We address the modelling of tip-cell membrane interactions under high speed atomic force microscopy. Using a home-made device with a scanning area of 100 × 100 μm(2), in situ imaging of living cells ...is successfully performed under loading rates from 1 to 50 Hz, intending to enable detailed descriptions of physiological processes in living samples.
In recent years, X‐ray detectors have been widely applied in industrial non‐destructive testing, medical diagnostics, scientific research, and so on. CsPbX3 has become a dazzling star material ...because of its high X‐ray absorption coefficient, low trap density, long carrier diffusion length, and other excellent photoelectric characteristics. This review first presents the crystal structure of CsPbX3 and then systematically introduces three single crystal growth methods and two quantum dot synthesis methods. Next, the research progress of X‐ray detection is introduced for different material types and detector types. Finally, the challenges and development prospects of CsPbX3 are discussed.
Abstract
In recent years, X‐ray detectors have been widely applied in industrial non‐destructive testing, medical diagnostics, scientific research, and so on. CsPbX
3
has become a dazzling star ...material because of its high X‐ray absorption coefficient, low trap density, long carrier diffusion length, and other excellent photoelectric characteristics. This review first presents the crystal structure of CsPbX
3
and then systematically introduces three single crystal growth methods and two quantum dot synthesis methods. Next, the research progress of X‐ray detection is introduced for different material types and detector types. Finally, the challenges and development prospects of CsPbX
3
are discussed.
In order to achieve large scanning range, this article presents a new type high-speed AFM system. According to the need of rapid data transmission and operation, the AFM control system structure was ...composed of PC104 and DSP hardware model. Because of using a large displacement flexure stage as the sample stage, this AFM system is capable of providing a scan range of 100×100um image with 50Hz line-scan speed. The capacitor displacement sensors are used as x-y position during AFM scan image. We realized a new scanning method based on positioning control. The scanning images are more precision and less distortion than general open-loop x-y scanning image.
In this paper, scanning parameters optimization (SPO), a new method for parameters tuning of digital proportional-integral (PI) controller is proposed. It can automatically search for the optimal ...parameter group which contains both proportional action coefficient and integral action coefficient that fits the user's design from a set of candidate groups by scanning their performance indices, such as rise time, overshot and steady state error. Satisfactory degree function (SDF) and automatic rules generating algorithm (ARGA) are developed within this method to make the three indices which have different dimensions mapped into a cost function. With grain analysis algorithm (GAA) we can get the optimal parameter group last. The major two advantages of this method are that it can present an overview of the parameter groups without knowing the plant model of the target system and provide a result of overall optimization. Its application in the control system of atomic force microscopy (AFM) in our lab shows that it is practical and has excellent performance.
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