Anton Köck
YOU?
Author Swipe
Investigation of Gas Sensing Performance of CuO/Cu2O Thin Films as a Function of Au-NP Size for CO, CO2, and Hydrocarbons Mixtures Open
This study examines the impact of Au nanoparticles (Au-NPs) on the chemoresistive gas sensing properties as a function of particle size. The sensing material is composed of ultrathin CuO/Cu2O films, which are fabricated by either thermal d…
Investigation of the gas-sensing performance of CuO sensors functionalized with different stabilized Au nanoparticles Open
In this work, which was presented at the Eurosensors 2024 conference (Maier et al., 2024a), we present the development of chemoresistive nanosensors based on ultrathin CuO/Cu2O films, fabricated through a two-step process involving thermal…
Investigation of the Influence of Adhesion Layers on the Gas Sensing Performance of CuO/Cu2O Thin Films Open
This parameter study examines the impact of two distinct adhesion layers, chromium (Cr) and titanium (Ti), on the performance of CuO/Cu2O-based chemoresistive gas sensors by varying the layer thickness. The sensing material utilised on a S…
SnO2-Based CMOS-Integrated Gas Sensor Optimized by Mono-, Bi-, and Trimetallic Nanoparticles Open
Chemical sensors, relying on electrical conductance changes in a gas-sensitive material due to the surrounding gas, have the (dis-)advantage of reacting with multiple target gases and humidity. In this work, we report CMOS-integrated SnO2 …
Development of a Screening Platform for Optimizing Chemical Nanosensor Materials Open
Chemical sensors, relying on changes in the electrical conductance of a gas-sensitive material due to the surrounding gas, typically react with multiple target gases and the resulting response is not specific for a certain analyte species.…
A Review of Gas Sensors for CO2 Based on Copper Oxides and Their Derivatives Open
Buildings worldwide are becoming more thermally insulated, and air circulation is being reduced to a minimum. As a result, measuring indoor air quality is important to prevent harmful concentrations of various gases that can lead to safety…
Size-Dependent Thresholds in CuO Nanowires: Investigation of Growth from Microstructured Thin Films for Gas Sensing Open
An experimental characterization of cupric oxide nanowire (CuO NW) growth from thermally oxidized, microstructured Cu thin films is performed. We have systematically studied the influence of the thickness and dimension of Cu layers on the …
Using Mono-, Bi- and Tri-Metallic Nanoparticles to Improve Selectivity and Sensitivity of CMOS-Integrated SnO2 Thin-Film Gas Sensors Open
We demonstrate the systematic optimization of SnO2-based thin-film chemical sensors by using mono-, bi- and tri metallic nanoparticles (NPs) composed of Ag, Pd, and Ru, which are deposited via magnetron sputtering inert gas condensation. T…
Pulsed Temperature Operation of SnO2-Based Gas Sensors Open
We herein demonstrate the pulsed-mode temperature operation of chemical sensor devices based on thin SnO2 films, which were synthesized by magnetron sputtering. The gas-sensitive films were integrated on SiN-based micro-hotplate (µhp) chip…
Efficient Screening of Hybrid Nanomaterials for Optimizing Chemical Sensor Devices Open
Chemical sensors based on metal oxides (MOx) are one of the most promising gas sensing devices due to their high sensitivity to numerous gases, fast response, miniaturization, and simple production. The detection principle of these sensors…
Optimization of SnO2-Based CMOS-Integrated Gas Sensors by Mono-, Bi- and Trimetallic Nanoparticles Open
In this paper, we report on the optimization of SnO2-based thin film gas sensor devices by mono-, bi- and trimetallic nanoparticles. Ag, AgRu, and AgRuPd nanoparticles are sputter deposited on CMOS-integrated SnO2-thin film gas sensor devi…
Current Perspectives for Autonomous Sensor Nodes Open
The current technological trends associated with Industry 4.0 and the Internet of Things (IoT) require an interconnected network of sensor nodes providing distributed information on the environment to enable intelligent action to be taken …
Atomic-scale structure and chemical sensing application of ultrasmall size-selected Pt nanoparticles supported on SnO<sub>2</sub> Open
SnO2-based chemoresistive sensors integrated in complementary metal-oxide-semiconductor technology were functionalized with ultrasmall Pt nanoparticles, resulting in carbon monoxide sensing properties with minimized humidity interference.
Materials-Related Challenges for Autonomous Sensor Nodes Open
The current technological trends associated with Industry 4.0 and the Internet of Things (IoT) require an interconnected network of sensor nodes providing distributed information on the environment in order to enable intelligent action to …
Transfer Printing Technology as a Straightforward Method to Fabricate Chemical Sensors Based on Tin Dioxide Nanowires Open
Metal oxide multi-nanowire-based chemical gas sensors were manufactured by a fast and simple transfer printing technology. A two-step method employing spray pyrolysis deposition and a thermal annealing process was used for SnO 2 nanowires …
Heterogeneous Integration of Metal Oxides—Towards a CMOS Based Multi Gas Sensor Device Open
A worldwide unique CMOS based chemical sensor device comprising an array of 8 microhotplates (µhps) for a total of 16 chemical sensors has been fabricated (Figure 1). [...]
Exploring Temperature-Modulated Operation Mode of Metal Oxide Gas Sensors for Robust Signal Processing Open
Metal oxide (MOx) gas sensor signals are mainly governed by adsorption and desorption processes of oxygen and its reaction with surrounding gas molecules. Different target gases exhibit different reaction rates leading to characteristic se…
In-Situ Temperature Measurement on CMOS Integrated Micro-Hotplates for Gas Sensing Devices Open
Metal oxide gas sensors generally need to be operated at elevated temperatures, up to and above 400 °C. Following the need for miniaturization of gas sensors and implementation into smart devices such as smartphones or wireless sensor node…
View article: Study of CuO Nanowire Growth on Different Copper Surfaces
Study of CuO Nanowire Growth on Different Copper Surfaces Open
Cupric oxide (CuO) nanowires were produced by thermal oxidation of copper surfaces at temperatures up to 450 °C. Three different surfaces, namely a copper foil as well as evaporation deposited copper and an application relevant sputtered c…
SPM—SEM Investigations of Semiconductor Nanowires for Integrated Metal Oxide Gas Sensors Open
Integration of metal oxide nanowires in metal oxide gas sensors enables a new generation of gas sensor devices, with increased sensitivity and selectivity. For reproducible and stable performance of next generation sensors, the electric pr…
A Novel Device for Functional Evaluation of Gas Sensing Layers Open
Chemical gas sensors are operated at elevated temperatures and the actual temperature has a tremendous influence on sensitivity and selectivity. From that perspective, precise temperature control over the chip is an absolute requirement. N…
CuO Thin Films Functionalized with Gold Nanoparticles for Conductometric Carbon Dioxide Gas Sensing Open
Metal oxides (MOx) are a well-established material for gas sensing. MOx-based gas sensors are sensitive to a wide variety of gases. Furthermore, these materials can be applied for the fabrication of low-cost and -power consumption devices …
Transfer Printing Technology for Fabricating Chemical Sensors Based on Tin Dioxide Nanowires Open
Multi-nanowire based chemical gas sensors were produced employing a fast and simple transfer printing technology. SnO2 nanowires (NWs) were grown by a specific two-step technology including spray pyrolysis deposition and a thermal annealin…
P1SM.5 - Dry transfer print process of SnO2 nanowires for gas sensor manufacturing Open
SnO2 nanowires have been synthesized and implemented on Si-based sensors with gold inter-digital electrode structures (IDES).A dry transfer printing technology employing a PDMS-stamp has been used to fabricate multi-nanowire gas sensing de…
Probing electron beam effects with chemoresistive nanosensors during <i>in situ</i> environmental transmission electron microscopy Open
We report in situ and ex situ fabrication approaches to construct p-type (CuO) and n-type (SnO2) metal oxide nanowire devices for operation inside an environmental transmission electron microscope (TEM). By taking advantage of their chemor…
In situ chemoresistive sensing in the environmental TEM: probing functional devices and their nanoscale morphology Open
In situ transmission electron microscopy provides exciting opportunities to address fundamental questions and technological aspects related to functional nanomaterials, including the structure-property relationships of miniaturized electro…