Enhanced electrochemical capacitance of nitrogen-doped ultrananocrystalline diamond through oxygen treatment

Falahatdoost, Samira; Chambers, Andre; Stacey, Alastair; Hashem, Hassan N. Al; Nadarajah, Arunan; Prawer, S.; Ahnood, Arman

doi:10.1016/j.apsusc.2020.148768

Cited by 12 publications

(18 citation statements)

References 46 publications

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“…This suggests diamond EDLCs are best suited for small-scale, high-power electronic applications ( Gao and Nebel, 2016 ), such as radiofrequency identification, wireless sensors, or biomedical implants ( Gao et al, 2014 ; Siuzdak and Bogdanowicz, 2018 ; Wang et al, 2020a ). Biomedical applications are also suggested by the diamond electrode’s ability to operate in physiological solution ( Garrett et al, 2012 ; Falahatdoost et al, 2021 ). This approach has previously been demonstrated with other materials and could be used to power small biomedical devices within the body ( Chae et al, 2017 ; Raravikar et al, 2017 ; Sim et al, 2018 ).…”

Section: Discussionmentioning

confidence: 99%

“…While diamond is not yet widely employed due to the relatively high cost and difficulty in processing ( Siuzdak and Bogdanowicz, 2018 ; Yu et al, 2021 ), it nevertheless has attracted interest for its wide potential window and other excellent properties. For example, diamond is durable and biocompatible, making it suitable for long-term biomedical applications such as high capacitance neural interfaces ( Hébert et al, 2014 ; Garrett et al, 2016 ; Tong et al, 2016 ; Siuzdak and Bogdanowicz, 2018 ; Wang et al, 2020a ; Falahatdoost et al, 2021 ). Diamond also possesses high resistance to biofouling ( Trouillon and O’Hare, 2010 ), and has demonstrated high capacitance in saline solution ( Falahatdoost et al, 2021 ).…”

Section: Supercapacitors and The Allure Of Diamondmentioning

confidence: 99%

“…For example, diamond is durable and biocompatible, making it suitable for long-term biomedical applications such as high capacitance neural interfaces ( Hébert et al, 2014 ; Garrett et al, 2016 ; Tong et al, 2016 ; Siuzdak and Bogdanowicz, 2018 ; Wang et al, 2020a ; Falahatdoost et al, 2021 ). Diamond also possesses high resistance to biofouling ( Trouillon and O’Hare, 2010 ), and has demonstrated high capacitance in saline solution ( Falahatdoost et al, 2021 ). Moreover, diamond is stable in corrosive chemicals such as nitric or sulfuric acid ( Hoffmann et al, 2010 ), and is resistant to degradation through electrochemical oxidation in contrast to other sp 2 carbon materials ( Castanheira et al, 2014 ; Gao and Nebel, 2016 ).…”

Section: Supercapacitors and The Allure Of Diamondmentioning

confidence: 99%

“…The annealing method applies a high temperature to the diamond in vacuum or an atmosphere of air, pure oxygen, or steam. This has been used to produce onion-like carbon ( Portet et al, 2007 ), or roughened diamond from the etching of graphitic grain boundaries ( Ohashi et al, 2011 ; Kondo et al, 2014 ; Falahatdoost et al, 2021 ). The selective etching of diamond composite materials grows diamond embedded in a matrix of sacrificial material such as silicon carbide, which is then removed by a wet chemical etch ( Zhuang et al, 2015 ; Yu et al, 2017 ).…”

Section: Current Experimental Progress Of Diamond Supercapacitorsmentioning

confidence: 99%

“…For instance, hydrogen terminated diamond causes upward band bending at the surface so that the valence band overlaps with the energy distribution of the oxygen redox couple, increasing the Faradaic reaction rate and producing surface hole conductivity ( Chakrapani et al, 2007 ). On the other hand, oxygen terminated diamond exhibits less band bending and so overlaps less with the energy levels of redox species, leading to lower reactivity and greater capacitive behavior ( Chakrapani et al, 2007 ; Chambers et al, 2020 ; Falahatdoost et al, 2021 ). This has important implications for diamond composite pseudocapacitors in particular, where the surface chemistry is thought to play a major role in their operational stability ( Kovalenko et al, 2010 ; Yang et al, 2016 ).…”

Section: Current Experimental Progress Of Diamond Supercapacitorsmentioning

confidence: 99%

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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: Discussionmentioning

confidence: 99%

Section: Supercapacitors and The Allure Of Diamondmentioning

confidence: 99%

Section: Supercapacitors and The Allure Of Diamondmentioning

confidence: 99%

Section: Current Experimental Progress Of Diamond Supercapacitorsmentioning

confidence: 99%

Section: Current Experimental Progress Of Diamond Supercapacitorsmentioning

confidence: 99%

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

et al. 2022

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Corrosion‐Resistive and Low Specific Contact Resistance Ohmic Contacts to Semiconducting Diamonds Using Nanocarbon Electrodes

Valappil

Zkria

Ohmagari

et al. 2023

Physica Status Solidi (a)

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The realization of diamond‐based advanced devices is interrelated with the fabrication of practical ohmic contacts. Contrary to boron‐doped, the phosphorus‐doped diamonds with interface carbide forming Ti‐based conventional ohmic contacts find their limitation in device fabrication due to the high contact resistance. Herein, nanocarbon ohmic contacts are deposited by a coaxial arc plasma gun on semiconducting diamonds, and their composite structure which facilitates exceptional contact properties is explored. A comparative electrical characterization between nanocarbon ohmic contacts and conventional Ti‐based contacts is performed on a heavily phosphorus‐doped diamond, and they exhibited one‐order declination in specific contact resistance. In addition to the low contact resistance, an ideal ohmic electrode is preferable to have good mechanical adhesion and corrosion resistance for device applications. The contact behavior of n‐type diamond/nanocarbon against an extremely corrosive environment realized by boiling H2SO4 + HNO3 solution is analyzed. The nanocarbon ohmic contacts exhibit excellent corrosion resistance and mechanical adhesion over conventional Ti‐based contacts. A similar trend is also observed for nanocarbon contacts on boron‐doped diamonds. The modest effect on the transfer length of the nanocarbon contacts with respect to acid treatment sessions indicates a tightly bonded diamond/nanocarbon interface and actively suggests their application in highly‐corrosive and harsh environments.

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Surface‐Mediated Charge Transfer of Photogenerated Carriers in Diamond

Chemin,

Levine,

Rusu

et al. 2023

Small Methods

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Solvated electrons are highly reductive chemical species whose chemical properties remain largely unknown. Diamond materials are proposed as a promising emitter of solvated electrons and visible light excitation would enable solar‐driven CO2 or N2 reductions reactions in aqueous medium. But sub‐bandgap excitation remains challenging. In this work, the role of surface states on diamond materials for charge separation and emission in both gaseous and aqueous environments from deep UV to visible light excitation is elucidated. Four different X‐ray and UV–vis spectroscopy methods are applied to diamond materials with different surface termination, doping and crystallinity. Surface states are found to dominate sub‐bandgap charge transfer. However, the surface charge separation is drastically reduced for boron‐doped diamond due to a very high density of bulk defects. In a gaseous atmosphere, the oxidized diamond surface maintains a negative electron affinity, allowing charge emission, due to remaining hydrogenated and hydroxylated groups. In an aqueous electrolyte, a photocurrent for illumination down to 3.5 eV is observed for boron‐doped nanostructured diamond, independent of the surface termination. This study opens new perspectives on photo‐induced interfacial charge transfer processes from metal‐free semiconductors such as diamonds.

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Enhanced electrochemical capacitance of nitrogen-doped ultrananocrystalline diamond through oxygen treatment

Cited by 12 publications

References 46 publications

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

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

Corrosion‐Resistive and Low Specific Contact Resistance Ohmic Contacts to Semiconducting Diamonds Using Nanocarbon Electrodes

Surface‐Mediated Charge Transfer of Photogenerated Carriers in Diamond

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