Polyurethane Blended with Silica-Nanoparticle-Modified Graphene as a Flexible and Superhydrophobic Conductive Coating with a Self-Healing Ability for Sensing Applications

2022 ◽  
Author(s):  
Kunlin Chen ◽  
Han Liu ◽  
Jianlin Zhou ◽  
Yangyi Sun ◽  
Kejing Yu
Keyword(s):  
Silica Nanoparticle ◽  
Self Healing ◽  
Conductive Coating ◽  
Sensing Applications ◽  
Modified Graphene

Graphene Nano-Biosensors for Detection of Cancer Risk

2012 ◽  
Vol 711 ◽  
pp. 246-252 ◽  
Author(s):  
Owen J. Guy ◽  
Gregory Burwell ◽  
Zari Tehrani ◽  
Ambroise Castaing ◽  
Kelly Ann Walker ◽  
...  
Keyword(s):  
High Vacuum ◽  
Epitaxial Graphene ◽  
Electrical Signal ◽  
Early Detection Of Disease ◽  
Disease Biomarkers ◽  
Sensing Applications ◽  
Highly Sensitive ◽  
Surface Functionalisation ◽  
Graphene Devices ◽  
Modified Graphene

Biosensor diagnostics based on bio-functionalized semiconductor devices are an important development in ultrasensitive sensors for early detection of disease biomarkers. Electrochemical devices using chemically modified graphene (CMG) channels are excellent candidates for nanobiosensors. This paper presents the development of novel antibody functionalized epitaxial graphene devices for bio-sensing applications. Epitaxial graphene has been grown on silicon carbide (SiC) substrates under high vacuum and high temperature conditions (1200 – 1700°C). A generic electrochemical surface functionalisation chemistry, which can be used to attach a variety of “bio-receptors” to graphitic surfaces, has been developed. The attached bio-receptors are capable of specific and selective interaction with disease biomarkers. When a target biomarker molecule interacts with the “bio-receptor” functionalized surface, the charge density at that surface is affected. This change can be detected as an electrical signal from the biosensor, enabling highly sensitive (nM) detection of biomarker analytes. This paper reports the fabrication of graphene channel sensors for detection of disease biomarkers.

An intrinsically stretchable humidity sensor based on anti-drying, self-healing and transparent organohydrogels

2019 ◽  
Vol 6 (3) ◽  
pp. 595-603 ◽  
Author(s):  
Jin Wu ◽  
Zixuan Wu ◽  
Huihua Xu ◽  
Qian Wu ◽  
Chuan Liu ◽  
...  
Keyword(s):  
Humidity Sensor ◽  
Self Healing ◽  
Solvent Exchange ◽  
Humidity Sensing ◽  
Sensing Applications

A facile solvent-exchange strategy is devised to fabricate anti-drying, self-healing and transparent organohydrogels for stretchable humidity sensing applications.

scholarly journals Bioinspired modified graphene oxide/polyurethane composites with rapid self-healing performance and excellent mechanical properties

RSC Advances ◽  
2021 ◽  
Vol 11 (24) ◽  
pp. 14665-14677
Author(s):  
Yahao Liu ◽  
Jian Zheng ◽  
Xiao Zhang ◽  
Yongqiang Du ◽  
Guibo Yu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Molecular Design ◽  
Self Healing ◽  
Modified Graphene Oxide ◽  
Rational Molecular Design ◽  
Mechanical Performances ◽  
Modified Graphene ◽  
Polyurethane Composites ◽  
Hyperbranched Polyamide

We successfully modified graphene oxide with amino-terminated hyperbranched polyamide(MGO), and obtained novel mussel-inspired MGO/polyurethane composites with outstanding self-healing and mechanical performances via rational molecular design.

Structural evaluation of percolating, self-healing polyurethane–polycaprolactone blends doped with metallic, ferromagnetic, and modified graphene fillers

2020 ◽  
pp. 096739112092382
Author(s):  
D Wlodarczyk ◽  
I Zmuda-Trzebiatowska ◽  
J Karczewski ◽  
M Lubinska-Szczygel ◽  
M Urban ◽  
...  
Keyword(s):  
Structural Changes ◽  
Organic Coating ◽  
Spectroscopic Techniques ◽  
Self Healing ◽  
Metallic Structures ◽  
Structural Evaluation ◽  
Strategic Value ◽  
Reduced Graphene ◽  
Modified Graphene ◽  
Conductive Properties

Composites with differently shaped micro- and nanofillers show various, unique thermal, and physicochemical properties when mixed with carefully chosen polymer matrix. Selected composition holds strategic value in achieving desired properties that is biodegradability, thermoelectric conductivity, and shape memory for organic coating. The main aim of this work is to briefly examine structural changes after reaching percolation threshold and activating healing abilities within exploited (8–2 wt ratio) polyurethane–polycaprolactone thin films mixed up with different types of metallic and ferromagnetic microfillers. They, with applicable dosages of reduced graphene oxide nanoparticles, should enhance materials’ mechanical and conductive properties. Microscopic and spectroscopic techniques accompanied by extensive thermal analysis have been chosen to provide useful information about local changes in surface structure and morphology. Moreover, pristine, percolating surface with inner-formed, metallic structures shows moderate conducting properties within exploited materials which unfortunately diminish after thermal healing stimulus is being applied. This statement is supported by observing the coverage of regional defects and nearby pores with a concise, uniform layer of blend having different PU:PCL ratio. Including the additional fact that apparent filler migration is changing local dopant composition brings up an assumption that both phenomena have negative synergy effect on each other.

Effect of Ionic liquid modified Graphene Oxide on Mechanical and Self-Healing application of an Ionic Elastomer

2021 ◽  
pp. 110691
Author(s):  
Mithun Das ◽  
Aswathy T. R ◽  
Sanjay Pal ◽  
Kinsuk Naskar
Keyword(s):  
Ionic Liquid ◽  
Graphene Oxide ◽  
Self Healing ◽  
Modified Graphene Oxide ◽  
Modified Graphene

scholarly journals Improvement of Mechanical and Self-Healing Properties for Polymethacrylate Derivatives Containing Maleimide Modified Graphene Oxide

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 603 ◽  
Author(s):  
Won-Ji Lee ◽  
Sang-Ho Cha
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Alder Reaction ◽  
Diels Alder ◽  
The Self ◽  
Self Healing ◽  
Diels Alder Reaction ◽  
Healing Efficiency ◽  
Modified Graphene Oxide ◽  
Modified Graphene

In this paper, a self-healable nanocomposite based on the Diels-Alder reaction is developed. A graphene-based nanofiller is introduced to improve the self-healing efficiency, as well as the mechanical properties of the nanocomposite. Graphene oxide (GO) is modified with maleimide functional groups, and the maleimide-modified GO (mGO) enhanced the compatibility of the polymer matrix and nanofiller. The tensile strength of the nanocomposite containing 0.030 wt% mGO is improved by 172%, compared to that of a polymer film incorporating both furan-functionalized polymer and bismaleimide without any nanofiller. Moreover, maleimide groups of the surface on mGO participate in the Diels-Alder reaction, which improves the self-healing efficiency. The mechanical and self-healing properties are significantly improved by using a small amount of mGO.

scholarly journals A Review of Inkjet Printed Graphene and Carbon Nanotubes Based Gas Sensors

Sensors ◽  
2020 ◽  
Vol 20 (19) ◽  
pp. 5642 ◽  
Author(s):  
Twinkle Pandhi ◽  
Ashita Chandnani ◽  
Harish Subbaraman ◽  
David Estrada
Keyword(s):  
Flexible Electronics ◽  
Inkjet Printing ◽  
Gas Sensing ◽  
Ambient Conditions ◽  
Sensing Applications ◽  
Recent Developments ◽  
Vapor Sensors ◽  
Multiwall Nanotubes ◽  
Modified Graphene ◽  
Single Wall Nanotubes

Graphene and carbon nanotube (CNT)-based gas/vapor sensors have gained much traction for numerous applications over the last decade due to their excellent sensing performance at ambient conditions. Inkjet printing various forms of graphene (reduced graphene oxide or modified graphene) and CNT (single-wall nanotubes (SWNTs) or multiwall nanotubes (MWNTs)) nanomaterials allows fabrication onto flexible substrates which enable gas sensing applications in flexible electronics. This review focuses on their recent developments and provides an overview of the state-of-the-art in inkjet printing of graphene and CNT based sensors targeting gases, such as NO2, Cl2, CO2, NH3, and organic vapors. Moreover, this review presents the current enhancements and challenges of printing CNT and graphene-based gas/vapor sensors, the role of defects, and advanced printing techniques using these nanomaterials, while highlighting challenges in reliability and reproducibility. The future potential and outlook of this rapidly growing research are analyzed as well.

Chemically modified graphene and nitrogen-doped graphene: Electrochemical characterisation and sensing applications

2013 ◽  
Vol 114 ◽  
pp. 533-542 ◽  
Author(s):  
Krishna P. Prathish ◽  
Madalina M. Barsan ◽  
Dongsheng Geng ◽  
Xueliang Sun ◽  
Christopher M.A. Brett
Keyword(s):  
Nitrogen Doped ◽  
Chemically Modified ◽  
Sensing Applications ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Modified Graphene ◽  
Electrochemical Characterisation
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