Supramolecular Control over the Interparticle Distance in Gold Nanoparticle Arrays by Cyclodextrin Polyrotaxanes

Simple item page
dc.contributor.authorCoelho, Joao Paulo
dc.contributor.authorOsío Barcina, José de Jesús
dc.contributor.authorJunquera González, Elena
dc.contributor.authorAicart Sospedra, Emilio
dc.contributor.authorTardajos Rodríguez, Gloria
dc.contributor.authorGómez Graña, Sergio
dc.contributor.authorCruz Gil, Pablo
dc.contributor.authorSalgado, Cástor
dc.contributor.authorDíaz Núñez, Pablo
dc.contributor.authorPeña Rodríguez, Ovidio
dc.contributor.authorGuerrero Martínez, Andrés
dc.date.accessioned2023-06-17T12:39:39Z
dc.date.available2023-06-17T12:39:39Z
dc.date.issued2018-03-16
dc.description.abstractAmphiphilic nonionic ligands, synthesized with a fixed hydrophobic moiety formed by a thiolated alkyl chain and an aromatic ring, and with a hydrophilic tail composed of a variable number of oxyethylene units, were used to functionalize spherical gold nanoparticles (AuNPs) in water. Steady-state and time-resolved fluorescence measurements of the AuNPs in the presence of α-cyclodextrin (α-CD) revealed the formation of supramolecular complexes between the ligand and macrocycle at the surface of the nanocrystals. The addition of α-CD induced the formation of inclusion complexes with a high apparent binding constant that decreased with the increasing oxyethylene chain length. The formation of polyrotaxanes at the surface of AuNPs, in which many α-CDs are trapped as hosts on the long and linear ligands, was demonstrated by the formation of large and homogeneous arrays of self-assembled AuNPs with hexagonal close packing, where the interparticle distance increased with the length of the oxyethylene chain. The estimated number of α-CDs per polyrotaxane suggests a high rigidization of the ligand upon complexation, allowing for nearly perfect control of the interparticle distance in the arrays. This degree of supramolecular control was extended to arrays formed by AuNPs stabilized with polyethylene glycol and even to binary arrays. Electromagnetic simulations showed that the enhancement and distribution of the electric field can be finely controlled in these plasmonic arrays.
dc.description.departmentDepto. de Química en Ciencias Farmacéuticas
dc.description.departmentDepto. de Química Física
dc.description.departmentDepto. de Química Orgánica
dc.description.facultyFac. de Farmacia
dc.description.facultyFac. de Ciencias Químicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Economía y Competitividad (MINECO)
dc.description.sponsorshipComunidad de Madrid
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/69369
dc.identifier.doi10.3390/nano8030168
dc.identifier.issn2079-4991
dc.identifier.officialurlhttps://doi.org/10.3390/nano8030168
dc.identifier.relatedurlhttps://www.mdpi.com/2079-4991/8/3/168
dc.identifier.urihttps://hdl.handle.net/20.500.14352/12724
dc.issue.number3
dc.journal.titleNanomaterials
dc.language.isoeng
dc.page.initial168
dc.publisherMDPI
dc.relation.projectID(MAT2014-59678-R; CTQ2015-65972-R)
dc.relation.projectIDNANOBIOSOMA (S2013/MIT-2807); DIMMAT-CM (S2013/MIT-2775)
dc.rightsAtribución 3.0 España
dc.rights.accessRightsopen access
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/es/
dc.subject.cdu547
dc.subject.keywordsupramolecular chemistry
dc.subject.keywordself-assembly
dc.subject.keywordgold nanoparticle
dc.subject.keywordcyclodextrin
dc.subject.keywordpolyrotaxane
dc.subject.keywordarray
dc.subject.keywordhot spot
dc.subject.keywordsurface-enhanced spectroscopy
dc.subject.ucmQuímica farmaceútica
dc.subject.ucmQuímica orgánica (Farmacia)
dc.subject.unesco2390 Química Farmacéutica
dc.titleSupramolecular Control over the Interparticle Distance in Gold Nanoparticle Arrays by Cyclodextrin Polyrotaxanes
dc.typejournal article
dc.volume.number8
dspace.entity.typePublication
relation.isAuthorOfPublication56e24a94-c784-43f3-8f0b-19917deee155
relation.isAuthorOfPublicationd34d9a95-85dd-4071-ab2c-71a22cf3ceae
relation.isAuthorOfPublication22761001-a3ad-4b9e-b47f-bfd3ba5f8a57
relation.isAuthorOfPublication.latestForDiscovery56e24a94-c784-43f3-8f0b-19917deee155
Download
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
nanomaterials-08-00168.pdf
Size:
7.12 MB
Format:
Adobe Portable Document Format
downoload Download
Collections
Artículos