tailieunhanh - Báo cáo hóa học: " Friction-induced nanofabrication method to produce protrusive nanostructures on quartz"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Friction-induced nanofabrication method to produce protrusive nanostructures on quartz | Song et al. Nanoscale Research Letters 2011 6 310 http content 6 1 310 o Nanoscale Research Letters a SpringerOpen Journal NANO EXPRESS Open Access Friction-induced nanofabrication method to produce protrusive nanostructures on quartz Chenfei Song 1 Xiaoying Li2 Bingjun Yu1 Hanshan Dong2 Linmao Qian1 and Zhongrong Zhou1 Abstract In this paper a new friction-induced nanofabrication method is presented to fabricate protrusive nanostructures on quartz surfaces through scratching a diamond tip under given normal loads. The nanostructures such as nanodots nanolines surface mesas and nanowords can be produced on the target surface by programming the tip traces according to the demanded patterns. The height of these nanostructures increases with the increase of the number of scratching cycles or the normal load. Transmission electron microscope observations indicated that the lattice distortion and dislocations induced by the mechanical interaction may have played a dominating role in the formation of the protrusive nanostructures on quartz surfaces. Further analysis reveals that during scratching a contact pressure ranged from to Py Py is the critical yield pressure of quartz is apt to produce protuberant nanostructures on quartz under the given experimental conditions. Finally it is of great interest to find that the protrusive nanostructures can be selectively dissolved in 20 KOH solution. Since the nanowords can be easily written by friction-induced fabrication and erased through selective etching on a quartz surface this friction-induced method opens up new opportunities for future nanofabrication. Introduction Due to its high fundamental frequencies high Q property and excellent piezoelectric behaviour quartz has been widely used to produce sensors in micro nano electromechanical systems MEMS NEMS such as accelerometer pressure sensor gyro sensor crystal oscillator and tuning fork biosensor etc. 1-5 . Moreover quartz is also an ideal .