Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Tauno Kahro"'
Autor:
Shivasubramanian Gopinath, Andrei Bleahu, Tauno Kahro, Aravind Simon John Francis Rajeswary, Ravi Kumar, Kaupo Kukli, Aile Tamm, Joseph Rosen, Vijayakumar Anand
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-14 (2023)
Abstract Fresnel incoherent correlation holography (FINCH) is a well-established incoherent digital holography technique. In FINCH, light from an object point splits into two, differently modulated using two diffractive lenses with different focal di
Externí odkaz:
https://doaj.org/article/e27a178ca1864ceeb146968d4c89c8b2
Autor:
Molong Han, Daniel Smith, Tauno Kahro, Dominyka Stonytė, Aarne Kasikov, Darius Gailevičius, Vipin Tiwari, Agnes Pristy Ignatius Xavier, Shivasubramanian Gopinath, Soon Hock Ng, Aravind Simon John Francis Rajeswary, Aile Tamm, Kaupo Kukli, Keith Bambery, Jitraporn Vongsvivut, Saulius Juodkazis, Vijayakumar Anand
Publikováno v:
Micromachines, Vol 15, Iss 4, p 537 (2024)
Axial resolution is one of the most important characteristics of a microscope. In all microscopes, a high axial resolution is desired in order to discriminate information efficiently along the longitudinal direction. However, when studying thick samp
Externí odkaz:
https://doaj.org/article/8dfbdf383b5946e7ae148d7aa81db740
Autor:
Andrei-ioan Bleahu, Shivasubramanian Gopinath, Tauno Kahro, Soon Hock Ng, Kaupo Kukli, Aile Tamm, Saulius Juodkazis, Joseph Rosen, Vijayakumar Anand
Publikováno v:
Results in Physics, Vol 52, Iss , Pp 106839- (2023)
Manufacturing diffractive lenses with a high Numerical Aperture (NA) is a challenging task due to limitations in lithography methods and the inverse relation between the width and the radius of the zones. With low-resolution lithography techniques su
Externí odkaz:
https://doaj.org/article/1ec85574b5574def90a807db5a2dcd70
Autor:
Margus Kodu, Rainer Pärna, Tea Avarmaa, Indrek Renge, Jekaterina Kozlova, Tauno Kahro, Raivo Jaaniso
Publikováno v:
Chemosensors, Vol 11, Iss 8, p 460 (2023)
Chemiresistive gas sensors were produced by functionalizing graphene with a ~3 nm layer of mixed oxide xCu2O⸱yMnO using pulsed laser deposition (PLD) from a hopcalite CuMn2O4 target. Sensor response time traces were recorded for strongly oxidizing
Externí odkaz:
https://doaj.org/article/bb9a11fa26cf422281bc0e2c47df2412
Autor:
Tauno Kahro, Kristina Raudonen, Joonas Merisalu, Aivar Tarre, Peeter Ritslaid, Aarne Kasikov, Taivo Jõgiaas, Tanel Käämbre, Markus Otsus, Jekaterina Kozlova, Harry Alles, Aile Tamm, Kaupo Kukli
Publikováno v:
Nanomaterials, Vol 13, Iss 8, p 1323 (2023)
SiO2 films were grown to thicknesses below 15 nm by ozone-assisted atomic layer deposition. The graphene was a chemical vapor deposited on copper foil and transferred wet-chemically to the SiO2 films. On the top of the graphene layer, either continuo
Externí odkaz:
https://doaj.org/article/a04d80afdb2a45dbada4cec7bab3baa9
Autor:
Shivasubramanian Gopinath, Praveen Periysamy Angamuthu, Tauno Kahro, Andrei Bleahu, Francis Gracy Arockiaraj, Daniel Smith, Soon Hock Ng, Saulius Juodkazis, Kaupo Kukli, Aile Tamm, Vijayakumar Anand
Publikováno v:
Photonics, Vol 10, Iss 1, p 3 (2022)
Direct imaging systems that create an image of an object directly on the sensor in a single step are prone to many constraints, as a perfect image is required to be recorded within this step. In designing high resolution direct imaging systems with a
Externí odkaz:
https://doaj.org/article/44baddf803104eb78d2d398f6727292a
Autor:
P. A. Praveen, Francis Gracy Arockiaraj, Shivasubramanian Gopinath, Daniel Smith, Tauno Kahro, Sandhra-Mirella Valdma, Andrei Bleahu, Soon Hock Ng, Andra Naresh Kumar Reddy, Tomas Katkus, Aravind Simon John Francis Rajeswary, Rashid A. Ganeev, Siim Pikker, Kaupo Kukli, Aile Tamm, Saulius Juodkazis, Vijayakumar Anand
Publikováno v:
Photonics, Vol 9, Iss 9, p 625 (2022)
A refractive lens is one of the simplest, most cost-effective and easily available imaging elements. Given a spatially incoherent illumination, a refractive lens can faithfully map every object point to an image point in the sensor plane, when the ob
Externí odkaz:
https://doaj.org/article/eb67e10373864a24934de2d6323b8c25
Autor:
Martin Lind, Valter Kiisk, Margus Kodu, Tauno Kahro, Indrek Renge, Tea Avarmaa, Prashanth Makaram, Amaia Zurutuza, Raivo Jaaniso
Publikováno v:
Chemosensors, Vol 10, Iss 2, p 68 (2022)
Miniature and low-power gas sensing elements are urgently needed for a portable electronic nose, especially for outdoor pollution monitoring. Hereby we prepared chemiresistive sensors based on wide-area graphene (grown by chemical vapor deposition) p
Externí odkaz:
https://doaj.org/article/6d14fffec6ac40c7b0d6555e0545dac9
Publikováno v:
Applied Sciences, Vol 12, Iss 5, p 2491 (2022)
Nanostructures with graphene make them highly promising for nanoelectronics, memristor devices, nanosensors and electrodes for energy storage. In some devices the mechanical properties of graphene are important. Therefore, nanoindentation has been us
Externí odkaz:
https://doaj.org/article/c05928de3e3545d1b3090365c087cea3
Autor:
Margus Kodu, Artjom Berholts, Tauno Kahro, Mati Kook, Peeter Ritslaid, Helina Seemen, Tea Avarmaa, Harry Alles, Raivo Jaaniso
Publikováno v:
Beilstein Journal of Nanotechnology, Vol 8, Iss 1, Pp 571-578 (2017)
Graphene has been recognized as a promising gas sensing material. The response of graphene-based sensors can be radically improved by introducing defects in graphene using, for example, metal or metal oxide nanoparticles. We have functionalised CVD g
Externí odkaz:
https://doaj.org/article/1715c0c171e441c6948574f4bfa535f9