Control of Silver Nano-particle Nucleation and Synthesis with Nanocelluloses: Applications in Paper-based Sensing and Anti-microbial Activity

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.advisor Orelma, Hannes, Dr., VTT Technical Research Centre of Finland, Finland
dc.contributor.advisor Lokanathan, Arcot R., Dr., Achira Labs Pvt. Ltd., India Uddin, Khan Mohammad Ahsan 2018-03-06T10:02:46Z 2018-03-06T10:02:46Z 2018
dc.identifier.isbn 978-952-60-7803-8 (electronic)
dc.identifier.isbn 978-952-60-7802-1 (printed)
dc.identifier.issn 1799-4942 (electronic)
dc.identifier.issn 1799-4934 (printed)
dc.identifier.issn 1799-4934 (ISSN-L)
dc.description.abstract The synthesis of silver nanoparticles (AgNPs) has drawn significant research interest due to their unique and well-defined physical-chemical properties. Developing a feasible chemical method to synthesize silver nanoparticles using sustainable, renewable, and environmentally friendly materials is very important for environmental safely. In this work, a new route for the synthesis of silver nanoparticles (AgNPs) by using sustainable, renewable and environmentally friendly cellulose nanocrystals (CNCs) is described. Moreover, in this study the utilization of cellulose-AgNPs materials in sensing and antibacterial applications was investigated. The influence of the surface charge of cellulose nanocrystals on the rate of nucleation, growth, stabilization and size distribution of AgNPs was investigated. CNCs produced by sulfuric acid hydrolysis followed by partial desulfation and CNC produced by hydrochloric acid (HCl) hydrolysis followed by different levels of carboxylation by TEMPO-mediated oxidation were used to elucidate the effects of sulfate ester and of carboxyl groups on the silver nanoparticle synthesis process. The results shed light on the mechanistic aspects related to synthesis, control of nucleation, and stabilization of AgNP in a sustainable way, and highlight the potential of CNCs in metal nanoparticle synthesis. The fundamental knowledge of controlled nucleation of plasmonic silver nanoparticles by cellulose was applied to demonstrate a new plasmonic sensing mechanism for qualitative detection of proteins on paper. In contrast to conventional paper-based diagnostic devices that use the cellulosic component as a support structure, the proposed method takes advantage of cellulose as a nucleation controller during silver nanoparticle formation. Reduction of silver ions interacting competitively with the nucleation controlling cellulosic surface and the suppressing effect of protiens on reduction (via complexation) resulted in silver nanoparticles whose size–shape dependent plasmonic properties quantitatively reflected the concentration of protein on paper. In addition, aerogels prepared from aqueous dispersions of anionic and cationic cellulose nanofibrils (CNFs) were investigated as solid supports for enzymes and silver nanoparticles to elicit a sustained antibacterial effect. The antibacterial activity of CNF aerogels loaded with silver nanoparticles (AgNP) after in situ synthesis via UV reduction was tested against gram-negative and gram-positive bacteria. The results were compared with CNFs aerogels carrying antibacterial lysozyme. en
dc.format.extent 82 + app. 50
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Aalto University en
dc.publisher Aalto-yliopisto fi
dc.relation.ispartofseries Aalto University publication series DOCTORAL DISSERTATIONS en
dc.relation.ispartofseries 9/2018
dc.relation.haspart [Publication 1]: Lokanathan, A. R., Uddin, K. M. A., Rojas, O. J., Laine, J. (2014) Cellulose Nanocrystal-Mediated Synthesis of Silver Nanoparticles: Role of Sulfate Groups in Nucleation Phenomena. Biomacromolecules, 15, 373-379. (A.R.L and K.M.A.U contributed equally as first authors). DOI: 10.1021/bm401613h
dc.relation.haspart [Publication 2]: Uddin, K. M. A., Lokanathan, A. R., Liljeström, A., Chen, X., Rojas, O. J., Laine, J. (2014) Silver nanoparticle synthesis mediated by cellulose nanocrystals. Green Materials, 2, (4), 183-192. DOI: 10.1680/gmat.14.00010
dc.relation.haspart [Publication 3]: Lokanathan, A. R.,Uddin, K. M. A., Chen, X., Wenchao, X., Xianming, K., Johansson, L.S., Ras, R.H.A., Rojas, O. J. (2015) Paper-based plasmon-enhanced protein sensing by controlled nucleation of silver nanoparticles on cellulose. Cellulose, 22, 4027-4034. DOI: 10.1007/s10570-015-0783-z
dc.relation.haspart [Publication 4]: Uddin, K. M. A., Orelma, H., Mohammadi, P., Borghei, M., Laine, J., Linder, M., Rojas, O. J. (2017) Retention of lysozyme activity by physical immobilization in nanocellulose aerogels and their antibacterial effect. Cellulose, 24, (7), 2837-2848. DOI: 10.1007/s10570-017-1311-0
dc.subject.other Biotechnology en
dc.subject.other Physics en
dc.title Control of Silver Nano-particle Nucleation and Synthesis with Nanocelluloses: Applications in Paper-based Sensing and Anti-microbial Activity en
dc.type G5 Artikkeliväitöskirja fi Kemian tekniikan korkeakoulu fi School of Chemical Technology en
dc.contributor.department Biotuotteiden ja biotekniikan laitos fi
dc.contributor.department Department of Bioproducts and Biosystems en
dc.subject.keyword Nanocellulose en
dc.subject.keyword Nanoparticles en
dc.subject.keyword Paper-based sensing en
dc.subject.keyword Enzyme stability en
dc.identifier.urn URN:ISBN:978-952-60-7803-8
dc.type.dcmitype text en
dc.type.ontasot Doctoral dissertation (article-based) en
dc.type.ontasot Väitöskirja (artikkeli) fi
dc.contributor.supervisor Rojas, Orlando J., Prof., Aalto University, Department of Bioproducts and Biosystems, Finland
dc.opn Mathew, Aji Palikunnel, Prof., Stockholm University, Sweden
dc.contributor.lab Bio-based Colloids and Materials (BiCMat) en
dc.rev Batchelor, Warren, Dr., Monash University, Australia
dc.rev Freire Barros, Carmen Sofia da Rocha, Dr., University of Aveiro, Portugal 2018-01-26
local.aalto.acrisexportstatus exported

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