Structure Evolution and Thermoelectric Properties of Carbonized Polydopamine Thin Films

Li, Haoqi; Aulin, Yaroslav V.; Frazer, Laszlo; Borguet, Eric; Kakodkar, Rohit R.; Feser, Joseph P.; Chen, Yan; An, Ke; Dikin, Dmitriy A.; Ren, Fei

doi:10.1021/acsami.6b15601

Cited by 82 publications

(55 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Raman spectroscopy was performed to study the structure and electronic properties of the C-PDA nanosheet ( Figure 3a). The two peaks, one at approximately 1380 cm −1 and the other at 1590 cm −1 , were assigned to the D (disordered carbon) and G bands (graphitic carbon), respectively [38,39,48]. It is worthwhile to note that the intensity ratio of the D and G bands, ID/IG, in the PDA film was 0.69, which is significantly low.…”

Section: Raman and Xpsmentioning

confidence: 92%

“…Because of the complexity of the oxidative self-polymerization of dopamine, the chemical disorder model has been preferentially used in recent studies to describe PDA [39,46,47]. However, after calcination, the C-PDA has been proposed as nitrogen-rich carbon nanosheets [40,48] using the semiconductor model. In addition, the C-PDA film can be easily transferred to arbitrary substrates (e.g., Si wafer) by employing polymethylmethacrylate (PMMA), thus presenting a significant benefit over CVD-graphene.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Biopolymer-Inspired N-Doped Nanocarbon Using Carbonized Polydopamine: A High-Performance Electrocatalyst for Hydrogen-Evolution Reaction

2020

View full text Add to dashboard Cite

Hydrogen-evolution reaction (HER) is a promising technology for renewable energy conversion and storage. Electrochemical HER can provide a cost-effective method for the clean production of hydrogen. In this study, a biomimetic eco-friendly approach to fabricate nitrogen-doped carbon nanosheets, exhibiting a high HER performance, and using a carbonized polydopamine (C-PDA), is described. As a biopolymer, polydopamine (PDA) exhibits high biocompatibility and can be easily obtained by an environmentally benign green synthesis with dopamine. Inspired by the polymerization of dopamine, we have devised the facile synthesis of nitrogen-doped nanocarbons using a carbonized polydopamine for the HER in acidic media. The N-doped nanocarbons exhibit excellent performance for H 2 generation. The required overpotential at 5 mA/cm 2 is 130 mV, and the Tafel slope is 45 mV/decade. Experimental characterizations confirm that the excellent performance of the N-doped nanocarbons can be attributed to the multisite nitrogen doping, while theoretical computations indicate the promotion effect of tertiary/aromatic nitrogen doping in enhancing the spin density of the doped samples and consequently in forming highly electroactive sites for HER applications.Polymers 2020, 12, 912 2 of 12 candidates has not been reported to date. Clearly, the HER performance of carbon materials is not comparable to that of metal-based catalysts and does not presently conform to the benchmarks [31,35] established by metal-based catalysts. In addition, previously reported carbon-based electrocatalysts still exhibit several limitations during the synthesis process. For example, the synthesis of CVD-graphene-based catalysts is significantly expensive and requires multiple gas sources with particular pressure control and multiple transfer processes after the synthesis [34]. (Reduced) graphene oxide-based catalysts are a satisfactory alternative to CVD-graphene-based catalysts; however, their synthesis is time-consuming, toxic, and highly exothermal [36,37]. Furthermore, carbon sources exert a significant influence on the preparation process and the (electro)chemical properties of the resultant electrocatalyst. Among the potential candidates, polydopamine (PDA) has emerged as a new carbon precursor in recent years [28,[38][39][40][41]. PDA is the self-polymerized product of dopamine, which can be synthesized under mild aqueous conditions simulating marine conditions. Due to the presence of catechol groups, the resultant PDA exhibits strong adhesion to bulk substrates or organic and inorganic materials. Therefore, the PDA does not only serve as the functional layer for many applications [42][43][44] but is also a promising carbon source for the preparation of carbon-based materials. So far, although the structure of the PDA is still under debate, carbonized PDA (C-PDA) has been utilized as nitrogen-doped graphite [40,42].In this study, we demonstrate that through a variety of chemical doping processes-active sites for the HER-can be generated in the C-PDA. Furthe...

show abstract

Section: Raman and Xpsmentioning

confidence: 92%

mentioning

confidence: 99%

Biopolymer-Inspired N-Doped Nanocarbon Using Carbonized Polydopamine: A High-Performance Electrocatalyst for Hydrogen-Evolution Reaction

2020

View full text Add to dashboard Cite

show abstract

“…The PDA/PET fabrics show a similar XRD pattern, indicating that the PDA coating has little influence on the crystalline structure of PET fabrics (Figure 8b). This is mainly due to the amorphous structure of PDA formed on the surface of PET fabrics during the self-polymerization process [29]. Apart from the peaks of PET fabrics, the signals of Ag are observed in the diffraction pattern of the Ag/PDA/PET fabrics as shown in Figure 8c.…”

Section: Xrd Patternmentioning

confidence: 93%

Ag NPs-Assisted Synthesis of Stable Cu NPs on PET Fabrics for Antibacterial and Electromagnetic Shielding Performance

Wang

Zhang

et al. 2020

Polymers

View full text Add to dashboard Cite

In this study, Cu/Ag/polydopamine (PDA)/polyester (PET) fabrics were fabricated for multi-functional textiles. The PET fabrics were firstly modified by dopamine to form a polydopamine (PDA) layer on the fiber surface, then Ag nanoparticles (Ag NPs) were anchored on fiber surface through chelation between PDA and Ag+ ions, and the Ag NPs were further used as catalytic seeds for in situ reduction of Cu nanoparticles (Cu NPs). The surface morphology, chemistry, and crystalline structure of the prepared PET fabrics were characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD). As expected, Cu NPs were evenly dispersed on the surface of fibers. The Cu/Ag/PDA/PET fabrics showed good antibacterial property against Escherichia coli and exhibited excellent electromagnetic interference (EMI) shielding ability. The Cu/Ag/PDA/PET fabrics with high performance antibacterial and EMI shielding properties can be applied as functional protective textiles.

show abstract

“…Previously, it was found that the graphitization of the PDA gives rise to molecular reorganization through additional covalent conjugations between PDA building blocks, culminating eventually in increased crystallinity 26,29 . To closely examine this in PDA and LAPDA films, matrix-assisted laser desorption/ionization time of flight (MALDI-TOF) mass spectrometry was employed.…”

Section: Shown Inmentioning

confidence: 99%

Laser-induced graphitization of polydopamine leads to enhanced mechanical performance while preserving multifunctionality

et al. 2020

View full text Add to dashboard Cite

Polydopamine (PDA) is a simple and versatile conformal coating material that has been proposed for a variety of uses; however in practice its performance is often hindered by poor mechanical properties and high roughness. Here, we show that blue-diode laser annealing dramatically improves mechanical performance and reduces roughness of PDA coatings. Laser-annealed PDA (LAPDA) was shown to be >100-fold more scratch resistant than pristine PDA and even better than hard inorganic substrates, which we attribute to partial graphitization and covalent coupling between PDA subunits during annealing. Moreover, laser annealing provides these benefits while preserving other attractive properties of PDA, as demonstrated by the superior biofouling resistance of antifouling polymer-grafted LAPDA compared to PDA modified with the same polymer. Our work suggests that laser annealing may allow the use of PDA in mechanically demanding applications previously considered inaccessible, without sacrificing the functional versatility that is so characteristic of PDA.

show abstract

Structure Evolution and Thermoelectric Properties of Carbonized Polydopamine Thin Films

Cited by 82 publications

References 31 publications

Biopolymer-Inspired N-Doped Nanocarbon Using Carbonized Polydopamine: A High-Performance Electrocatalyst for Hydrogen-Evolution Reaction

Biopolymer-Inspired N-Doped Nanocarbon Using Carbonized Polydopamine: A High-Performance Electrocatalyst for Hydrogen-Evolution Reaction

Ag NPs-Assisted Synthesis of Stable Cu NPs on PET Fabrics for Antibacterial and Electromagnetic Shielding Performance

Laser-induced graphitization of polydopamine leads to enhanced mechanical performance while preserving multifunctionality

Contact Info

Product

Resources

About