Evolution of nanodiamond seeds during the chemical vapor deposition of diamond on silicon substrates in oxygen-rich plasmas

Giussani, A.; Janssens, Stoffel D.; Vázquez-Cortés, David; Fried, Eliot

doi:10.1016/j.apsusc.2021.152103

Cited by 14 publications

(14 citation statements)

References 92 publications

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Section: Resultsmentioning

confidence: 64%

“…For polycrystalline diamond deposition on seeded substrates under harsh conditions, we previously showed that incubation is present due to seed etching. 8 However, under mild conditions similar to those used in this work, incubation has never been corroborated (to the best of our knowledge). 47,48 Quantitative results are obtained by non-linear least-square tting of ( 15) with the values v d = 0.6 nm min −1 , n p = 2.41, n g = 1, and l 0 = 532 nm and tting parameters n 2D , a 0 , and V 0 .…”

Section: Experimental Verication Of the Modelmentioning

confidence: 64%

“…5 Due to high activation energies associated with the nucleation of diamond grains on foreign substrates, relative to those of diamond deposition, incubation periods preceding deposition are observed. [6][7][8] Such incubation periods can be reduced signicantly, or even eliminated entirely, by seeding diamond nanoparticles, typically detonation nanodiamonds, on substrates before deposition. 9 Still, the seeding step does not prevent incubation under certain deposition conditions.…”

Section: Motivation and Goalsmentioning

confidence: 99%

“…9 Still, the seeding step does not prevent incubation under certain deposition conditions. 8,10,11 Incubation can be related to the etching of seeds, 2 which affects the seed density. Consequently, the morphological features of films and the physical properties such as thermal conductivity, transparency, and adhesiveness are also affected.…”

Section: Introductionmentioning

confidence: 99%

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Early stages of polycrystalline diamond deposition: laser reflectance at substrates with growing nanodiamonds

et al. 2023

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Section: Resultsmentioning

confidence: 64%

Section: Experimental Verication Of the Modelmentioning

confidence: 64%

Section: Motivation and Goalsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Early stages of polycrystalline diamond deposition: laser reflectance at substrates with growing nanodiamonds

et al. 2023

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“…Hydrogen is converted into atomic hydrogen that has a preferential etching for sp 2 bonded carbon enabling faster growth of better quality diamond material and also provides the abstraction of hydrogen from growth surface exposing dangling bonds for the maintenance of growth process 13 . Other process gases are also studied for different purposes, nitrogen for example is known to provide better growth rates for [100] oriented diamond films and single crystals 23 , oxygen is often used as a strategy to enhance quality of the crystals [24][25][26] .…”

Section: Introductionmentioning

confidence: 99%

Growth and Characterization of Polycrystalline CVD Diamond Films Obtained by MWPACVD at High Power 2,45GHz Microwave Discharge

et al. 2022

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Among all the allotropic forms of carbon, diamond has attracted a broad scientific and technological interest for its extreme and unique properties rarely matched by other materials in nature. In a rapid rise from a technological point of view, much has been achieved in the study of obtaining this material through CVD technique. Studies of CVD diamond growth parameters of monocrystalline structure, underway in the team, are very expensive and time-consuming requiring in-depth studies of CVD diamond growth parameters of polycrystalline structure. So, this work presents an analysis focused on obtaining CVD diamond films with polycrystalline structure through the 2.45 GHz microwave plasma activation method (MWPACVD) in high power regime using a modified substrate holder to find a set of parameters appropriated for getting uniform quality and growth rate of thick films. The films were characterized using Raman scattering spectroscopy and scanning electron microscopy. The results point to optimized conditions for depositing films with growth rates of up to 20 µm/h with low levels of intrinsic stress, good structural quality and uniform microcrystalline morphology along the deposition surface.

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Fluorescent Nanocarbons: From Synthesis and Structure to Cancer Imaging and Therapy

Ghasemlou,

PN,

Alexander

et al. 2024

Advanced Materials

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Nanocarbons are emerging at the forefront of nanoscience, with diverse carbon nanoforms emerging over the last two decades. Early cancer diagnosis and therapy, driven by advanced chemistry techniques, play a pivotal role in mitigating mortality rates associated with cancer. Nanocarbons, with an attractive combination of well‐defined architectures, biocompatibility, and nanoscale dimension, offer an incredibly versatile platform for cancer imaging and therapy. This paper aims to review the underlying principles regarding the controllable synthesis, fluorescence origins, cellular toxicity, and surface functionalization routes of several classes of nanocarbons: carbon nanodots, nanodiamonds, carbon nanoonions, and carbon nanohorns. This review also highlights recent breakthroughs regarding the green synthesis of different nanocarbons from renewable sources. It also presents a comprehensive and unified overview of the latest cancer‐related applications of nanocarbons and how they could be designed to interface with biological systems and work as cancer diagnostics and therapeutic tools. The commercial status for large‐scale manufacturing of nanocarbons is also presented. Finally, it proposes future research opportunities aimed at engendering modifiable and high‐performance nanocarbons for emerging applications across medical industries. This work is envisioned as a cornerstone to guide interdisciplinary teams in crafting fluorescent nanocarbons with tailored attributes that can revolutionize cancer diagnostics and therapy.This article is protected by copyright. All rights reserved

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Evolution of nanodiamond seeds during the chemical vapor deposition of diamond on silicon substrates in oxygen-rich plasmas

Cited by 14 publications

References 92 publications

Early stages of polycrystalline diamond deposition: laser reflectance at substrates with growing nanodiamonds

Early stages of polycrystalline diamond deposition: laser reflectance at substrates with growing nanodiamonds

Growth and Characterization of Polycrystalline CVD Diamond Films Obtained by MWPACVD at High Power 2,45GHz Microwave Discharge

Fluorescent Nanocarbons: From Synthesis and Structure to Cancer Imaging and Therapy

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