Tong, Ciqing; Liu, Tingxian; Saez Talens, Victorio; Noteborn, Willem E. M.; Sharp, Thomas H.; Hendrix, Marco M. R. M.; Voets, Ilja K.; Mummery, Christine L.; Orlova, Valeria V.; Kieltyka, Roxanne E.
Squaramide-Based Supramolecular Materials for Three-Dimensional Cell Culture of Human Induced Pluripotent Stem Cells and Their Derivatives
Synthetic hydrogel materials can recapitulate the natural cell microenvironment; however, it is equally necessary that the gels maintain cell viability and phenotype while permitting reisolation without stress, especially for use in the stem cell field. Here, we describe a family of synthetically accessible, squaramide-based tripodal supramolecular monomers consisting of a…
Langmuir – Blodgett monolayers of SBA-15 particles with different morphologies
Znamenskaya Falk, Yana; Schmitt, Julien; Alfredsson, Viveka
This study presents an optimized protocol for the deposition of mesoporous SBA-15 particles with platelet-like and rod-like morphologies on different types of supporting substrates using Langmuir-Blodgett methodology, resulting in the formation of monolayers with porosity orientation controlled by the type, i. e. the morphology, of particles used over large areas.…
Reverse micelles as nanocarriers of nisin against foodborne pathogens
Chatzidaki, Maria D.; Papadimitriou, Konstantinos; Alexandraki, Voula; Balkiza, Fani; Georgalaki, Marina; Papadimitriou, Vassiliki; Tsakalidou, Effie; Xenakis, Aristotelis
Reverse micelles (RMs) as nanocarriers of nisin were optimized for the highest water and bacteriocin content. RMs formulated with either refined olive oil or sunflower oil, distilled monoglycerides, ethanol, and water were effectively designed. Structural characterization of the RMs was assessed using Electron Paramagnetic Resonance Spectroscopy and Small Angle X-ray…
Seeded Growth Synthesis of Gold Nanotriangles: Size Control, SAXS Analysis, and SERS Performance
Kuttner, Christian; Mayer, Martin; Dulle, Martin; Moscoso, Ana; López-Romero, Juan Manuel; Förster, Stephan; Fery, Andreas; Pérez-Juste, Jorge; Contreras-Cáceres, Rafael
We studied the controlled growth of triangular prismatic Au nanoparticles with different beveled sides for surface-enhanced Raman spectroscopy (SERS) applications. First, in a seedless synthesis using 3-butenoic acid (3BA) and benzyldimethylammonium chloride (BDAC), gold nanotriangles (AuNTs) were synthesized in a mixture with gold nanooctahedra (AuNOCs) and separated by depletion-induced…
Freeze-dried and re-hydrated liquid crystalline nanoparticles stabilized with disaccharides for drug-delivery of the plectasin derivative AP114 antimicrobial peptide
Boge, Lukas; Västberg, Amanda; Umerska, Anita; Bysell, Helena; Eriksson, Jonny; Edwards, Katarina; Millqvist-Fureby, Anna; Andersson, Martin
Liquid crystalline nanoparticles (LCNPs), e.g. cubosomes and hexosomes, are receiving more and more attraction as drug delivery vehicles. Dry powder formulation that forms LCNPs upon hydration can be advantageous to make new routes of administration accessible. In this work, we investigate use of three disaccharides (lactose, trehalose and sucrose) as…
Twisted nanoribbons from a RGD-bearing cholic acid derivative
Travaglini, Leana; Giordano, Cesare; D’Annibale, Andrea; Gubitosi, Marta; di Gregorio, Maria Chiara; Schillén, Karin; Stefanucci, Azzurra; Mollica, Adriano; Pavel, Nicolae Viorel; Galantini, Luciano
In light of the biomedical interest for self-assembling amphiphiles bearing the tripeptide Arg-Gly-Gly (RGD), a cholic acid derivative was synthesized by introducing an aromatic moiety on the steroidal skeleton and the RGD sequence on the carboxylic function of its chain 17–24, thus forming a peptide amphiphile with the unconventional rigid…
Functionalized Triblock Copolymer Vectors for the Treatment of Acute Lymphoblastic Leukemia
Deller, Robert C.; Diamanti, Paraskevi; Morrison, Gabriella; Reilly, James; Ede, Benjamin C.; Richardson, Robert; Le Vay, Kristian; Collins, Andrew M.; Blair, Allison; Perriman, Adam W.
The chemotherapeutic Parthenolide is an exciting new candidate for the treatment of acute lymphoblastic leukemia, but like many other small-molecule drugs, it has low aqueous solubility. As a consequence, Parthenolide can only be administered clinically in the presence of harmful cosolvents. Accordingly, we describe the synthesis, characterization, and testing of…
Using block copolymer architecture to achieve sub-10 nm periods
Sun, Zhiwei; Zhang, Wenxu; Hong, Song; Chen, Zhenbin; Liu, Xiaohui; Xiao, Shuaigang; Coughlin, E. Bryan; Russell, Thomas P.
Using salt-doped polystyrene-b-poly(2-vinylpyridine) star shaped block copolymer as a model, we show that the architecture of (A-b-B)n type multi-arm star block copolymers enhances the ordering of the block copolymers, enabling the generation of nanostructures with microdomain periods less than 10 nm. The influence of the arm number on the order-to-disorder transition…
The UV filtering potential of drop-casted layers of frustules of three diatom species
Su, Yanyan; Lenau, Torben A.; Gundersen, Emil; Kirkensgaard, Jacob J. K.; Maibohm, Christian; Pinti, Jérôme; Ellegaard, Marianne
Diatoms are in focus as biological materials for a range of photonic applications. Many of these applications would require embedding a multitude of diatoms in a matrix (e.g. paint, crème or lacquer); however, most studies on the photonic and spectral properties of diatoms frustules (silica walls) have been carried out…
Photoswitchable Nanomaterials Based on Hierarchically Organized Siloxane Oligomers
Zha, R. Helen; Vantomme, Ghislaine; Berrocal, José Augusto; Gosens, Ronald; Waal, Bas de; Meskers, Stefan; Meijer, E. W.
Materials with highly ordered molecular arrangements have the capacity to display unique properties derived from their nanoscale structure. Here, the synthesis and characterization of azobenzene (AZO)-functionalized siloxane oligomers of discrete length that form photoswitchable supramolecular materials are described. Specifically, synergy between phase segregation and azobenzene crystallization…