Block copolymer nanolithography has been extended to the nanopatterning of organic functionalities on pyrolyzed photoresist carbon films (PPFs) via diazonium chemistry, using PS-b-P4VP as the template.
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http://dx.doi.org/10.1039/c2cc35010f | DOI Listing |
Electroanalysis
December 2022
Ralph N. Adams Institute for Bioanalytical Chemistry, University of Kansas, Lawrence, KS, USA.
A method for the determination of selected aromatic amino acid biomarkers of oxidative stress using microchip electrophoresis with electrochemical detection is described. The separation of the major reaction products of phenylalanine and tyrosine with reactive nitrogen and oxygen species was accomplished using ligand exchange micellar electrokinetic chromatography with a PDMS/glass hybrid chip. Electrochemical detection was achieved using a pyrolyzed photoresist film working electrode.
View Article and Find Full Text PDFACS Appl Mater Interfaces
June 2022
Department of Electrical & Computer Engineering, Iowa State University, Ames, Iowa 50011, United States.
Nitrogen management through monitoring of crop nitrate status can improve agricultural productivity, profitability, and environmental performance. Current plant nitrate test methods require expensive instruments, time-intensive labor, and trained personnel. Frequent monitoring of nitrate levels of the stalks in living plants can help to better understand the nitrogen cycle and the physiological responses to environmental variations.
View Article and Find Full Text PDFMicrosyst Nanoeng
February 2022
Microsystems Laboratory, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
Glass-like carbon (GC) is a nongraphitizing material composed entirely of carbon atoms produced from selected organic polymer resins by controlled pyrolysis in an inert atmosphere. The GC properties are a combination of the properties of glass, ceramic, and graphite, including hardness, low density, low thermal conductivity, high chemical inertness, biocompatibility, high electrical conductivity, and microfabrication process compatibility. Despite these unique properties, the application of GC in mechanical sensors has not been explored thus far.
View Article and Find Full Text PDFNanomaterials (Basel)
October 2021
Nano-Convergence Mechanical Systems Research Division, Korea Institute of Machinery and Materials, 156, Gajeongbuk-Ro, Yuseong-Gu, Daejeon 34103, Korea.
We report a laser-pyrolyzed carbon (LPC) electrode prepared from a black photoresist for an on-chip microsupercapacitor (MSC). An interdigitated LPC electrode was fabricated by direct laser writing using a high-power carbon dioxide (CO) laser to simultaneously carbonize and pattern a spin-coated black SU-8 film. Due to the high absorption of carbon blacks in black SU-8, the laser-irradiated SU-8 surface was directly exfoliated and carbonized by a fast photo-thermal reaction.
View Article and Find Full Text PDFNanotechnology
November 2021
Department of Physics and Mathematics, Institute of Photonics, University of Eastern Finland, Joensuu, Finland.
In this paper we propose an original approach for the real-time detection of industrial organic pollutants in water. It is based on the monitoring of the time evolution of the electrical impedance of low-cost graphitic nanomembranes. The developed approach exploits the high sensitivity of the impedance of 2D graphene-related materials to the adsorbents.
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