Journal Article

PUBDB-2016-00169

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Arrangement of Maghemite Nanoparticles via Wet Chemical Self-Assembly in PS- b -PNIPAM Diblock Copolymer Films

Yao, Y. (Corresponding author)>Extern* ; Metwalli, E. ; Su, B. ; Körstgens, V. ; Moseguí González, D. ; Miasnikova, A. ; Laschewsky, A. ; Opel, M. ; Santoro, G. ; Roth, S. V.DESY* ; Müller-Buschbaum, P.

2015
Soc. Washington, DC

This record in other databases:        

Please use a persistent id in citations: doi:10.1021/acsami.5b03308

Abstract: The structure and magnetic behavior of hybrid films composed of maghemite (γ-Fe$_{2}$O$_{3}$) nanoparticles (NPs) and an asymmetric diblock copolymer (DBC) polystyrene$_{61}$-block-polyN-isopropylacrylamide$_{115}$ are investigated. The NPs are coated with PS chains, which allow for a selective incorporation inside the PS domains at different NP concentrations. Upon incorporation of low amounts of NPs into the DBC thin films, the initial parallel (to film surface) cylinder morphology changes to a well ordered, perpendicularly oriented one. The characteristic domain distance of the DBC is increased due to the swelling of the PS domains with NPs. At higher NP concentrations, the excess NPs which can no longer be embedded in the PS domains, are accumulated at the film surface, and NP aggregates form. Irrespective of NP concentration, a superparamagnetic behavior of the metal oxide-DBC hybrid films is found. Such superparamagnetic properties make the established hybrid films interesting for high density magnetic storage media and thermoresponsive magnetic sensors.

Note: (c) American Chemical Society

---

Contributing Institute(s):

1. Experimentebetreuung PETRA III (FS-PE)

Research Program(s):

1. 6214 - Nanoscience and Materials for Information Technology (POF3-621) (POF3-621)
2. 6G3 - PETRA III (POF3-622) (POF3-622)

Experiment(s):

1. PETRA Beamline P03 (PETRA III)

Appears in the scientific report 2015

---

Database coverage:
; ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

---