Srivatsa Shreyas, Belthangadi Pavithra, Ekambaram Shivakarthik, Pai Manu, Sen Prosenjit, Uhl Tadeusz, Kumar Saurabh, Grabowski Krzysztof, Nayak M M
Academic Center for Materials and Nanotechnology (ACMiN), AGH University of Science and Technology (UST) Krakow Poland
Centre for Nano Science and Engineering (CeNSE), Indian Institute of Science (IISc) Bangalore India
RSC Adv. 2020 Aug 6;10(49):29147-29155. doi: 10.1039/d0ra04879h. eCollection 2020 Aug 5.
MXenes (Titanium Carbide, TiC-MXene) are two-dimensional nanomaterials that are known for their conductivity, film-forming ability, and elasticity. Though literature reports the possibility of usage of TiC-MXenes for sensor development, the material properties and response need be studied in detail for designing sensors to measure dynamic variables like force, displacement, , in a dynamic environment. TiC-MXenes due to their good electro-mechanical properties can be used for manufacturing sensing elements for engineering and biomedical applications. This paper focuses on an investigation of the dynamic response properties of TiC-MXenes subjected to shockwave and impact forces. A supersonic shockwave (Mach number: 1.68, peak overpressure: 234.3 kPa) produced in a shock tube acts as an external force on the TiC-MXene film placed inside the shock tube. In the experiment performed, the response time of the TiC-MXene film sample has been observed to be in the range of few microseconds (∼7 μs) for the high-velocity shock. In a separate experiment, TiC-MXene film samples are subjected to low-velocity impact forces through a ball drop test. The results from the ball drop test provide a response time in the range of few milliseconds (average ∼1.5 ms). In this novel demonstration, the TiC-MXene film sample responds well for both low-velocity mechanical impact as well as high-velocity shockwave impact. Further, the repeatability of the dynamic response of the TiC-MXene film sample is discussed along with its significant piezoresistive behavior. This work provides the basis for sensor development to measure the dynamic phenomena of pressure changes, acoustic emissions, structural vibrations,
MXenes（碳化钛，TiC-MXene）是二维纳米材料，以其导电性、成膜能力和弹性而闻名。尽管文献报道了TiC-MXene用于传感器开发的可能性，但在设计用于测量动态环境中力、位移等动态变量的传感器时，需要详细研究其材料特性和响应。TiC-MXene由于其良好的机电性能，可用于制造工程和生物医学应用的传感元件。本文重点研究了TiC-MXene在冲击波和冲击力作用下的动态响应特性。在激波管中产生的超音速冲击波（马赫数：1.68，超压峰值：234.3 kPa）对放置在激波管内的TiC-MXene薄膜施加外力。在进行的实验中，观察到TiC-MXene薄膜样品对高速冲击的响应时间在几微秒（约7 μs）范围内。在另一个实验中，通过落球试验对TiC-MXene薄膜样品施加低速冲击力。落球试验的结果提供了几毫秒（平均约1.5 ms）范围内的响应时间。在这个新颖的演示中，TiC-MXene薄膜样品对低速机械冲击和高速冲击波冲击都有良好的响应。此外，还讨论了TiC-MXene薄膜样品动态响应的重复性及其显著的压阻行为。这项工作为开发用于测量压力变化、声发射、结构振动等动态现象的传感器提供了基础。
