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Publikasjoner (7 av 7) Visa alla publikasjoner
Josefsson, L., Ye, X., Brett, C., Meijer, J., Olsson, C., Sjögren, A., . . . Lendel, C. (2020). Potato Protein Nanofibrils Produced from a Starch Industry Sidestream. ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 8(2), 1058-1067
Åpne denne publikasjonen i ny fane eller vindu >>Potato Protein Nanofibrils Produced from a Starch Industry Sidestream
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2020 (engelsk)Inngår i: ACS SUSTAINABLE CHEMISTRY & ENGINEERING, ISSN 2168-0485, Vol. 8, nr 2, s. 1058-1067Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Protein nanofibrils have emerged as promising building blocks in functional bio/nanomaterials as well as in food products. We here demonstrate that nanofibrils with amyloid-like properties can be produced from potato protein isolate, a major sidestream from the starch industry. Methods for solubilization of potato proteins are evaluated, and a protocol for the assembly of protein nanofibrils is presented. Characterization of the nanofibrils shows that they are rich in beta-sheet structure and display the cross-beta X-ray fiber diffraction pattern, which is a hallmark of amyloid-like fibrils. Atomic force microscopy shows that the fibrils are ca. 4-5 nm in diameter with a nanoscale morphology that displays a high degree of curvature. Using mass spectrometry we identify four peptides that constitute the core building blocks of the nanofibrils and show that they originate from two different classes of proteins. The structural characteristics of these peptides are distinct from previously studied plant protein nanofibrils and thereby reveal new knowledge about the formation of protein nanostructures from agricultural resources.

sted, utgiver, år, opplag, sider
AMER CHEMICAL SOC, 2020
Emneord
Potato protein, Nanomaterials, Biobased materials, Amyloid, Mass spectrometry
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-268715 (URN)10.1021/acssuschemeng.9b05865 (DOI)000509432200036 ()
Merknad

QC 20200220

Tilgjengelig fra: 2020-02-20 Laget: 2020-02-20 Sist oppdatert: 2020-02-20bibliografisk kontrollert
Gensch, M., Schwartzkopf, M., Ohm, W., Brett, C., Pandit, P., Varalil, S. K., . . . Roth, S. V. (2019). Correlating Nanostructure, Optical and Electronic Properties of Nanogranular Silver Layers during Polymer-Template-Assisted Sputter Deposition. ACS Applied Materials and Interfaces, 11(32), 29416-29426
Åpne denne publikasjonen i ny fane eller vindu >>Correlating Nanostructure, Optical and Electronic Properties of Nanogranular Silver Layers during Polymer-Template-Assisted Sputter Deposition
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2019 (engelsk)Inngår i: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 11, nr 32, s. 29416-29426Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Tailoring the optical and electronic properties of nanostructured polymer-metal composites demonstrates great potential for efficient fabrication of modern organic optical and electronic devices such as flexible sensors, transistors, diodes, or photovoltaics. Self-assembled polymer metal nanocomposites offer an excellent perspective for creating hierarchical nanostructures on macroscopic scales by simple bottom-up processes. We investigate the growth processes of nanogranular silver (Ag) layers on diblock copolymer thin film templates during sputter deposition. The Ag growth is strongly driven by self-assembly and selective wetting on the lamella structure of polystyrene-block-poly (methyl methacrylate). We correlate the emerging nanoscale morphologies with collective optical and electronic properties and quantify the difference in Ag growth on the corresponding homopolymer thin films. Thus, we are able to determine the influence of the respective polymer template and observe substrate effects on the Ag cluster percolation threshold, which affects the insulator-to-metal transition (IMT). Optical spectroscopy in the UV-vis regime reveals localized surface plasmon resonance for the metal polymer composite. Their maximum absorption is observed around the IMT due to the subsequent long-range electron conduction in percolated nanogranular Ag layers. Using X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy, we identify the oxidation of Ag at the acrylate side chains as an essential influencing factor driving the selective wetting behavior in the early growth stages. The results of polymer-templated cluster growth are corroborated by atomic force microscopy and field emission scanning electron microscopy.

sted, utgiver, år, opplag, sider
AMER CHEMICAL SOC, 2019
Emneord
polymer-metal interface, metal cluster percolation, growth kinetics, GISAXS, block copolymer
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-257808 (URN)10.1021/acsami.9b08594 (DOI)000481567100090 ()31313904 (PubMedID)2-s2.0-85071352839 (Scopus ID)
Merknad

QC 20190912

Tilgjengelig fra: 2019-09-12 Laget: 2019-09-12 Sist oppdatert: 2019-09-12bibliografisk kontrollert
Glier, T. E., Akinsinde, L., Paufler, M., Otto, F., Hashemi, M., Grote, L., . . . Ruebhausen, M. (2019). Functional Printing of Conductive Silver-Nanowire Photopolymer Composites. Scientific Reports, 9, Article ID 6465.
Åpne denne publikasjonen i ny fane eller vindu >>Functional Printing of Conductive Silver-Nanowire Photopolymer Composites
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2019 (engelsk)Inngår i: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 9, artikkel-id 6465Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We investigated the fabrication and functional behaviour of conductive silver-nanowire-polymer composites for prospective use in printing applications. Silver-nanowires with an aspect ratio of up to 1000 were synthesized using the polyol route and embedded in a UV-curable and printable polymer matrix. Sheet resistances in the composites down to 13 Omega/sq at an optical transmission of about 90% were accomplished. The silver-nanowire composite morphology and network structure was investigated by electron microscopy, atomic force microscopy, profilometry, ellipsometry as well as surface sensitive X-ray scattering. By implementing different printing applications, we demonstrate that our silver nanowires can be used in different polymer composites. On the one hand, we used a tough composite for a 2D-printed film as top contact on a solar cell. On the other hand, a flexible composite was applied for a 3D-printed flexible capacitor.

sted, utgiver, år, opplag, sider
NATURE PUBLISHING GROUP, 2019
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-251276 (URN)10.1038/s41598-019-42841-3 (DOI)000465218400016 ()31015552 (PubMedID)2-s2.0-85064889866 (Scopus ID)
Merknad

QC 20190514

Tilgjengelig fra: 2019-05-14 Laget: 2019-05-14 Sist oppdatert: 2019-05-29bibliografisk kontrollert
Brett, C., Mittal, N., Ohm, W., Söderberg, D. & Roth, S. V. (2019). GISAS study of spray deposited metal precursor ink on a cellulose template. Paper presented at National Meeting of the American-Chemical-Society (ACS), MAR 31-APR 04, 2019, Orlando, FL. Abstracts of Papers of the American Chemical Society, 257
Åpne denne publikasjonen i ny fane eller vindu >>GISAS study of spray deposited metal precursor ink on a cellulose template
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2019 (engelsk)Inngår i: Abstracts of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 257Artikkel i tidsskrift, Meeting abstract (Annet vitenskapelig) Published
sted, utgiver, år, opplag, sider
AMER CHEMICAL SOC, 2019
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-257597 (URN)000478860503076 ()
Konferanse
National Meeting of the American-Chemical-Society (ACS), MAR 31-APR 04, 2019, Orlando, FL
Merknad

QC 20190919

Tilgjengelig fra: 2019-09-19 Laget: 2019-09-19 Sist oppdatert: 2019-09-19bibliografisk kontrollert
Ohm, W., Rothkirch, A., Pandit, P., Koerstgens, V., Mueller-Buschbaum, P., Rojas, R., . . . Roth, S. V. (2019). Morphological and crystalline properties of airbrush spray-deposited enzymatic cellulose thin films. Paper presented at National Meeting of the American-Chemical-Society (ACS), MAR 31-APR 04, 2019, Orlando, FL. Abstracts of Papers of the American Chemical Society, 257
Åpne denne publikasjonen i ny fane eller vindu >>Morphological and crystalline properties of airbrush spray-deposited enzymatic cellulose thin films
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2019 (engelsk)Inngår i: Abstracts of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 257Artikkel i tidsskrift, Meeting abstract (Annet vitenskapelig) Published
sted, utgiver, år, opplag, sider
AMER CHEMICAL SOC, 2019
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-257617 (URN)000478860502739 ()
Konferanse
National Meeting of the American-Chemical-Society (ACS), MAR 31-APR 04, 2019, Orlando, FL
Merknad

QC 20190918

Tilgjengelig fra: 2019-09-18 Laget: 2019-09-18 Sist oppdatert: 2019-09-18bibliografisk kontrollert
Li, N., Song, L., Biessmann, L., Xia, S., Ohm, W., Brett, C., . . . Mueller-Buschbaum, P. (2019). Morphology Phase Diagram of Slot-Die Printed TiO2 Films Based on Sol-Gel Synthesis. Advanced Materials Interfaces, 6(12), Article ID 1900558.
Åpne denne publikasjonen i ny fane eller vindu >>Morphology Phase Diagram of Slot-Die Printed TiO2 Films Based on Sol-Gel Synthesis
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2019 (engelsk)Inngår i: Advanced Materials Interfaces, ISSN 2196-7350, Vol. 6, nr 12, artikkel-id 1900558Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Mesoporous titania films with tailored nanostructures are fabricated via slot-die printing, which is a simple and cost-effective thin-film deposition technique with the possibility of a large-scale manufacturing. Based on this technique, which is favorable in industry, TiO2 films possess the similar advantage with polymer semiconducting devices like ease of large-scale production. The titania morphologies, including foam-like nanostructures, nanowire aggregates, collapsed vesicles and nanogranules, are achieved via a so-called block-copolymer-assisted sol-gel synthesis. By adjusting the weight fraction of reactants, the ternary morphology phase diagram of the printed titania films is probed after template removal. The surface and inner morphology evolutions are explored with scanning electron microscopy and grazing incidence small-angle X-ray scattering, respectively. Special focus is set on foam-like titania nanostructures as they are of especial interest for, e.g., solar cell applications. At a low weight fraction of the titania precursor titanium(IV)isopropoxide (TTIP), foam-like titania films are achieved, which exhibit a high uniformity and possess large pore sizes. The anatase phase of the highly crystalline titania films is verified with X-ray diffraction and transmission electron microscopy.

sted, utgiver, år, opplag, sider
WILEY, 2019
Emneord
crystallinity, GISAXS, morphology phase diagram, printing, TiO2 films
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-256285 (URN)10.1002/admi.201900558 (DOI)000477979500004 ()2-s2.0-85065237302 (Scopus ID)
Merknad

QC 20191105

Tilgjengelig fra: 2019-11-05 Laget: 2019-11-05 Sist oppdatert: 2019-11-05bibliografisk kontrollert
Brett, C., Mittal, N., Ohm, W., Söderberg, D. & Roth, S. V. (2018). In situ self-assembly study in bio-based thin films. Paper presented at 255th National Meeting and Exposition of the American-Chemical-Society (ACS) - Nexus of Food, Energy, and Water, MAR 18-22, 2018, New Orleans, LA. Abstract of Papers of the American Chemical Society, 255
Åpne denne publikasjonen i ny fane eller vindu >>In situ self-assembly study in bio-based thin films
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2018 (engelsk)Inngår i: Abstract of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 255Artikkel i tidsskrift, Meeting abstract (Annet vitenskapelig) Published
sted, utgiver, år, opplag, sider
AMER CHEMICAL SOC, 2018
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-232279 (URN)000435539906263 ()
Konferanse
255th National Meeting and Exposition of the American-Chemical-Society (ACS) - Nexus of Food, Energy, and Water, MAR 18-22, 2018, New Orleans, LA
Merknad

QC 20180718

Tilgjengelig fra: 2018-07-18 Laget: 2018-07-18 Sist oppdatert: 2018-07-18bibliografisk kontrollert
Organisasjoner
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0001-5789-6299