading available for controllable microfluidics and medical devices.

Zhang Pengfei    Huawei Chen    Laifeng Li    Hongliang Liu    Liu Guang    Zhang Liwen    Zhang Deyuan    江雷    

ACS Applied Materials and Interfaces

2017

This paper presents the three-point bending properties of 3D needle-punched composites with two fiber architectures at room and elevated temperatures. The influences of temperature and fiber architectures on the load/deflection curves, bending strength and bending stiffness are analyzed. Macro-Fracture morphology and SEM micrographs are examined to understand the damage and failure mechanism. The results show that the bending properties of plain structure needle-punched composites are superior to those with non-woven structure. Meanwhile, the bending properties of composites decrease significantly with the increase of testing temperature. Moreover, the damage and failure patterns of composites vary with fiber architecture and testing temperatures. For the plain structure, 90 ° and 0 ° fiber bundles can bear the load together. At room temperature, the composite shows brittle fracture feature and exhibits local damage with matrix cracking, breakage and tearing of the fibers. While at a higher temperature, the composite shows less fracture and becomes more softened and plastic. It damages with matrix cracking, falling off and plastic deformation, fiber layer/web delaminating, and interface debonding.

Jiang Nan    Diansen Li    Yao Qian-qian    江雷    

Fibers and Polymers

2017