Max Grell

Max Grell
Imperial College London | Imperial · Department of Bioengineering

https://www.linkedin.com/in/maxgrell/

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15
Publications
2,667
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154
Citations

Publications

Publications (15)
Article
Full-text available
Overfertilization with nitrogen fertilizers has damaged the environment and health of soil, but standard laboratory testing of soil to determine the levels of nitrogen (mainly NH4⁺ and NO3⁻) is not performed regularly. Here we demonstrate that point-of-use measurements of NH4⁺, combined with soil conductivity, pH, easily accessible weather and timi...
Article
Full-text available
Rapid screening and low-cost diagnosis play a crucial role in choosing the correct course of intervention when dealing with highly infectious pathogens. This is especially important if the disease-causing agent has no effective treatment, such as the novel coronavirus SARS-CoV-2, and shows no or similar symptoms to other common infections. Here, we...
Preprint
Full-text available
Overfertilization with nitrogen fertilizers has damaged the environment and health of soil; yields are declining, while the population continues to rise. Soil is a complex, living organism which is constantly evolving, physically, chemically and biologically. Standard laboratory testing of soil to determine the levels of nitrogen (mainly NH 4 ⁺ and...
Article
Full-text available
The dependence of charge carrier mobility on semiconductor channel thickness in field‐effect transistors is a universal phenomenon that has been studied extensively for various families of materials. Surprisingly, analogous studies involving metal oxide semiconductors are relatively scarce. Here, spray‐deposited In2O3 layers are employed as the mod...
Preprint
Full-text available
Rapid screening and low-cost diagnosis play a crucial role in choosing the correct course of intervention e.g., drug therapy, quarantine, no action etc. when dealing with highly infectious pathogens. This is especially important if the disease-causing agent has no effective treatment, such as the novel coronavirus SARS-CoV-2 (the pathogen causing C...
Article
Full-text available
We report a method of creating solderable, mechanically robust, electrical contacts to interface (soft) silicone-based strain sensors with conventional (hard) solid-state electronics using a nanoporous Si-Cu composite. The Si-based solder-on electrical contact consists of a copper-plated nanoporous Si top surface formed through metal-assisted chemi...
Preprint
We report a method of creating solderable, mechanically robust, electrical contacts to interface (soft) silicone-based strain sensors with conventional (hard) solid-state electronics using a nanoporous Si-Cu composite. The Si-based solder-on electrical contact consists of a copper-plated nanoporous Si top surface formed through metal-assisted chemi...
Article
Full-text available
We report an entirely new class of printed electrical gas sensors that are produced at near ‘zero cost’. This technology exploits the intrinsic hygroscopic properties of cellulose fibers within paper; although it feels and looks dry, paper contains substantial amount of moisture, adsorbed from the environment, enabling the use of wet chemical metho...
Article
Full-text available
Commercially available metal inks are mainly designed for planar substrates (for example, polyethylene terephthalate foils or ceramics), and they contain hydrophobic polymer binders that fill the pores in fabrics when printed, thus resulting in hydrophobic electrodes. Here, a low‐cost binder‐free method for the metallization of woven and nonwoven f...
Cover Page
Full-text available
In article number 1804798, Max Grell, Firat Guder, and co‐workers describe a method for depositing a wide range of metals inside fabrics which they call Si ink‐enabled autocatalytic metallization. Without requiring surface modification, the method provides access to devices as diverse as antennas, batteries, biosensors, or Raman spectroscopy substr...
Article
The growth mechanism of indium oxide (In2O3) layers processed via spray pyrolysis of an aqueous precursor solution in the temperature range of 100–300 °C and the impact on their electron transporting properties are studied. Analysis of the droplet impingement sites on the substrate's surface as a function of its temperature reveals that Leidenfrost...

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