Chitosan-based polymer gel paper actuators coated with multi-wall carbon nanotubes and MnO2 composite electrode

Sun, Zhuangzhi; Song, Wenlong; Zhao, Gang; Wang, Haojun

doi:10.1007/s10570-017-1416-5

Cited by 38 publications

(19 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the reports on EC‐actuators based on redox pseudocapacitive materials are very limited to date. In a few reports, MnO 2 and RuO 2 are doped into carbon nanotubes, and the actuation properties of the composites are significantly improved due to higher specific capacitance . However, the design of composite materials does not fully demonstrate the deformation ability and potential application of pseudocapacitive materials in electrochemical actuators.…”

Section: Introductionmentioning

confidence: 99%

The Origin of Electrochemical Actuation of MnO₂/Ni Bilayer Film Derived by Redox Pseudocapacitive Process

Liu

et al. 2019

Adv Funct Materials

View full text Add to dashboard Cite

Pseudocapacitance-induced electrochemical actuators (EC-actuators) have attracted great attention in robots and artificial intelligence technologies.Despite major efforts to design such EC-actuators, a molecular-level understanding of the deformation mechanism is still lacking. Here, a reversible deformation of a freestanding MnO 2 /Ni bilayer film is demonstrated and in situ electrochemical atomic force microscopy, in situ Raman spectroscopy, and density functional theory simulation are used to study the origin of the deformation. The results show that the electrochemical actuation of the MnO 2 /Ni film is highly related with the redox pseudocapacitive behavior of MnO 2 layer. Valence state variation of Mn element, shortening and lengthening of MnO bond, and insertion and extraction of Na + ions, which all result from the redox pseudocapacitance of MnO 2 during charging and discharging, eventually lead to the reversible contraction and expansion of MnO 2 morphology. Such action counters with the nonactive Ni layer, finally inducing the reversible deformation of the MnO 2 /Ni bilayer film. It is believed that the study can provide useful guidance to design better EC-actuators in the future.hope our study could provide useful guidance to design better EC-actuators in the future.

show abstract

Section: Introductionmentioning

confidence: 99%

The Origin of Electrochemical Actuation of MnO₂/Ni Bilayer Film Derived by Redox Pseudocapacitive Process

Liu

et al. 2019

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

“…The most common stimulus-response materials that could be used for an engineered brush border system include poly(N-isopropyl acrylamide) (temperature sensitive nanobrush), ionic polymer-metal composites (charge sensitive nanobrush) 32 , or chitosan (pH-sensitive nanobrush) [33][34][35] . Among these materials, chitosan (CHI) is one of the most attractive for analysis of food, as the polymer is biocompatible, low cost, and has unique stimulus-response properties that can be easily controlled 36 .…”

Section: Introductionmentioning

confidence: 99%

Actuation of chitosan-aptamer nanobrush borders for pathogen sensing

Hills

Oliveira

Cavallaro

et al. 2018

Analyst

View full text Add to dashboard Cite

We demonstrate a sensing mechanism for rapid detection of Listeria monocytogenes in food samples using the actuation of chitosan-aptamer nanobrush borders. The bio-inspired soft material and sensing strategy mimic natural symbiotic systems, where low levels of bacteria are selectively captured from complex matrices. To engineer this biomimetic system, we first develop reduced graphene oxide/nanoplatinum (rGO-nPt) electrodes, and characterize the fundamental electrochemical behavior in the presence and absence of chitosan nanobrushes during actuation (pH-stimulated osmotic swelling). We then characterize the electrochemical behavior of the nanobrush when receptors (antibodies or DNA aptamers) are conjugated to the surface. Finally, we test various techniques to determine the most efficient capture strategy based on nanobrush actuation, and then apply the biosensors in a food product. Maximum cell capture occurs when aptamers conjugated to the nanobrush bind cells in the extended conformation (pH < 6), followed by impedance measurement in the collapsed nanobrush conformation (pH > 6). The aptamer-nanobrush hybrid material was more efficient than the antibody-nanobrush material, which was likely due to the relatively high adsorption capacity for aptamers. The biomimetic material was used to develop a rapid test (17 min) for selectively detecting L. monocytogenes at concentrations ranging from 9 to 107 CFU mL-1 with no pre-concentration, and in the presence of other Gram-positive cells (Listeria innocua and Staphylococcus aureus). Use of this bio-inspired material is among the most efficient for L. monocytogenes sensing to date, and does not require sample pretreatment, making nanobrush borders a promising new material for rapid pathogen detection in food.

show abstract

“…The sol-gel method is an important method for synthesizing inorganic compounds or inorganic materials under low temperature or mild conditions, and plays an important role in soft chemical synthesis. It has obtained important applications in the preparation of glass, ceramics, films, fibers, composite materials, etc., and is more widely used in the preparation of nanoparticles [28][29][30].…”

Section: Application Of Sol-gel Methods In Nano-coatingmentioning

confidence: 99%

Technical Characteristics and Wear-Resistant Mechanism of Nano Coatings: A Review

et al. 2020

Coatings

View full text Add to dashboard Cite

Nano-coating has been a hot issue in recent years. It has good volume effect and surface effect, and can effectively improve the mechanical properties, corrosion resistance and wear resistance of the coatings. It is important to improve the wear resistance of the material surface. The successful preparation of nano-coatings directly affects the application of nano-coatings. Firstly, the preparation methods of conventional surface coatings such as chemical vapor deposition and physical vapor deposition, as well as the newly developed surface coating preparation methods such as sol-gel method, laser cladding and thermal spraying are reviewed in detail. The preparation principle, advantages and disadvantages and the application of each preparation method in nano-coating are analyzed and summarized. Secondly, the types of nano-coating materials are summarized and analyzed by inorganic/inorganic nanomaterial coatings and organic/inorganic nanomaterial coatings, and their research progress is summarized. Finally, the wear-resistant mechanism of nano-coatings is revealed from three aspects: grain refinement, phase transformation toughening mechanism and nano-effects. The application prospects of nano-coatings and the development potential combined with 3D technology are prospected.

show abstract

Chitosan-based polymer gel paper actuators coated with multi-wall carbon nanotubes and MnO2 composite electrode

Cited by 38 publications

References 17 publications

The Origin of Electrochemical Actuation of MnO₂/Ni Bilayer Film Derived by Redox Pseudocapacitive Process

The Origin of Electrochemical Actuation of MnO₂/Ni Bilayer Film Derived by Redox Pseudocapacitive Process

Actuation of chitosan-aptamer nanobrush borders for pathogen sensing

Technical Characteristics and Wear-Resistant Mechanism of Nano Coatings: A Review

Contact Info

Product

Resources

About

Chitosan-based polymer gel paper actuators coated with multi-wall carbon nanotubes and MnO2 composite electrode

Cited by 38 publications

References 17 publications

The Origin of Electrochemical Actuation of MnO2/Ni Bilayer Film Derived by Redox Pseudocapacitive Process

The Origin of Electrochemical Actuation of MnO2/Ni Bilayer Film Derived by Redox Pseudocapacitive Process

Actuation of chitosan-aptamer nanobrush borders for pathogen sensing

Technical Characteristics and Wear-Resistant Mechanism of Nano Coatings: A Review

Contact Info

Product

Resources

About

The Origin of Electrochemical Actuation of MnO₂/Ni Bilayer Film Derived by Redox Pseudocapacitive Process

The Origin of Electrochemical Actuation of MnO₂/Ni Bilayer Film Derived by Redox Pseudocapacitive Process