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Material-Independent Surface Chemistry beyond Polydopamine Coating

Title
Material-Independent Surface Chemistry beyond Polydopamine Coating
Authors
Lee, Haesung A.Ma, YanfeiZhou, FengHong, SeonkiLee, Haeshin
DGIST Authors
Hong, Seonki
Issue Date
2019-03
Citation
Accounts of Chemical Research, 52(3), 704-713
Type
Article
Article Type
Article
Keyword
INITIATED POLYMERIZATION; SELF-POLYMERIZATION; OXIDE SURFACES; CROSS-LINKING; DOPAMINE; CATECHOL; POLYMERS; ADHESIVE; FUNCTIONALIZATION; GRADIENTS
ISSN
0001-4842
Abstract
ConspectusVarious methods have been developed in surface chemistry to control interface properties of a solid material. A selection rule among surface chemistries is compatibility between a surface functionalization tool and a target material. For example, alkanethiol deposition on noble metal surfaces, widely known as the formation of a self-assembled monolayer (SAM), cannot be performed on oxide material surfaces. One must choose organosilane molecules to functionalize oxide surfaces. Thus, the surface chemistry strictly depends on the properties of the surface. Polydopamine coating is now generally accepted as the first toolbox for functionalization of virtually any material surface. Layer-by-layer (LbL) assembly is a widely used method to modify properties of versatile surfaces, including organic materials, metal oxides, and noble metals, along with polydopamine coating. On flat solid substrates, the two chemistries of polydopamine coating and LbL assembly provide similar levels of surface modifications. However, there are additional distinct features in polydopamine. First, polydopamine coating is effective for two- or three-dimensional porous materials such as metal-organic frameworks (MOFs), synthetic polyolefin membranes, and others because small-sized dopamine (MW = 153.18 u) and its oxidized oligomers are readily attached onto narrow-spaced surfaces without exhibiting steric hindrance. In contrast, polymers used in LbL assembly are slow in diffusion because of steric hindrance due to their high molecular weight. Second, it is applicable to structurally nonflat surfaces showing special wettability such as superhydrophobicity or superoleophobicity. Third, a nonconducting, insulating polydopamine layer can be converted to be a conducting layer by pyrolysis. The product after pyrolysis is a N-doped graphene-like material that is useful for graphene or carbon nanotube-containing composites. Fourth, it is a suitable method for engineering the surface properties of various composite materials. The surface properties of participating components in composite materials can be unified by polydopamine coating with a simple one-step process. Fifth, a polydopamine layer exhibits intrinsic chemical reactivity by the presence of catecholquinone moieties and catechol radical species on surfaces. Nucleophiles such as amine and thiolate spontaneously react with the functionalized layer.Applications of polydopamine coating are exponentially growing and include cell culture/patterning, microfluidics, antimicrobial surfaces, tissue engineering, drug delivery systems, photothermal therapy, immobilization of photocatalysts, Li-ion battery membranes, Li-sulfur battery cathode materials, oil/water separation, water detoxification, organocatalysts, membrane separation technologies, carbonization, and others. In this Account, we describe various polydopamine coating methods and then introduce a number of chemical derivatives of dopamine that will open further development of material-independent surface chemistry. © 2019 American Chemical Society.
URI
http://hdl.handle.net/20.500.11750/9735
DOI
10.1021/acs.accounts.8b00583
Publisher
American Chemical Society
Related Researcher
  • Author Hong, Seonki Biomaterials & Biointerface Engineering Laboratory
  • Research Interests
Files:
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Collection:
Department of Emerging Materials ScienceBiomaterials & Biointerface Engineering Laboratory1. Journal Articles


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