Self-assembly of mechanoplasmonic bacterial cellulose-metal nanoparticle composites
Eskilson, Olof (Linköping University. Department of Physics, Chemistry and Biology)
Lindström, Stefan (Linköping University. Department of Management and Engineering)
Sepúlveda, Borja (Institut Català de Nanociència i Nanotecnologia)
Shahjamali, Mohammad M. (Harvard University. School of Engineering and Applied Sciences)
Güell Grau, Pau (Institut de Microelectrònica de Barcelona)
Sivlér, Petter (Linköping University. Department of Physics, Chemistry and Biology)
Skog, Marten (Linköping University. Department of Physics, Chemistry and Biology)
Aronsson, Christopher (Linköping University. Department of Physics, Chemistry and Biology)
Björk, Emma M. (Linköping University. Department of Physics, Chemistry and Biology)
Nyberg, Niklas (Linköping University. Department of Physics, Chemistry and Biology)
Khalaf, Hazem (Örebro University. School of Medical Sciences)
Bengtsson, Torbjörn (Örebro University. School of Medical Sciences)
James, Jeemol (University of Gothenburg. Department of Chemistry and Molecular Biology)
Ericson, Marica B. (University of Gothenburg. Department of Chemistry and Molecular Biology)
Martinsson, Erik (Linköping University. Department of Physics, Chemistry and Biology)
Selegård, Robert (Linköping University. Department of Physics, Chemistry and Biology)
Aili, Daniel (Linköping University. Department of Physics, Chemistry and Biology)

Data:	2020
Resum:	Nanocomposites of metal nanoparticles (NPs) and bacterial nanocellulose (BC) enable fabrication of soft and biocompatible materials for optical, catalytic, electronic, and biomedical applications. Current BC-NP nanocomposites are typically prepared by in situ synthesis of the NPs or electrostatic adsorption of surface functionalized NPs, which limits possibilities to control and tune NP size, shape, concentration, and surface chemistry and influences the properties and performance of the materials. Here a self-assembly strategy is described for fabrication of complex and well-defined BC-NP composites using colloidal gold and silver NPs of different sizes, shapes, and concentrations. The self-assembly process results in nanocomposites with distinct biophysical and optical properties. In addition to antibacterial materials and materials with excellent senor performance, materials with unique mechanoplasmonic properties are developed. The homogenous incorporation of plasmonic gold NPs in the BC enables extensive modulation of the optical properties by mechanical stimuli. Compression gives rise to near-field coupling between adsorbed NPs, resulting in tunable spectral variations and enhanced broadband absorption that amplify both nonlinear optical and thermoplasmonic effects and enables novel biosensing strategies.
Ajuts:	Ministerio de Ciencia e Innovación MAT2016-77391-R Ministerio de Ciencia e Innovación SEV-2017-0706
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Antimicrobials ; Bacterial cellulose ; Gold nanoparticles ; Nanocomposite ; Sensors
Publicat a:	Advanced functional materials, Vol. 30, issue 40 (Oct. 2020) , art. 2004766, ISSN 1616-3028

DOI: 10.1002/adfm.202004766

13 p, 5.0 MB

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