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Formation and Characterization of Air-Stable Lipid Bilayer Membranes Incorporated With Phthalocyanine Molecules

Formation and Characterization of Air-Stable Lipid Bilayer Membranes Incorporated With Phthalocyanine Molecules

Xingyao Feng, Teng Ma, Daichi Yamaura, Daisuke Tadaki, Ayumi Hirano-Iwata

J Phys Chem B. 2019 Aug 1;123(30):6515-6520.

PMID: 31280566

Abstract:

Bilayer lipid membranes (BLMs) are used as basic frameworks for biosensors and biohybrid devices due to their unique properties, which include ultrathin thickness, ultrahigh resistivity, and self-assembling ability. However, BLMs can only form and maintain their structure in aqueous environments, which pose significant limitations to their use. In this work, we report on the formation of highly uniform hybrid BLMs at a water/air interface through self-assembly by simply doping the BLMs with a functional organic molecule, copper(II) 2,9,16,23-tetra-tert-butyl-29H,31H-phthalocyanine (CuPc). By transferring the membrane onto substrates, we were able to produce stable hybrid BLMs under anhydrous conditions. Atomic force microscopy and X-ray diffraction measurements confirmed that the hybrid membranes were composed of single, highly uniform BLMs or stacks of BLMs. Fluorescence resonance energy transfer measurements indicated that the CuPc molecules were located between the hydrophobic tails of lipid molecules, forming a sandwich structure in the hybrid membranes. The hybrid BLMs fabricated by this method substantially expand the range of applications of BLMs to solid-state devices.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP35984931	2,9,16,23-Tetra-tert-butyl-29H,31H-phthalocyanine		35984-93-1	Price
AP39001644	Copper(II) 2,9,16,23-tetra-tert-butyl-29H,31H-phthalocyanine		39001-64-4	Price

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