Anisotropic Hollow Microgels That Can Adapt Their Size, Shape, and Softness

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Anisotropic Hollow Microgels That Can Adapt Their Size, Shape, and Softness. / Nickel, Anne C.; Scotti, Andrea; Houston, Judith E.; Ito, Thiago; Crassous, Jérôme; Pedersen, Jan Skov; Richtering, Walter.

I: Nano Letters, Bind 19, Nr. 11, 11.2019, s. 8161-8170.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisLetterForskningpeer review

Harvard

Nickel, AC, Scotti, A, Houston, JE, Ito, T, Crassous, J, Pedersen, JS & Richtering, W 2019, 'Anisotropic Hollow Microgels That Can Adapt Their Size, Shape, and Softness', Nano Letters, bind 19, nr. 11, s. 8161-8170. https://doi.org/10.1021/acs.nanolett.9b03507

APA

Nickel, A. C., Scotti, A., Houston, J. E., Ito, T., Crassous, J., Pedersen, J. S., & Richtering, W. (2019). Anisotropic Hollow Microgels That Can Adapt Their Size, Shape, and Softness. Nano Letters, 19(11), 8161-8170. https://doi.org/10.1021/acs.nanolett.9b03507

CBE

Nickel AC, Scotti A, Houston JE, Ito T, Crassous J, Pedersen JS, Richtering W. 2019. Anisotropic Hollow Microgels That Can Adapt Their Size, Shape, and Softness. Nano Letters. 19(11):8161-8170. https://doi.org/10.1021/acs.nanolett.9b03507

MLA

Vancouver

Nickel AC, Scotti A, Houston JE, Ito T, Crassous J, Pedersen JS o.a. Anisotropic Hollow Microgels That Can Adapt Their Size, Shape, and Softness. Nano Letters. 2019 nov;19(11):8161-8170. https://doi.org/10.1021/acs.nanolett.9b03507

Author

Nickel, Anne C. ; Scotti, Andrea ; Houston, Judith E. ; Ito, Thiago ; Crassous, Jérôme ; Pedersen, Jan Skov ; Richtering, Walter. / Anisotropic Hollow Microgels That Can Adapt Their Size, Shape, and Softness. I: Nano Letters. 2019 ; Bind 19, Nr. 11. s. 8161-8170.

Bibtex

@article{93e29f364f1c4912aacaa64422f24521,
title = "Anisotropic Hollow Microgels That Can Adapt Their Size, Shape, and Softness",
abstract = "The development of soft anisotropic building blocks is of great interest for various applications in soft matter. Furthermore, such systems would be important model systems for ordering phenomena in fundamental soft matter science. In this work, we address the challenge of creating hollow and anisotropically shaped thermoresponsive microgels, polymeric networks with a solvent filled cavity in their center that are swollen in a good solvent. Sacrificial elliptical hematite silica particles were utilized as a template for the synthesis of a cross-linked N-isopropylacrylamide (NIPAm) shell. By varying the amount of NIPAm, two anisotropic microgels were synthesized with either a thin or thick microgel shell. We characterized these precursor core-shell and the resulting hollow microgels using a combination of light, X-ray, and neutron scattering. New form factor models, accounting for the cavity, the polymer distribution and the anisotropy, have been developed for fitting the scattering data. With such models, we demonstrated the existence of the cavity and simultaneously the anisotropic character of the microgels. Furthermore, we show that the thickness of the shell has a major influence on the shape and the cavity dimension of the microgel after etching of the sacrificial core. Finally, the effect of temperature is investigated, showing that changes in size, softness, and aspect ratio are triggered by temperature.",
keywords = "anisotropic colloids, anisotropic microgels, Microgels, small-angle neutron scattering, soft matter, thermoresponsive polymer",
author = "Nickel, {Anne C.} and Andrea Scotti and Houston, {Judith E.} and Thiago Ito and J{\'e}r{\^o}me Crassous and Pedersen, {Jan Skov} and Walter Richtering",
year = "2019",
month = nov,
doi = "10.1021/acs.nanolett.9b03507",
language = "English",
volume = "19",
pages = "8161--8170",
journal = "Nano Letters",
issn = "1530-6984",
publisher = "AMER CHEMICAL SOC",
number = "11",

}

RIS

TY - JOUR

T1 - Anisotropic Hollow Microgels That Can Adapt Their Size, Shape, and Softness

AU - Nickel, Anne C.

AU - Scotti, Andrea

AU - Houston, Judith E.

AU - Ito, Thiago

AU - Crassous, Jérôme

AU - Pedersen, Jan Skov

AU - Richtering, Walter

PY - 2019/11

Y1 - 2019/11

N2 - The development of soft anisotropic building blocks is of great interest for various applications in soft matter. Furthermore, such systems would be important model systems for ordering phenomena in fundamental soft matter science. In this work, we address the challenge of creating hollow and anisotropically shaped thermoresponsive microgels, polymeric networks with a solvent filled cavity in their center that are swollen in a good solvent. Sacrificial elliptical hematite silica particles were utilized as a template for the synthesis of a cross-linked N-isopropylacrylamide (NIPAm) shell. By varying the amount of NIPAm, two anisotropic microgels were synthesized with either a thin or thick microgel shell. We characterized these precursor core-shell and the resulting hollow microgels using a combination of light, X-ray, and neutron scattering. New form factor models, accounting for the cavity, the polymer distribution and the anisotropy, have been developed for fitting the scattering data. With such models, we demonstrated the existence of the cavity and simultaneously the anisotropic character of the microgels. Furthermore, we show that the thickness of the shell has a major influence on the shape and the cavity dimension of the microgel after etching of the sacrificial core. Finally, the effect of temperature is investigated, showing that changes in size, softness, and aspect ratio are triggered by temperature.

AB - The development of soft anisotropic building blocks is of great interest for various applications in soft matter. Furthermore, such systems would be important model systems for ordering phenomena in fundamental soft matter science. In this work, we address the challenge of creating hollow and anisotropically shaped thermoresponsive microgels, polymeric networks with a solvent filled cavity in their center that are swollen in a good solvent. Sacrificial elliptical hematite silica particles were utilized as a template for the synthesis of a cross-linked N-isopropylacrylamide (NIPAm) shell. By varying the amount of NIPAm, two anisotropic microgels were synthesized with either a thin or thick microgel shell. We characterized these precursor core-shell and the resulting hollow microgels using a combination of light, X-ray, and neutron scattering. New form factor models, accounting for the cavity, the polymer distribution and the anisotropy, have been developed for fitting the scattering data. With such models, we demonstrated the existence of the cavity and simultaneously the anisotropic character of the microgels. Furthermore, we show that the thickness of the shell has a major influence on the shape and the cavity dimension of the microgel after etching of the sacrificial core. Finally, the effect of temperature is investigated, showing that changes in size, softness, and aspect ratio are triggered by temperature.

KW - anisotropic colloids

KW - anisotropic microgels

KW - Microgels

KW - small-angle neutron scattering

KW - soft matter

KW - thermoresponsive polymer

UR - http://www.scopus.com/inward/record.url?scp=85073869913&partnerID=8YFLogxK

U2 - 10.1021/acs.nanolett.9b03507

DO - 10.1021/acs.nanolett.9b03507

M3 - Letter

C2 - 31613114

AN - SCOPUS:85073869913

VL - 19

SP - 8161

EP - 8170

JO - Nano Letters

JF - Nano Letters

SN - 1530-6984

IS - 11

ER -