Hybrid films from cellulose nanomaterials—properties and defined optical patterns

Autor: Ilona Leppänen, Ari Hokkanen, Monika Österberg, Mika Vähä-Nissi, Ali Harlin, Hannes Orelma

Publikováno v: Leppänen, I, Hokkanen, A, Österberg, M, Vähä-Nissi, M, Harlin, A & Orelma, H 2022, ' Hybrid films from cellulose nanomaterials—properties and defined optical patterns ', Cellulose, vol. 29, no. 16, pp. 8551-8567 . https://doi.org/10.1007/s10570-022-04795-0

Polymer composites with nanocellulose as the reinforcing agent often lack good compatibility between the two components. In this study, we have combined cellulose nanofibrils (CNFs) and cellulose nanocrystals (CNCs) in different ratios to create all-

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::14eaece84c7f688ebfa47bb07cee0c8f
https://doi.org/10.1007/s10570-022-04795-0

Carboxymethyl Cellulose (CMC) Optical Fibers for Environment Sensing and Short-Range Optical Signal Transmission

Autor: Aayush Kumar Jaiswal, Ari Hokkanen, Markku Kapulainen, Alexey Khakalo, null Nonappa, Olli Ikkala, Hannes Orelma

Publikováno v: Jaiswal, A K, Hokkanen, A, Kapulainen, M, Khakalo, A, Nonappa, N, Ikkala, O & Orelma, H 2022, ' Carboxymethyl Cellulose (CMC) Optical Fibers for Environment Sensing and Short-range Optical Signal Transmission ', ACS Applied Materials & Interfaces, vol. 14, no. 2, pp. 3315-3323 . https://doi.org/10.1021/acsami.1c22227
VTT Technical Research Centre of Finland-PURE
ACS Applied Materials & Interfaces

Optical fibers are a key component in modern photonics, where conventionally used polymer materials are derived from fossil-based resources, causing heavy greenhouse emissions and raising sustainability concerns. As a potential alternative, fibers de

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e2f59102db1d1438bdcb41ab9fd2658a
https://doi.org/10.1021/acsami.1c22227

Integration of carboxymethyl cellulose waveguides for smart textile optical sensors

Autor: Sofia Guridi, Ari Hokkanen, Aayush Kumar Jaiswal, Nonappa Nonappa, Pirjo Kaariainen

Publikováno v: Guridi, S, Hokkanen, A, Jaiswal, A K, Nonappa, N & Kääriäinen, P 2022, Integration of carboxymethyl cellulose waveguides for smart textile optical sensors . in 2022 IEEE Sensors Proceedings . IEEE Institute of Electrical and Electronic Engineers, IEEE Sensors 2022, Dallas, Texas, United States, 30/10/22 . https://doi.org/10.1109/SENSORS52175.2022.9967160

The development of novel textile materials capable of controlled interaction with the environment has contributed to the growth of smart textiles. Nevertheless, the ubiquitous integration of plastic and electronic components into textile structures w

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::912ab1f5bdf494e36d135a263e3a6432
https://cris.vtt.fi/en/publications/94ab2518-7cb6-4e53-b870-dcabfbfe59e5

Development of optical phased arrays in a micron-scale silicon photonics platform

Autor: Sidra Tul Muntaha, Ari Hokkanen, Mikko Harjanne, Matteo Cherchi, Pekka Suopajarvi, Petri Karvinen, Markku Pekkarinen, Matthieu Roussey, Timo Aalto

Publikováno v: Muntaha, S T, Hokkanen, A, Harjanne, M, Cherchi, M, Suopajärvi, P, Karvinen, P, Pekkarinen, M, Roussey, M & Aalto, T 2022, Development of optical phased arrays in a micron-scale silicon photonics platform . in S M Garcia-Blanco & P Cheben (eds), Integrated Optics : Devices, Materials, and Technologies XXVI ., 120040W, International Society for Optics and Photonics SPIE, Proceedings of SPIE-The International Society for Optical Engineering, vol. 12004, Integrated Optics: Devices, Materials, and Technologies XXVI, San Francisco, California, United States, 20/02/22 . https://doi.org/10.1117/12.2609605

We have designed and fabricated micro-LiDAR chips based on 1D optical phased arrays (OPAs) that collimate light in the horizontal direction only. Thus, a cylindrical lens is needed for the vertical collimation. A part of the work demonstrates the ana

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b2e64cd85a36966f9f5ad3615a968135
https://doi.org/10.1117/12.2609605

Vapour-assisted roll-to-roll nanoimprinting of micropillars on nanocellulose films

Autor: Tekla Tammelin, Ari Hokkanen, Asko Sneck, Tapio Mäkelä, Teemu Ruotsalainen, Alexey Khakalo

Publikováno v: Microelectronic Engineering
Mäkelä, T, Hokkanen, A, Sneck, A, Ruotsalainen, T, Khakalo, A & Tammelin, T 2020, ' Vapour-assisted roll-to-roll nanoimprinting of micropillars on nanocellulose films ', Microelectronic Engineering, vol. 225, 111258 . https://doi.org/10.1016/j.mee.2020.111258

Here we demonstrate a straightforward vapour-assisted roll-to-roll nanoimprinting lithography (R2RVANIL) patterning method to biobased nanocellulosic films with the aim to fabricate microstructured films with diffraction effect. In the R2RVANIL techn

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61fda4f2b59f1a8ebbc009e77eaba2c6
https://cris.vtt.fi/en/publications/3f83c614-17b5-43c5-af6e-940eb9f1423a