Details
| Original language | English |
|---|---|
| Pages (from-to) | 6678-6688 |
| Number of pages | 11 |
| Journal | ACS Applied Nano Materials |
| Volume | 4 |
| Issue number | 7 |
| Early online date | 8 Jul 2021 |
| Publication status | Published - 23 Jul 2021 |
Abstract
Macroscopic materials with nanoscopic properties have recently been synthesized by self-assembling defined nanoparticles to form self-supported networks, so-called aerogels. Motivated by the promising properties of this class of materials, the search for versatile routes toward the controlled assembly of presynthesized nanoparticles into such ultralight macroscopic materials has become a great interest. Overcoating procedures of colloidal nanoparticles with polymers offer versatile means to produce aerogels from nanoparticles, regardless of their size, shape, or properties while retaining their original characteristics. Herein, we report on the surface modification and assembly of various building blocks: photoluminescent nanorods, magnetic nanospheres, and plasmonic nanocubes with particle sizes between 5 and 40 nm. The polymer employed for the coating was poly(isobutylene-alt-maleic anhydride) modified with 1-dodecylamine side chains. The amphiphilic character of the polymer facilitates the stability of the nanocrystals in aqueous media. Hydrogels are prepared via triggering the colloidally stable solutions, with aqueous cations acting as linkers between the functional groups of the polymer shell. Upon supercritical drying, the hydrogels are successfully converted into macroscopic aerogels with highly porous, open structure. Due to the noninvasive preparation method, the nanoscopic properties of the building blocks are retained in the monolithic aerogels, leading to the powerful transfer of these properties to the macroscale. The open pore system, the universality of the polymer-coating strategy, and the large accessibility of the network make these gel structures promising biosensing platforms. Functionalizing the polymer shell with biomolecules opens up the possibility to utilize the nanoscopic properties of the building blocks in fluorescent probing, magnetoresistive sensing, and plasmonic-driven thermal sensing.
Keywords
- aerogels, nanoparticles, phase transfer, polymer coating, versatile synthesis method
ASJC Scopus subject areas
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In: ACS Applied Nano Materials, Vol. 4, No. 7, 23.07.2021, p. 6678-6688.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Aerogelation of Polymer-Coated Photoluminescent, Plasmonic, and Magnetic Nanoparticles for Biosensing Applications
AU - Altenschmidt, Laura
AU - Sánchez-Paradinas, Sara
AU - Lübkemann, Franziska
AU - Zámbó, Dániel
AU - Abdelmonem, Abuelmagd M.
AU - Bradtmüller, Henrik
AU - Masood, Atif
AU - Morales, Irene
AU - de la Presa, Patricia
AU - Knebel, Alexander
AU - García García-Tuñón, Miguel Angel
AU - Pelaz, Beatriz
AU - Hindricks, Karen D.J.
AU - Behrens, Peter
AU - Parak, Wolfgang J.
AU - Bigall, Nadja C.
N1 - Funding Information: The authors (L. A., S. S.-P., H. B., F. L., D. Z., and N.C.B.) are grateful for the financial support from the German Federal Ministry of Education and Research (BMBF) within the framework of the program NanoMatFutur (support code 03X5525). Furthermore, the project leading to these results has in part received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (grant agreement no. 714429). The project has in parts been funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy within the Cluster of Excellence PhoenixD (EXC 2122, project ID: 390833453), the Cluster of Excellence AIM (EXC 2056, project ID: 390715994), and the Cluster of Excellence Hearing4all (EXC 1077/1). B.P. thanks Spanish MINECO-AEI/FEDER (no. PID2019-111218RB-I00), the RyC program (grant agreement no. 2017-23457), and the Xunta de Galicia (Centro singular de investigación de Galicia accreditation 2019–2022, no. ED431G 2019/03). The authors thank Prof. Caro and Prof. Feldhoff for access to a scanning electron microscope, Lars Klepzig for help with the nitrogen adsorption measurements, and the Laboratorium of Nano- and Quantum Engineering of the Leibniz Universität Hannover for the support. Furthermore, they would like to thank PD Dr. Carsten Zeilinger for the provision of the ultracentrifuges at the Centre of Biomolecular Drug Research (BMWZ) in Hannover.
PY - 2021/7/23
Y1 - 2021/7/23
N2 - Macroscopic materials with nanoscopic properties have recently been synthesized by self-assembling defined nanoparticles to form self-supported networks, so-called aerogels. Motivated by the promising properties of this class of materials, the search for versatile routes toward the controlled assembly of presynthesized nanoparticles into such ultralight macroscopic materials has become a great interest. Overcoating procedures of colloidal nanoparticles with polymers offer versatile means to produce aerogels from nanoparticles, regardless of their size, shape, or properties while retaining their original characteristics. Herein, we report on the surface modification and assembly of various building blocks: photoluminescent nanorods, magnetic nanospheres, and plasmonic nanocubes with particle sizes between 5 and 40 nm. The polymer employed for the coating was poly(isobutylene-alt-maleic anhydride) modified with 1-dodecylamine side chains. The amphiphilic character of the polymer facilitates the stability of the nanocrystals in aqueous media. Hydrogels are prepared via triggering the colloidally stable solutions, with aqueous cations acting as linkers between the functional groups of the polymer shell. Upon supercritical drying, the hydrogels are successfully converted into macroscopic aerogels with highly porous, open structure. Due to the noninvasive preparation method, the nanoscopic properties of the building blocks are retained in the monolithic aerogels, leading to the powerful transfer of these properties to the macroscale. The open pore system, the universality of the polymer-coating strategy, and the large accessibility of the network make these gel structures promising biosensing platforms. Functionalizing the polymer shell with biomolecules opens up the possibility to utilize the nanoscopic properties of the building blocks in fluorescent probing, magnetoresistive sensing, and plasmonic-driven thermal sensing.
AB - Macroscopic materials with nanoscopic properties have recently been synthesized by self-assembling defined nanoparticles to form self-supported networks, so-called aerogels. Motivated by the promising properties of this class of materials, the search for versatile routes toward the controlled assembly of presynthesized nanoparticles into such ultralight macroscopic materials has become a great interest. Overcoating procedures of colloidal nanoparticles with polymers offer versatile means to produce aerogels from nanoparticles, regardless of their size, shape, or properties while retaining their original characteristics. Herein, we report on the surface modification and assembly of various building blocks: photoluminescent nanorods, magnetic nanospheres, and plasmonic nanocubes with particle sizes between 5 and 40 nm. The polymer employed for the coating was poly(isobutylene-alt-maleic anhydride) modified with 1-dodecylamine side chains. The amphiphilic character of the polymer facilitates the stability of the nanocrystals in aqueous media. Hydrogels are prepared via triggering the colloidally stable solutions, with aqueous cations acting as linkers between the functional groups of the polymer shell. Upon supercritical drying, the hydrogels are successfully converted into macroscopic aerogels with highly porous, open structure. Due to the noninvasive preparation method, the nanoscopic properties of the building blocks are retained in the monolithic aerogels, leading to the powerful transfer of these properties to the macroscale. The open pore system, the universality of the polymer-coating strategy, and the large accessibility of the network make these gel structures promising biosensing platforms. Functionalizing the polymer shell with biomolecules opens up the possibility to utilize the nanoscopic properties of the building blocks in fluorescent probing, magnetoresistive sensing, and plasmonic-driven thermal sensing.
KW - aerogels
KW - nanoparticles
KW - phase transfer
KW - polymer coating
KW - versatile synthesis method
UR - http://www.scopus.com/inward/record.url?scp=85111210025&partnerID=8YFLogxK
U2 - 10.1021/acsanm.1c00636
DO - 10.1021/acsanm.1c00636
M3 - Article
AN - SCOPUS:85111210025
VL - 4
SP - 6678
EP - 6688
JO - ACS Applied Nano Materials
JF - ACS Applied Nano Materials
SN - 2574-0970
IS - 7
ER -