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Full-Text Articles in Engineering
Nanoimprint Lithography 20 Years On, Qiangfei Xia, R. Fabian Pease
Nanoimprint Lithography 20 Years On, Qiangfei Xia, R. Fabian Pease
Qiangfei Xia
To celebrate the 20th anniversary of nanoimprint lithography (NIL) we present a perspective of how the technique and its prospects have evolved over the past two decades. We describe how it overcame certain fabrication challenges at the time it was first reported and look at some of the obstacles that hindered uptake in industry initially, as well as likely sectors for future successful commercial deployment. Developments in the technique since that are making NIL increasingly attractive such as 'moving roll to roll' for higher throughput, are also described.
Nanoscale Memristive Radiofrequency Switches, Shuang Pi, Mohammad Ghadiri-Sadrabadi, Joseph C. Bardin, Qiangfei Xia
Nanoscale Memristive Radiofrequency Switches, Shuang Pi, Mohammad Ghadiri-Sadrabadi, Joseph C. Bardin, Qiangfei Xia
Qiangfei Xia
Radiofrequency switches are critical components in wireless communication systems and consumer electronics. Emerging devices include switches based on microelectromechanical systems and phase-change materials. However, these devices suffer from disadvantages such as large physical dimensions and high actuation voltages. Here we propose and demonstrate a nanoscale radiofrequency switch based on a memristive device. The device can be programmed with a voltage as low as 0.4 V and has an ON/OFF conductance ratio up to 1012 with long state retention. We measure the radiofrequency performance of the switch up to 110 GHz and demonstrate low insertion loss (0.3 dB at 40 GHz), …