Review: Silicon oxycarbide based materials for biomedical applications

Arango‐Ospina, Marcela; Xie, Fangtong; Gonzalo‐Juan, Isabel; Riedel, Ralf; Ionescu, Emanuel; Boccaccını, Aldo R.

doi:10.1016/j.apmt.2019.100482

Cited by 34 publications

(39 citation statements)

References 76 publications

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“…This effect has been attributed to an increased network connectivity of the silicon oxycarbides as compared to that of vitreous silica. Moreover, studies concerning the network architecture of silicon oxycarbide glasses revealed a relatively low mass fractal dimension of those materials (typically in the range of 2.3–2.5) [ 2 ], which has been reflected for instance in a very low Poisson ratio (i.e., 0.11 as compared to 0.17 in silica-based glasses) [ 4 ] and highly promising bioactivity with respect to hydroxyapatite mineralization [ 5 , 6 , 7 ]. The glassy network of silicon oxycarbides can be easily altered via incorporating additional network formers (i.e., boron) [ 8 ] or modifiers (e.g., Li, Ca, Mg, etc.)…”

Section: Introductionmentioning

confidence: 99%

Effect of the Content and Ordering of the sp2 Free Carbon Phase on the Charge Carrier Transport in Polymer-Derived Silicon Oxycarbides

et al. 2020

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The present work elaborates on the correlation between the amount and ordering of the free carbon phase in silicon oxycarbides and their charge carrier transport behavior. Thus, silicon oxycarbides possessing free carbon contents from 0 to ca. 58 vol.% (SiOC/C) were synthesized and exposed to temperatures from 1100 to 1800 °C. The prepared samples were extensively analyzed concerning the thermal evolution of the sp2 carbon phase by means of Raman spectroscopy. Additionally, electrical conductivity and Hall measurements were performed and correlated with the structural information obtained from the Raman spectroscopic investigation. It is shown that the percolation threshold in SiOC/C samples depends on the temperature of their thermal treatment, varying from ca. 20 vol.% in the samples prepared at 1100 °C to ca. 6 vol.% for the samples annealed at 1600 °C. Moreover, three different conduction regimes are identified in SiOC/C, depending on its sp2 carbon content: (i) at low carbon contents (i.e., <1 vol.%), the silicon oxycarbide glassy matrix dominates the charge carrier transport, which exhibits an activation energy of ca. 1 eV and occurs within localized states, presumably dangling bonds; (ii) near the percolation threshold, tunneling or hopping of charge carriers between spatially separated sp2 carbon precipitates appear to be responsible for the electrical conductivity; (iii) whereas above the percolation threshold, the charge carrier transport is only weakly activated (Ea = 0.03 eV) and is realized through the (continuous) carbon phase. Hall measurements on SiOC/C samples above the percolation threshold indicate p-type carriers mainly contributing to conduction. Their density is shown to vary with the sp2 carbon content in the range from 1014 to 1019 cm−3; whereas their mobility (ca. 3 cm2/V) seems to not depend on the sp2 carbon content.

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Section: Introductionmentioning

confidence: 99%

Effect of the Content and Ordering of the sp2 Free Carbon Phase on the Charge Carrier Transport in Polymer-Derived Silicon Oxycarbides

et al. 2020

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“…Moreover, the low temperatures (between 200–600 °C) during PECVD processes make it feasible to deposit SiC on a variety of materials (e.g., aluminum), which is not possible using APCVD and LPCVD processes. The low deposition temperatures also confirm its potential suitability for some thermal sensitive polymer processing [ 75 ]. As hydrogenated precursor gases are used in the SiC growth by CVD processes, significant amounts of hydrogen (free and bonded) are incorporated in SiC films deposited at a low temperature (below 600 °C) by PECVD.…”

Section: Chemical Vapor Synthesis Of Sic Films: From Cvd To Aldmentioning

confidence: 92%

Progresses in Synthesis and Application of SiC Films: From CVD to ALD and from MEMS to NEMS

Fraga

Pessoa

2020

Micromachines

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A search of the recent literature reveals that there is a continuous growth of scientific publications on the development of chemical vapor deposition (CVD) processes for silicon carbide (SiC) films and their promising applications in micro- and nanoelectromechanical systems (MEMS/NEMS) devices. In recent years, considerable effort has been devoted to deposit high-quality SiC films on large areas enabling the low-cost fabrication methods of MEMS/NEMS sensors. The relatively high temperatures involved in CVD SiC growth are a drawback and studies have been made to develop low-temperature CVD processes. In this respect, atomic layer deposition (ALD), a modified CVD process promising for nanotechnology fabrication techniques, has attracted attention due to the deposition of thin films at low temperatures and additional benefits, such as excellent uniformity, conformability, good reproducibility, large area, and batch capability. This review article focuses on the recent advances in the strategies for the CVD of SiC films, with a special emphasis on low-temperature processes, as well as ALD. In addition, we summarize the applications of CVD SiC films in MEMS/NEMS devices and prospects for advancement of the CVD SiC technology.

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“…In this matter, numerous research work has been done to test and use the materials in modern medicine. An extensive list of medical applications can be found elsewhere (Nune and Misra, 2016;Tang et al, 2016;Gim et al, 2019;Luzi et al, 2019;Arango-Ospina et al, 2020;Song et al, 2020). The property of biocompatibility invited the scientific community to explore the characteristics of nanotechnology (Bayda et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Modern World Applications for Nano-Bio Materials: Tissue Engineering and COVID-19

Melchor-Martínez

Castillo

Macías-Garbett

et al. 2021

Front. Bioeng. Biotechnol.

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Over the past years, biomaterials-based nano cues with multi-functional characteristics have been engineered with high interest. The ease in fine tunability with maintained compliance makes an array of nano-bio materials supreme candidates for the biomedical sector of the modern world. Moreover, the multi-functional dimensions of nano-bio elements also help to maintain or even improve the patients’ life quality most securely by lowering or diminishing the adverse effects of in practice therapeutic modalities. Therefore, engineering highly efficient, reliable, compatible, and recyclable biomaterials-based novel corrective cues with multipurpose applications is essential and a core demand to tackle many human health-related challenges, e.g., the current COVID-19 pandemic. Moreover, robust engineering design and properly exploited nano-bio materials deliver wide-ranging openings for experimentation in the field of interdisciplinary and multidisciplinary scientific research. In this context, herein, it is reviewed the applications and potential on tissue engineering and therapeutics of COVID-19 of several biomaterials. Following a brief introduction is a discussion of the drug delivery routes and mechanisms of biomaterials-based nano cues with suitable examples. The second half of the review focuses on the mainstream applications changing the dynamics of 21st century materials. In the end, current challenges and recommendations are given for a healthy and foreseeable future.

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Review: Silicon oxycarbide based materials for biomedical applications

Cited by 34 publications

References 76 publications

Effect of the Content and Ordering of the sp2 Free Carbon Phase on the Charge Carrier Transport in Polymer-Derived Silicon Oxycarbides

Effect of the Content and Ordering of the sp2 Free Carbon Phase on the Charge Carrier Transport in Polymer-Derived Silicon Oxycarbides

Progresses in Synthesis and Application of SiC Films: From CVD to ALD and from MEMS to NEMS

Modern World Applications for Nano-Bio Materials: Tissue Engineering and COVID-19

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