Boron Doped Ultrananocrystalline Diamond Films on Porous Silicon: Morphological, Structural and Electrochemical Characterizations

Silva, Lilian M.; Santos, Marta dos; Baldan, Maurício Ribeiro; Beloto, A.F.; Ferreira, N.G.

doi:10.1590/1516-1439.002715

Cited by 9 publications

(2 citation statements)

References 27 publications

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“…The bottom-up overgrowth methods make use of a nanostructured template, over which the diamond is grown. These templates include silicon nanowires ( Gao et al, 2015 ; Gund et al, 2015 ), porous silicon ( Ferreira et al, 2005 ; Silva et al, 2015 ), ‘black’ silicon ( May et al, 2016 ), silica fibers ( Petrák et al, 2017 ; Vlčková Živcová et al, 2018 ), silica nanospheres ( Gao et al, 2014 ), anodized aluminum oxide (AAO) ( Masuda et al, 2001 ; Aramesh et al, 2014 ), and quartz fibers ( Kondo et al, 2009 ). The annealing method applies a high temperature to the diamond in vacuum or an atmosphere of air, pure oxygen, or steam.…”

Section: Current Experimental Progress Of Diamond Supercapacitorsmentioning

confidence: 99%

Diamond Supercapacitors: Towards Durable, Safe, and Biocompatible Aqueous-Based Energy Storage

et al. 2022

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Durable and safe energy storage is required for the next generation of miniature bioelectronic devices, in which aqueous electrolytes are preferred due to the advantages in safety, low cost, and high conductivity. While rechargeable aqueous batteries are among the primary choices with relatively low power requirements, their lifetime is generally limited to a few thousand charging/discharging cycles as the electrode material can degrade due to electrochemical reactions. Electrical double layer capacitors (EDLCs) possess increased cycling stability and power density, although with as-yet lower energy density, due to quick electrical adsorption and desorption of ions without involving chemical reactions. However, in aqueous solution, chemical reactions which cause electrode degradation and produce hazardous species can occur when the voltage is increased beyond its operation window to improve the energy density. Diamond is a durable and biocompatible electrode material for supercapacitors, while at the same time provides a larger voltage window in biological environments. For applications requiring higher energy density, diamond-based pseudocapacitors (PCs) have also been developed, which combine EDLCs with fast electrochemical reactions. Here we inspect the properties of diamond-related materials and discuss their advantages and disadvantages when used as EDLC and PC materials. We argue that further optimization of the diamond surface chemistry and morphology, guided by computational modelling of the interface, can lead to supercapacitors with enhanced performance. We envisage that such diamond-based supercapacitors could be used in a wide range of applications and in particular those requiring high performance in biomedical applications.

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Section: Current Experimental Progress Of Diamond Supercapacitorsmentioning

confidence: 99%

Diamond Supercapacitors: Towards Durable, Safe, and Biocompatible Aqueous-Based Energy Storage

et al. 2022

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“…The main technique used for the deposition of a boron-doped diamond (BDD) film on a conductive substrate is hot filament (HFCVD) or microwave plasma-assisted chemical vapor deposition (MPCVD). The current bottom-up methods focus on overgrown CVD-BDD films on already porous substrates, at moderate temperatures (450−600 °C), such as SiO 2 nanofibers 8 and microspheres, 9 porous silicon substrate, 10 carbon nanotubes, 11 and copper and tungsten foams. 12 On the other hand, the main strategy of top-down methods is to use reactive ions or radicals to promote the surface etching of a BDD film.…”

Section: ■ Introductionmentioning

confidence: 99%

Generation of Nanoporous Diamond Electrodes Fabricated by a Low-Cost Process at Moderate Temperatures

Pfeifer

Szabó

Potocký

et al. 2023

ACS Appl. Eng. Mater.

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A unique approach to fabricate nanoporous diamond morphology using molten salt thermal etching (MSTE) at a moderate temperature (450 °C) of boron-doped ultrananocrystalline diamond (B-UNCD) electrodes is presented. The developed one-step method is simple, environmentally friendly, inexpensive, and provides nanoporous diamond electrodes with nearly unlimited Z-depths. Moreover, it is also applicable to non-conductive diamond films. The appropriate etching mechanism is attributed to the preferential etching of sp 2 carbon phases localized at the grain boundaries by MSTE-generated highly oxidizing species. The fabricated B-UNCD electrodes show an increase in the electrochemical active area (ECSA) of 15% after 3 h of the MSTE treatment, making them promising materials to use as sensors for electroactive species. Such nanoporous B-UNCD presents a favorable working electrode with increased sensitivity for the electrochemical detection of 4nitrophenol. Moreover, the fabricated nanoporous B-UNCD electrode showed 49 times higher capacitance (3534 μF cm −2 ) than the pristine (non-porous) B-UNCD material (71.50 μF cm −2 ).

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Preparation of macro-porous 3D boron-doped diamond electrode with surface micro structure regulation to enhance electrochemical degradation performance

Miao

Chen

et al. 2022

Chemical Engineering Journal

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Boron Doped Ultrananocrystalline Diamond Films on Porous Silicon: Morphological, Structural and Electrochemical Characterizations

Cited by 9 publications

References 27 publications

Diamond Supercapacitors: Towards Durable, Safe, and Biocompatible Aqueous-Based Energy Storage

Diamond Supercapacitors: Towards Durable, Safe, and Biocompatible Aqueous-Based Energy Storage

Generation of Nanoporous Diamond Electrodes Fabricated by a Low-Cost Process at Moderate Temperatures

Preparation of macro-porous 3D boron-doped diamond electrode with surface micro structure regulation to enhance electrochemical degradation performance

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