functionalized graphene
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2022 ◽  
Vol 177 ◽  
pp. 114478
Author(s):  
Jiongjiong Li ◽  
Fudong Zhang ◽  
Yan Lyu ◽  
Shuaicheng Jiang ◽  
Xiaona Li ◽  
...  

Fuel ◽  
2022 ◽  
Vol 313 ◽  
pp. 122987
Author(s):  
Anna Malaika ◽  
Karolina Ptaszyńska ◽  
Justina Gaidukevič ◽  
Mieczysław Kozłowski

Author(s):  
Sejal P. Dalal ◽  
Kandarp Desai ◽  
Dhairya Shah ◽  
Sanjay Prajapati ◽  
Purvang Dalal ◽  
...  

2022 ◽  
Vol 12 (2) ◽  
pp. 863
Author(s):  
Mounia Chakik ◽  
Siziwe Bebe ◽  
Ravi Prakash

Corrosion monitoring and management has been at the center of structural health monitoring protocols due to its damaging effects on metallic structures. Current corrosion prevention and management programs often fail to include environmental factors such as Cl− ions and surface wetness. Early detection of these environmental factors can prevent the onset of corrosion and reduce repair and maintenance-related expenses. There is growing interest in creating solution-processed thin film environmental sensors with high sensitivity to corrosion precursors, low-cost fabrication, and small footprint, rendering them viable candidates for investigation as potential corrosion sensors that could be easily integrated into existing structures and screen printed or patterned directly into surface coatings. In this work, we have implemented C60-based n-type organic thin film transistors (OTFTs) with functionalized graphene oxide for humidity sensing and functionalized graphene nanoparticles for Cl− ion detection, using low-cost solution processing techniques. The reduced graphene oxide (rGO)-coated OTFT humidity sensor is designed for the qualitative estimation of surface moisture levels and high levels of humidity, and it exhibits a relative responsivity for dry to surface wetness transition of 122.6% to surface wetness, within a response time of 20 ms. We furthermore implemented an in-house synthesized hydrogenated graphene coating in conjunction with a second OTFT architecture for Cl− ions sensing which yielded a sensitivity of 4%/ppm to ultrafine ionic concentrations, over an order of magnitude lower than the range identified to cause corrosion in aircraft structures.


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