Next Article in Journal
Recent Advances in Organic Thermoelectric Materials: Principle Mechanisms and Emerging Carbon-Based Green Energy Materials
Next Article in Special Issue
Upper Critical Solution Temperature (UCST) Behavior of Polystyrene-Based Polyampholytes in Aqueous Solution
Previous Article in Journal
Electrospun Graphene Nanosheet-Filled Poly(Trimethylene Terephthalate) Composite Fibers: Effects of the Graphene Nanosheet Content on Morphologies, Electrical Conductivity, Crystallization Behavior, and Mechanical Properties
Previous Article in Special Issue
Polyelectrolyte Complexation of Oligonucleotides by Charged Hydrophobic—Neutral Hydrophilic Block Copolymers
Open AccessArticle

Layer-by-Layer Assembly and Electrochemical Study of Alizarin Red S-Based Thin Films

1
State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning 116023, China
2
Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USA
3
Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA
*
Authors to whom correspondence should be addressed.
Polymers 2019, 11(1), 165; https://doi.org/10.3390/polym11010165
Received: 4 December 2018 / Revised: 21 December 2018 / Accepted: 2 January 2019 / Published: 18 January 2019
Electroactive organic dyes incorporated in layer-by-layer (LbL) assemblies are of great interest for a variety of applications. In this paper, Alizarin Red S (ARS), an electroactive anthraquinone dye, is employed to construct LbL (BPEI/ARS)n films with branched poly(ethylene imine) (BPEI) as the complementary polymer. Unconventional LbL methods, including co-adsorption of ARS and poly(4-styrene sulfonate) (PSS) with BPEI to assemble (BPEI/(ARS+PSS))n, as well as pre-complexation of ARS with BPEI and further assembly with PSS to fabricate ((BPEI+ARS)/PSS)n, are designed for investigation and comparison. Film growth patterns, UV–Vis spectra and surface morphology of the three types of LbL assemblies are measured and compared to reveal the formation mechanism of the LbL films. Electrochemical properties including cyclic voltammetry and spectroelectrochemistry of (BPEI/ARS)120, (BPEI/(ARS+PSS))120 and ((BPEI+ARS)/PSS)120 films are studied, and the results show a slight color change due to the redox reaction of ARS. ((BPEI+ARS)/PSS)120 shows the best stability among the three samples. It is concluded that the manner of dye- incorporation has a great effect on the electrochemical properties of the resultant films. View Full-Text
Keywords: Alizarin Red S; layer-by-layer assembly; UV–Vis spectrometry; electrochemistry Alizarin Red S; layer-by-layer assembly; UV–Vis spectrometry; electrochemistry
Show Figures

Graphical abstract

MDPI and ACS Style

Ma, W.; Zhang, Y.; Li, F.; Kou, D.; Lutkenhaus, J.L. Layer-by-Layer Assembly and Electrochemical Study of Alizarin Red S-Based Thin Films. Polymers 2019, 11, 165.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map

1
Back to TopTop