ArticleThe European physical journal. E, Soft matter2013
Characterization of PAH/DPPG layer-by-layer films by VUV spectroscopy.
Article in The European physical journal. E, Soft matter, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 16 citations in OpenAlex.
- Enhancing Veliparib PARP1 inhibitor stability against UVC degradationRSC advances · 2026Article
- Electronic States of Epigallocatechin-3-Gallate in Water and in 1,2-dipalmitoyl-sn-glycero-3-phospho-(1'-rac-glycerol) (Sodium Salt) Liposomes.International journal of molecular sciences · 2025Article
- Liposome Formulations for the Strategic Delivery of PARP1 Inhibitors: Development and Optimization.Nanomaterials (Basel, Switzerland) · 2023Article
- Graphene Oxide Layer-by-Layer Films for Sensors and Devices.Nanomaterials (Basel, Switzerland) · 2021Article
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Authors and funding
8 authors at 4 institutions in 5 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The spectroscopic characterization of layer-by-layer (LbL) films containing liposomes is essential not only for determining the precise film architecture but also to guide the design of drug delivery systems. In this study we provide the first report of vacuum ultraviolet spectroscopy (VUV) characterization of LbL films made with liposomes from 1.2-dipalmitoyl-sn-Glycero-3-[Phospho-rac-(1-glycerol)] (Sodium Salt) (DPPG) alternated with poly(allylamine hydrochloride) (PAH). Measurements in the 6.0-9.5eV range allowed us to identify the electronic transitions responsible for the spectra, which were assigned to carboxyl, hydroxyl and phosphate groups in DPPG while the PAH spectra were governed by electronic transitions in the amino groups. The surface mass density of the LbL films could be determined, from which the formation of a DPPG bilayer was inferred. This rupture of the liposomes into bilayers was confirmed with atomic force microscopy measurements. In subsidiary experiments we ensured that the UV irradiation in vacuum had negligible damage in the DPPG liposomes during the course of the VUV measurements. In addition to demonstrating the usefulness of VUV spectroscopy, the results presented here may be exploited in biological applications of liposome-containing films.
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