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2019

Improving the performance of infrared detectors by plasmonics

Tappura, K., 2019.

Research output: Contribution to conferenceConference PosterScientificpeer-review

Integration of fluidic channels and total internal reflection excitation with supercritical angle fluorescence detection

Tappura, K., Mäyrä, A., Alamäki, M., Kokkonen, A., Aikio, S. & Hiltunen, M., Jun 2019, In : EPJ Web of Conferences. 215, 15002.

Research output: Contribution to journalArticle in a proceedings journalScientificpeer-review

Open Access
fluidics
readout
optics
fluorescence
polystyrene

SAFTIR - a novel point-of-need diagnostic platform for animal health and food safety

Utriainen, M., Saviranta, P., Aikio, S., Hiltunen, M., Kokkonen, A., Mäyrä, A., Alamäki, M., Vasama, H. & Tappura, K., 1 Jan 2019, Precision Livestock Farming 2019: Papers Presented at the 9th European Conference on Precision Livestock Farming, ECPLF 2019. O'Brien, B., Hennessy, D. & Shalloo, L. (eds.). p. 721-726

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

animal health
food safety
fluorescence
biosensors
optics

Silicon gradient refractive index lens for millimeter wave radiometers

Pursula, P., Lamminen, A., Mannila, R., Tappura, K. & Saarilahti, J., Sep 2019, IRMMW-THz 2019: 44th International Conference on Infrared, Millimeter, and Terahertz Waves. IEEE Institute of Electrical and Electronic Engineers , 8874541. (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz, Vol. 2019-September).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Radiometers
Millimeter waves
Lenses
Refractive index
Silicon
2018
8 Citations (Scopus)

A numerical study on the design trade-offs of a thin-film thermoelectric generator for large-area applications

Tappura, K., 1 May 2018, In : Renewable Energy. 120, p. 78-87 10 p.

Research output: Contribution to journalArticleScientificpeer-review

Thin films
Thermal gradients
Heat transfer
Thin film devices
Energy harvesting

A Thin-Film Thermoelectric Generator for Large-Area Applications

Tappura, K. & Jaakkola, K., 2018, In : Proceedings. 2, 13, 779.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
Sensor nodes
Thin films
Sensors
Thermal gradients
Heat flux

Enhancing the Performance of Commercial Infrared Detectors by Surface Plasmons

Tappura, K., 2018, In : Proceedings. 2, 13, 63.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
infrared detectors
plasmons
cost reduction
detectors
micrometers
1 Citation (Scopus)

Exploitation of Transparent Conductive Oxides in the Implementation of a Window-Integrated Wireless Sensor Node

Jaakkola, K. & Tappura, K., 1 Sep 2018, In : IEEE Sensors Journal. 18, 17, p. 7193-7202 10 p., 8401879.

Research output: Contribution to journalArticleScientificpeer-review

exploitation
Sensor nodes
antennas
Zinc oxide
zinc oxides

Silicon Based Nano-Thermoelectric Bolometers for Infrared Detection

Varpula, A., Grigoras, K., Tappura, K., Timofeev, A., Shchepetov, A., Hassel, J., Ahopelto, J. & Prunnila, M., 6 Dec 2018, In : Proceedings. 2, 5 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
bolometers
photometers
silicon
membranes
costs

Silicon nano-thermoelectric detectors for for sensing and instrumentation applications

Varpula, A., Renahy, D., Grigoras, K., Tappura, K., Timofeev, A., Shchepetov, A., Hassel, J., Ahopelto, J., Gomès, S. & Prunnila, M., 5 Dec 2018, Book of abstracts. Nanoscale and Microscale Heat Transfer VI : Eurotherm seminar No 111. 192

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

detectors
silicon
thermocouples
figure of merit
thermopiles

Thermal detectors utilizing superconducting kinetic inductance and an imaging system for person security screening

Hassel, J., Sipola, H., Grönberg, L., Mäyrä, A., Aikio, M., Tappura, K., Timofeev, A., Rautiainen, A., Vesterinen, V., Leivo, M., Gao, F., Vasama, H. & Luukanen, A., 3 Dec 2018, Nanoscale and Microscale Heat Transfer VI: Eurotherm seminar No 111. p. 75 147

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

Open Access
inductance
screening
detectors
kinetics
bolometers

Thin-film thermoelectric devices for energy harvesting and material parameter extraction

Tappura, K., Jaakkola, K., Juntunen, T., Tittonen, I. & Ritasalo, R., 15 May 2018, Book of Abstracts: Micronano System Workshop May 13-15, 2018. Espoo: Aalto University, p. 31 1 p.

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

Open Access
Parameter extraction
Energy harvesting
Thin films
Zinc oxide
Oxides
2017
7 Citations (Scopus)

Fluorimetric oxygen sensor with an efficient optical read-out for in vitro cell models

Välimäki, H., Verho, J., Kreutzer, J., Kattipparambil Rajan, D., Ryynänen, T., Pekkanen-Mattila, M., Ahola, A., Tappura, K., Kallio, P. & Lekkala, J., 1 Jan 2017, In : Sensors and Actuators B: Chemical. 249, p. 738-746 9 p.

Research output: Contribution to journalArticleScientificpeer-review

Oxygen sensors
Polystyrenes
Lenses
sensors
polystyrene
12 Citations (Scopus)

Optical and electrical characterization of a large kinetic inductance bolometer focal plane array

Timofeev, A., Luomahaara, J., Grönberg, L., Mäyrä, A., Sipola, H., Aikio, M., Metso, M., Vesterinen, V., Tappura, K., Ala-Laurinaho, J., Luukanen, A. & Hassel, J., 1 Mar 2017, In : IEEE Transactions on Terahertz Science and Technology. 7, 2, p. 218 - 224 7 p., 7811297.

Research output: Contribution to journalArticleScientificpeer-review

Bolometers
Focal plane arrays
bolometers
focal plane devices
inductance
2016

Computational design of thin-film thermoelectric devices for large area applications

Tappura, K., 2016, p. 20-20. 1 p.

Research output: Contribution to conferenceConference AbstractScientificpeer-review

Thermal gradients
Thin films
Geometry
Computational methods
Electric properties

Fluorimetric oxygen sensor for in vitro cell models

Välimäki, H., Kreutzer, J., Verho, J., Tappura, K. & Lekkala, J., 2016, In : Procedia Engineering. 168, p. 610-613

Research output: Contribution to journalArticleScientificpeer-review

Open Access
Oxygen sensors
Dyes
Oxygen
Polystyrenes
Sensors
6 Citations (Scopus)

Influence of Substrate on Plasmon-Induced Absorption Enhancements

Tappura, K., Luomahaara, J., Haatainen, T., Hassel, J. & Vehmas, T., 2016, In : Plasmonics. 11, 2, p. 627-635

Research output: Contribution to journalArticleScientificpeer-review

Open Access
Silicon
Thin films
Silicon solar cells
Substrates
Amorphous silicon

Plasmoniset infrapunailmaisimet

Translated title of the contribution: Plasmonic infrared detectorsTappura, K., 2016, 10 p. (MATINEn raporttisarja B).

Research output: Book/ReportReport

Open Access

TransFlexTeg: Large area transparent thin film thermoelectric devices for smart window and flexible applications

Bari, M., Loureiro, J., Pudas, M., Tappura, K., Jaakkola, K., Ruoho, M., Tittonen, I., Volz, S., Pavan, C., Costabello, K., Bollen, D., Haslam, M. & Ferreira, I., 2016, p. 19-19.

Research output: Contribution to conferenceConference AbstractScientificpeer-review

Energy harvesting
Thermal energy
Thin films
Sensor networks
Sensors
2015

Periodic plasmonic nanostructures for enhanced light absorption in silicon

Tappura, K., 2015.

Research output: Contribution to conferenceConference AbstractScientific

electromagnetic absorption
silicon
thin films
spectral sensitivity
plasmons

Plasmoniset infrapunailmasimet

Translated title of the contribution: Plasmonic infrared detectorsTappura, K., 2015, 7 p. (Maanpuolustuksen tieteellinen neuvottelukunta. Raporttisarja B).

Research output: Book/ReportReport

Open Access
18 Citations (Scopus)

Si, GaAs, and InP as cathode materials for photon-enhanced thermionic emission solar cells

Varpula, A., Tappura, K. & Prunnila, M., 2015, In : Solar Energy Materials and Solar Cells. 134, p. 351-358

Research output: Contribution to journalArticleScientificpeer-review

Thermionic emission
Solar cells
Cathodes
Photons
High temperature operations
3 Citations (Scopus)

van der Waals interactions are critical in Car-Parrinello molecular dynamics simulations of porphyrin-fullerene dyads

Karilainen, T., Cramariuc, O., Kuisma, M., Tappura, K. & Hukka, T. I., 2015, In : Journal of Computational Chemistry. 36, 9, p. 612-621

Research output: Contribution to journalArticleScientificpeer-review

Porphyrin
Fullerenes
Van Der Waals
Porphyrins
Molecular Dynamics Simulation
2014
24 Citations (Scopus)

Printed environmentally friendly supercapacitors with ionic liquid electrolytes on paper

Pettersson, F., Keskinen, J., Remonen, T., von Hertzen, L., Jansson, E., Tappura, K., Zhang, Y., Wilen, C-E. & Österbacka, R., 2014, In : Journal of Power Sources. 271, p. 298-304 7 p.

Research output: Contribution to journalArticleScientificpeer-review

Ionic Liquids
electrochemical capacitors
Ionic liquids
Electrolytes
choline

Printed supercapacitors: Project report

Keskinen, J., Jansson, E., Hertzen, L. V., Yli-Rantala, E., Maaninen, T., Jussila, S., Johansson, M., Remonen, T., Pettersson, F., Kielosto, S., Eiroma, K., Flyktman, T., Grönberg, V., Zhang, Y., Ranta, A., Wilén, C-E., Österbacka, R., Kauranen, P., Munter, T. & Tappura, K., 2014, Tampere: VTT Technical Research Centre of Finland. 66 p. (VTT Tutkimusraportti, Vol. VTT-R-02902-14).

Research output: Book/ReportReport

2013
1 Citation (Scopus)

Self-assembly of pyridine-modified lipoic acid derivatives on gold and their interaction with thyroxine (T4)

Albers, W. M., Milani, R., Tappura, K., Munter, T., Resnati, G. & Metrangolo, P., 2013, In : International Journal of Molecular Sciences. 14, 2, p. 3500-3513 14 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
lipoic acid
thyroxine
Thioctic Acid
Thyroxine
Gold
16 Citations (Scopus)

Surface properties and interaction forces of biopolymer-doped conductive polypyrrole surfaces by atomic force microscopy

Pelto, J., Haimi, S. P., Silander, A., Miettinen, S. S., Tappura, K., Higgins, M. J. & Wallace, G. G., 2013, In : Langmuir. 29, 20, p. 6099-6108 9 p.

Research output: Contribution to journalArticleScientificpeer-review

Biopolymers
biopolymers
polypyrroles
Polypyrroles
surface properties
2012
8 Citations (Scopus)

Cysteine-tagged chimeric avidin forms high binding capacity layers directly on gold

Vikholm-Lundin, I., Auer, S., Paakkunainen, M., Määttä, J. A. E., Munter, T., Leppiniemi, J., Hytönen, V. P. & Tappura, K., 2012, In : Sensors and Actuators B: Chemical. 171-172, p. 440-448 8 p.

Research output: Contribution to journalArticleScientificpeer-review

Avidin
cysteine
Antigens
Antibodies
Gold

Determination of thickness and optical constants of thin films by dual medium and multi-wavelength SPR spectroscopy

Albers, W. M., Viitala, T., Granqvist, N., Liang, H., Sadowski, J. W., Vikholm-Lundin, I. M. & Tappura, K., 2012.

Research output: Contribution to conferenceConference AbstractScientificpeer-review

thin films
surface plasmon resonance
wavelengths
spectroscopy
ellipsometry
10 Citations (Scopus)

Structural and functional characteristics of chimeric avidins physically adsorbed onto functionalized polythiophene thin films

Albers, W. M., Pelto, J. M., Suspène, C., Määttä, J. A., Yassar, A., Hytönen, V. P., Vikholm-Lundin, I. M. & Tappura, K., 2012, In : ACS Applied Materials & Interfaces. 4, 8, p. 4067-4077 10 p.

Research output: Contribution to journalArticleScientificpeer-review

Avidin
Thin films
Polymers
Biosensors
Antibodies
2011

Applying a surface-sensitive fluorescence method to fast on-site detection of cocaine in saliva

Välimäki, H., Auer, S., Hellgren, A-C. & Tappura, K., 2011, In : Procedia Engineering. 25, p. 968-971 4 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
Fluorescence
Molecular recognition
Molecules
Antibodies
Lenses
11 Citations (Scopus)

High-Q micromechanical resonators for mass sensing in dissipative media

Tappura, K., Pekko, P. & Seppä, H., 2011, In : Journal of Micromechanics and Microengineering. 21, 6, 7 p., 065002.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
Micromechanical resonators
Resonators
Wine
Silicon
Contacts (fluid mechanics)
2010
5 Citations (Scopus)

Applying total internal reflection excitation and super critical angle fluorescence detection to a morphine assay

Välimäki, H., Pulli, T. & Tappura, K., 2010, In : Journal of Fluorescence. 20, 5, p. 1003-1008 6 p.

Research output: Contribution to journalArticleScientificpeer-review

Morphine
Assays
Fluorescence
drug
Antibodies

Low-temperature solution-processed ZnO transistors

Ojanperä, K., Raappana, J., Alastalo, A., Leppäniemi, J., Kololuoma, T., Mattila, T., Munter, T. & Tappura, K., 2010, International Conference and Exhibition for the Organic and Printed Electronics Industry, 2010. p. 206-208

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

transistors
casts
threshold voltage
capacitors
depletion

PYTHIA Project Realizes First All-Si Truly Integrated Mach-Zehnder Biosensor Arrays for Label-free Detection Schemes

Jobst, G., Moser, I., Stoffer, R., Hoekman, M., Heideman, R., Leeuwis, H., Tukkiniemi, K., Tappura, K., Kamakari, S., Nounessis, G., Bhattacharya, S., Rysz, J., Budkowski, A., Kitsara, M., Makarona, E., Petrou, P., Kakabakos, S., Misiakos, K. & Raptis, I., 2010, In : MST News. 1, p. 10-12

Research output: Contribution to journalArticleProfessional

bioinstrumentation
transducers
cartridges
reaction time
delivery
3 Citations (Scopus)

Vapor-phase self-assembled monolayers for improved MEMS reliability

Rissanen, A., Tappura, K., Laamanen, M., Puurunen, R., Färm, E., Ritala, M. & Leskelä, M., 2010, Proceedings of IEEE Sensors 2010. IEEE Institute of Electrical and Electronic Engineers , p. 767-770

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Self assembled monolayers
MEMS
Stiction
Vapors
Coatings