Electric field-induced rearrangement of charged species in metal oxide devices with resistive change: thermodynamic limitations

Kiselev, I.; Sommer, Martin; Sysoev, Victor V.

doi:10.1140/epjb/e2011-20176-0

Cited by 4 publications

(6 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Under dark or UV conditions, a time-dependent drift in resistance was observed, even under bias of 100 mV across the ZnO. The possible mechanism behind this phenomenon is electric field-induced ion migration, and the aggregation of ionized adsorbates toward the anode or cathode, and from photocatalytic desorption of oxygen from the ZnO lattice 30 , 31 .…”

Section: Resultsmentioning

confidence: 99%

UV-activated ZnO films on a flexible substrate for room temperature O2 and H2O sensing

Jacobs¹,

Maksov²,

Muckley³

et al. 2017

Sci Rep

View full text Add to dashboard Cite

We demonstrate that UV-light activation of polycrystalline ZnO films on flexible polyimide (Kapton) substrates can be used to detect and differentiate between environmental changes in oxygen and water vapor. The in-plane resistive and impedance properties of ZnO films, fabricated from bacteria-derived ZnS nanoparticles, exhibit unique resistive and capacitive responses to changes in O2 and H2O. We propose that the distinctive responses to O2 and H2O adsorption on ZnO could be utilized to statistically discriminate between the two analytes. Molecular dynamic simulations (MD) of O2 and H2O adsorption energy on ZnO surfaces were performed using the large-scale Atomic/Molecular Massively Parallel Simulator (LAMMPS) with a reactive force-field (ReaxFF). These simulations suggest that the adsorption mechanisms differ for O2 and H2O adsorption on ZnO, and are governed by the surface termination and the extent of surface hydroxylation. Electrical response measurements, using DC resistance, AC impedance spectroscopy, and Kelvin Probe Force Microscopy (KPFM), demonstrate differences in response to O2 and H2O, confirming that different adsorption mechanisms are involved. Statistical and machine learning approaches were applied to demonstrate that by integrating the electrical and kinetic responses the flexible ZnO sensor can be used for detection and discrimination between O2 and H2O at low temperature.

show abstract

Section: Resultsmentioning

confidence: 99%

UV-activated ZnO films on a flexible substrate for room temperature O2 and H2O sensing

Jacobs¹,

Maksov²,

Muckley³

et al. 2017

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Therefore, the primary short-term drift of the sensor resistance is not observed in the saved data. However, the mid-term drift of the sensor resistance, which is often related to a diffusion of vacancies in metal oxides [ 17 , 44 , 45 ], has been ascertained as shown for example in Figure 10 (It is worth noting that the cogged character of the sensor array profile is not essential to be accounted for in the present study though it is rather characteristic for the metal oxide multisensor array chips. It appears during a long e-nose operation period, due to oxygen ion migration [ 45 , 46 ]).…”

Section: Experiments Results and Discussionmentioning

confidence: 99%

On the Temporal Stability of Analyte Recognition with an E-Nose Based on a Metal Oxide Sensor Array in Practical Applications

Kiselev

Sysoev

Kaikov

et al. 2018

Sensors

View full text Add to dashboard Cite

The paper deals with a functional instability of electronic nose (e-nose) units which significantly limits their real-life applications. Here we demonstrate how to approach this issue with example of an e-nose based on a metal oxide sensor array developed at the Karlsruhe Institute of Technology (Germany). We consider the instability of e-nose operation at different time scales ranging from minutes to many years. To test the e-nose we employ open-air and headspace sampling of analyte odors. The multivariate recognition algorithm to process the multisensor array signals is based on the linear discriminant analysis method. Accounting for the received results, we argue that the stability of device operation is mostly affected by accidental changes in the ambient air composition. To overcome instabilities, we introduce the add-training procedure which is found to successfully manage both the temporal changes of ambient and the drift of multisensor array properties, even long-term. The method can be easily implemented in practical applications of e-noses and improve prospects for device marketing.

show abstract

“…Figure 12b schematically shows a sample with two lateral electrodes and distribution of surface OH − groups during the bias-on (polarization (P)) and bias-off (relaxation (R)) steps of the experiment. The surface ionic transport, known since Shockley's time, 154 is important for many devices, determining the operation of conductometric gas sensors, 155 electrocatalysts, and affecting the polarization switching in ferroelectric memory devices. 156 Unlike amperometric techniques that are limited by the sensitivity of the current amplifier, tr-KPFM can probe minuscule charge flows, even on insulating surfaces.…”

Section: Potential Detectionmentioning

confidence: 99%

“…A full quantitative analysis approach would require solving the inverse problem by converting the CPD maps into maps of local charge distributions, rates of electrochemical reactions, or ionic mobilities. This challenging problem was partially solved (in one dimension) in early KPFM studies of semiconducting devices 158−160 and multielectrode gas sensor systems, 155 and has become an integral part of the so-called energy discovery platform (EDP) approach. 157,161,162 The EDP approach seeks to unravel the surface electrochemistry and ionic transport in the studied system through a synergistic combination of sample microfabrication, tr-KPFM, and numerical modeling.…”

Section: Potential Detectionmentioning

confidence: 99%

Toward Electrochemical Studies on the Nanometer and Atomic Scales: Progress, Challenges, and Opportunities

et al. 2019

View full text Add to dashboard Cite

Electrochemical reactions and ionic transport underpin the operation of a broad range of devices and applications, from energy storage and conversion to information technologies, as well as biochemical processes, artificial muscles, and soft actuators. Understanding the mechanisms governing function of these applications requires probing local electrochemical phenomena on the relevant time and length scales. Here, we discuss the challenges and opportunities for extending electrochemical characterization probes to the nanometer and ultimately atomic scales, including challenges in down-scaling classical methods, the emergence of novel probes enabled by nanotechnology and based on emergent physics and chemistry of nanoscale systems, and the integration of local data into macroscopic models. Scanning probe microscopy (SPM) methods based on strain detection, potential detection, and hysteretic current measurements are discussed. We further compare SPM to electron beam probes and discuss the applicability of electron beam methods to probe local electrochemical behavior on the mesoscopic and atomic levels. Similar to a SPM tip, the electron beam can be used both for observing behavior and as an active electrode to induce reactions. We briefly discuss new challenges and opportunities for conducting fundamental scientific studies, matter patterning, and atomic manipulation arising in this context.

show abstract

Electric field-induced rearrangement of charged species in metal oxide devices with resistive change: thermodynamic limitations

Cited by 4 publications

References 19 publications

UV-activated ZnO films on a flexible substrate for room temperature O2 and H2O sensing

UV-activated ZnO films on a flexible substrate for room temperature O2 and H2O sensing

On the Temporal Stability of Analyte Recognition with an E-Nose Based on a Metal Oxide Sensor Array in Practical Applications

Toward Electrochemical Studies on the Nanometer and Atomic Scales: Progress, Challenges, and Opportunities

Contact Info

Product

Resources

About