O
Olli Pitkänen
Researcher at University of Oulu
Publications - 43
Citations - 778
Olli Pitkänen is an academic researcher from University of Oulu. The author has contributed to research in topics: Carbon nanotube & Carbon. The author has an hindex of 12, co-authored 38 publications receiving 516 citations.
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Journal ArticleDOI
Unmodified and multi-walled carbon nanotube modified tetrahedral amorphous carbon (ta-C) films as in vivo sensor materials for sensitive and selective detection of dopamine
Tommi Palomäki,Emilia Peltola,Sami Sainio,Niklas Wester,Olli Pitkänen,Krisztian Kordas,Jari Koskinen,Tomi Laurila +7 more
TL;DR: Modification with MWCNTs resulted in excellent selectivity and all three analytes could be detected simultaneously at physiologically relevant concentrations using cyclic voltammetry.
Journal ArticleDOI
On-chip integrated vertically aligned carbon nanotube based super- and pseudocapacitors.
Olli Pitkänen,Topias Järvinen,Hanlin Cheng,Hanlin Cheng,Gabriela S. Lorite,Aron Dombovari,Lassi Rieppo,Saikat Talapatra,Hai M. Duong,Geza Toth,Koppány L. Juhász,Zoltán Kónya,Ákos Kukovecz,Pulickel M. Ajayan,Pulickel M. Ajayan,Robert Vajtai,Robert Vajtai,Krisztian Kordas +17 more
TL;DR: The demonstrated on-chip integration is up and down-scalable, compatible with standard CMOS processes, and offers lightweight energy storage what is vital for portable and autonomous device operation with numerous advantages as compared to electronics built from discrete components.
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Green Carbon Nanofiber Networks for Advanced Energy Storage
Jiayuan Wei,Shiyu Geng,Olli Pitkänen,Topias Järvinen,Krisztian Kordas,Kristiina Oksman,Kristiina Oksman,Kristiina Oksman +7 more
TL;DR: In this paper, supercapacitors of high performance are in great need due to the continuous expansion of digitalization and related devices for mobile electronics, autonomous sensors, and sensors.
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Industrially benign super-compressible piezoresistive carbon foams with predefined wetting properties: from environmental to electrical applications.
Tung Ngoc Pham,Ajaikumar Samikannu,Jarmo Kukkola,Anne-Riikka Rautio,Olli Pitkänen,Aron Dombovari,Gabriela S. Lorite,Teemu Sipola,Geza Toth,Melinda Mohl,Jyri-Pekka Mikkola,Krisztian Kordas +11 more
TL;DR: Electrically conductive, flexible, lightweight carbon sponge materials derived from open-pore structure melamine foams are studied and explored and are remarkable competitors with other three-dimensional carbon materials typically based on pyrolyzed biopolymers or on covalently bonded graphene and carbon nanotube frameworks.
Journal ArticleDOI
Piezoresistive Carbon Foams in Sensing Applications
Krisztian Kordas,Olli Pitkänen +1 more
TL;DR: In this article, a case study on carbon foams and hierarchical hybrid structures with carbon nanotubes/nanofibers is presented, and the results show highly nonlinear electrical resistance and mechanical stress dependence on uniaxial strain in both types of materials up to 50% compression.