Fabrication of ZrO2 layer through electrohydrodynamic atomization for the printed resistive switch (memristor)

Awais, Muhammad Naeem; Nauman, Malik Muhammad; Duraisamy, Navaneethan; Kim, Hyung Chan; Jo, Jeongdai; Choi, Kyung Hyun

doi:10.1016/j.mee.2012.09.005

Cited by 51 publications

(23 citation statements)

References 24 publications

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“…13 In order to decrease the contact resistance from the formation of an adsorbate film between Pt/Ir conductive tip and the ZrO 2 array dot, a Pt layer was covered on the whole ZrO 2 array by sputtering. Figure 4d is a local I -V curve which is also measured while the C-AFM image was scanning.…”

Section: Influence On a Pt Layer By C-afm Measurement Systemsmentioning

confidence: 99%

Study of influence on micro-fabricated resistive switching organic ZrO2 array by C-AFM measurement

Zhao

Kou

et al. 2015

Bull Mater Sci

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In this paper, a comparison of the interfacial electronic properties between Pt/Ir conductive atomic force microscopy (C-AFM) tip and ZrO 2 organic array was carried out. A uniformed ZrO 2 array was fabricated with a mean diameter of around 1 μm using laser interference lithography. A C-AFM measurement set-up was built up. The I-V curve was directly measured of the organic ZrO 2 array which shows a resistive switching characteristic by C-AFM measurement. The set voltage is 18.0 V and the reset voltage is −5.0 V. After the Pt layer was coated on the ZrO 2 array, the set voltage decreases to 0.8 V and the reset voltage decreases to −2.2 V. This result shows that Pt layer can prevent the potential drop effectively. The electron barrier height between Pt/Ir C-AFM tip and organic ZrO 2 array was enhanced by sputtering Pt layer on the ZrO 2 organic array.

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Section: Influence On a Pt Layer By C-afm Measurement Systemsmentioning

confidence: 99%

Study of influence on micro-fabricated resistive switching organic ZrO2 array by C-AFM measurement

Zhao

Kou

et al. 2015

Bull Mater Sci

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“…Piezoelectric injection and atomization devices are widely applied in inhalation therapy [1], dust collection [2], preparation of microcapsule [3], printed circuits [4], precise surface coating [5], 3D prototyping [6], spray drying [7], spray cooling [8], inkjet printing [9], and many other fields. Specifically, the micron-sized droplet technique, with the characteristics of stable injection and full dispersion, constitutes an important development direction in these fields [10].…”

Section: Introductionmentioning

confidence: 99%

Study on the Influencing Factors of the Atomization Rate in a Piezoceramic Vibrating Mesh Atomizer

2020

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On the basis of previous study in our research group, the phenomenon of the dynamic tapered angle was founded, the occurrence of atomization is regarded to derive from the combined effects of the dynamic variation of the micro-tapered aperture, and the difference between forward and reverse flow resistance has been explained by both theories and experiments. It has been revealed that the main influencing factors of the atomization rate are driving voltage, driving frequency, and so on, while the root causes of the various atomization rates still need to be further clarified. In this paper, a micro-tapered aperture worked as a micron-sized tapered flow tube valveless piezoelectric pump in periodic variation. The working principle of such a micro-tapered aperture atomizer was analyzed in detail, and the corresponding formula of the atomization rate was also established. Through measuring the atomization rates at different working frequencies (f), it was established that when the f was set as 122 kHz, the atomization rate reached a maximum value. By building the relationship between the atomization rate and voltage at a fixed resonance frequency, it can be seen that the atomization rate increased with the increase of driving voltage. Subsequently, in order to measure their atomization rates, the micro-tapered apertures of three different outlet diameters were applied, so that the atomization rate was enhanced with the increase of the micro-tapered aperture diameter. Moreover, through examining the atomization rates at different temperatures, it was observed that the atomization rate rose with increasing temperature; while changing the liquid concentration, the atomization rate was also enhanced by the increase in its concentration. Apparently, the impact factors including working frequency, driving voltage, outlet diameter, temperature, and liquid concentration all exert some effects on the atomization rate. It is worth noting that at the first stage, these influence factors indirectly work on the micro-tapered aperture structure or flow state, followed by further effects on the flow resistance. As above-mentioned, in this work, we considered that the root cause influencing the atomization rate in a piezoceramic vibrating mesh atomizer can be attributed to the flow resistance.

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“…Traditional atomization and ejection devices driven by pneumatic air or ultrasound are widely used in various processes, including inhalation therapy [ 1 , 2 , 3 ], spray drying [ 4 ], mass spectrometry [ 5 ], printed circuits [ 6 ], 3D prototyping [ 7 ], and precise surface coating [ 8 , 9 ]. The development of finer droplets and smaller devices has emerged as the latest trend in atomization and ejection technology, as illustrated by the ultrasonic atomizers developed by Yabe et al [ 10 ] and Fu et al [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Vibration Characteristics on the Atomization Rate in a Micro-Tapered Aperture Atomizer

Yan

Zhang

Huang

et al. 2018

Sensors

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Because little is known about the atomization theory of a micro-tapered aperture atomizer, we investigated the vibration characteristics of this type of atomizer. The atomization mechanism of a micro-tapered aperture atomizer was described, and the atomization rate equation was deduced. As observed via microscopy, the angle of the micro-tapered aperture changes with the applied voltage, which proved the existence of a dynamic cone angle. The forward and reverse atomization rates were measured at various voltages, and the influence of the micro-tapered aperture and its variation on the atomization rate was characterized. The resonance frequency of the piezoelectric vibrator was obtained using a laser vibrometer, and the atomization rates were measured at each resonance frequency. From experiments, we found that the atomization rates at the first five resonance frequencies increased as the working frequency increased. At the fifth resonance frequency (121.1 kHz), the atomization rate was maximized (0.561 mL/min), and at the sixth resonance frequency (148.3 kHz), the atomization rate decreased significantly (0.198 mL/min). The experimental results show that the vibration characteristics of the piezoelectric vibrator have a relatively strong impact on the atomization rate. This research is expected to contribute to the manufacture of micro-tapered aperture atomizers.

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Fabrication of ZrO2 layer through electrohydrodynamic atomization for the printed resistive switch (memristor)

Cited by 51 publications

References 24 publications

Study of influence on micro-fabricated resistive switching organic ZrO2 array by C-AFM measurement

Study of influence on micro-fabricated resistive switching organic ZrO2 array by C-AFM measurement

Study on the Influencing Factors of the Atomization Rate in a Piezoceramic Vibrating Mesh Atomizer

The Effect of Vibration Characteristics on the Atomization Rate in a Micro-Tapered Aperture Atomizer

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