Comparison of diamond nanoparticles captured on the floating and grounded membranes in the hot filament chemical vapor deposition process

Kim, Hwan-Young; Kim, Da-Seul; Hwang, Nong‐Moon

doi:10.1039/d0ra09649k

Cited by 9 publications

(7 citation statements)

References 43 publications

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“…A densely arranged interlayer was found at the bottom of the CF/Ta layer (Figure 2f), with only amorphous carbon and crystalline tantalum carbide (Ta 4 C 3.04 ) with a lattice spacing of 0.252 nm (Figure 2g). The d-spacing of 0.218 nm was assigned to the (200) planes of the cubic phase with a lattice parameter of 4.2 Å, agreeing well with the reported (200) spacings by Vora et al 52 and Kim et al 53 This increased d-spacing value, in contrast to the d-spacing of 0.179 nm reported in a pure cubic nanodiamond, 54 implies a (200) lattice expansion, which is possibly attributed to the introduction of the boron atoms that lead to the distortion of the lattice. 55 Meanwhile, the nanometer-sized Ta layer aggregated to form nanometer-sized pinholes, which served as anchored nucleation sites for diamond growth, thereby enhancing the mechanical stability of the electrodes.…”

Section: ■ Results and Discussionsupporting

confidence: 89%

Constructing a Hydrophilic Microsensor for High-Antifouling Neurotransmitter Dopamine Sensing

Li,

Zhang,

Deng

et al. 2024

ACS Sens.

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Real-time sensing of dopamine is essential for understanding its physiological function and clarifying the pathophysiological mechanism of diseases caused by impaired dopamine systems. However, severe fouling from nonspecific protein adsorption, for a long time, limited conventional neural recording electrodes concerning recording stability. This study reported a high-antifouling nanocrystalline boron-doped diamond microsensor grown on a carbon fiber substrate. The antifouling properties of this diamond sensor were strongly related to the grain size (i.e., nanocrystalline and microcrystalline) and surface terminations (i.e., oxygen and hydrogen terminals). Experimental observations and molecular dynamics calculations demonstrated that the oxygen-terminated nanocrystalline boron-doped diamond microsensor exhibited enhanced antifouling characteristics against protein adsorption, which was attributed to the formation of a strong hydration layer as a physical and energetic barrier that prevents protein adsorption on the surface. This finally allowed for in vivo monitoring of dopamine in rat brains upon potassium chloride stimulation, thus presenting a potential solution for the design of next-generation antifouling neural recording sensors. Experimental observations and molecular dynamics calculations demonstrated that the oxygen-terminated nanocrystalline boron-doped diamond (O-NCBDD) microsensor exhibited ultrahydrophilic properties with a contact angle of 4.9°, which was prone to forming a strong hydration layer as a physical and energetic barrier to withstand the adsorption of proteins. The proposed O-NCBDD microsensor exhibited a high detection sensitivity of 5.14 μA μM −1 cm −2 and a low detection limit of 25.7 nM. This finally allowed for in vivo monitoring of dopamine with an average concentration of 1.3 μM in rat brains upon 2 μL of potassium chloride stimulation, thus presenting a potential solution for the design of next-generation antifouling neural recording sensors.

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Section: ■ Results and Discussionsupporting

confidence: 89%

Constructing a Hydrophilic Microsensor for High-Antifouling Neurotransmitter Dopamine Sensing

Li,

Zhang,

Deng

et al. 2024

ACS Sens.

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“…The HF-CVD process developed nanoparticles of diamond, and their structural features were compared. 39…”

Section: Resultsmentioning

confidence: 99%

Structural analyses of carbon films deposited at different total mass rates in a hot-filament CVD system

Ali

2023

Mater. Adv.

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“…Some of the substrates are SiO, graphene membranes of copper TEM grid, and carbon. Different types of allotropes diamonds are identified as hexagonal and cubic diamond, i-carbon, and n-diamond particles [63]. The diamond nanoparticles can characterize using Raman spectroscopy that has a sharp peak around 1332 cm −1 [64].…”

Section: Chemical Vapor Deposition Methods (Cvd)mentioning

confidence: 99%

Nanomaterials: Synthesis and Applications in Theranostics

et al. 2021

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Nanomaterials are endowed with unique features and essential properties suitable for employing in the field of nanomedicine. The nanomaterials can be classified as 0D, 1D, 2D, and 3D based on their dimensions. The nanomaterials can be malleable and ductile and they can be drawn into wires and sheets. Examples of nanomaterials are quantum dots (0D), nanorods, nanowires (1D), nanosheets (2D), and nanocubes (3D). These nanomaterials can be synthesized using top-down and bottom-up approaches. The achievements of 0D and 1D nanomaterials are used to detect trace heavy metal (e.g., Pb2+) and have higher sensitivity with the order of five as compared to conventional sensors. The achievements of 2D and 3D nanomaterials are used as diagnostic and therapeutic agents with multifunctional ability in imaging systems such as PET, SPECT, etc. These imaging modalities can be used to track the drug in living tissues. This review comprises the state-of-the-art of the different dimensions of the nanomaterials employed in theranostics. The nanomaterials with different dimensions have unique physicochemical properties that can be utilized for therapy and diagnosis. The multifunctional ability of the nanomaterials can have a distinct advantage that is used in the field of theranostics. Different dimensions of the nanomaterials would have more scope in the field of nanomedicine.

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Comparison of diamond nanoparticles captured on the floating and grounded membranes in the hot filament chemical vapor deposition process

Abstract: Various carbon allotropes were captured on the floating and grounded membrane.

Cited by 9 publications

References 43 publications

Constructing a Hydrophilic Microsensor for High-Antifouling Neurotransmitter Dopamine Sensing

Constructing a Hydrophilic Microsensor for High-Antifouling Neurotransmitter Dopamine Sensing

Structural analyses of carbon films deposited at different total mass rates in a hot-filament CVD system

Nanomaterials: Synthesis and Applications in Theranostics

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