2 research outputs found
Electrical Double Layer at Various Electrode Potentials: A Modification by Vibration
This paper proposes a vibration model
of ions as an improvement over the conventional Gouy–Chapman–Stern
theory, which is used to model the electrical double layer capacitance
and to study the ionic dynamics at electrode/electrolyte interfaces.
Although the Gouy–Chapman–Stern model is successful
for small applied potentials, it fails to explain the observed behavior
at larger potentials, which are becoming increasingly important as
materials with high charge injection capacities are developed. A time-dependent
study on ionic transport indicates that ions vibrate near the electrode
surface in response to the applied electric field. This vibration
allows us to correctly predict the experimentally observed decreasing
differential capacitance at high electrode potential. This new model
elucidates the mechanism behind the ionic dynamics at solid–electrolyte
interfaces, providing useful insight that may be applied to many electrochemical
systems in energy storage, photoelectrochemical cells, and biosensing
Polycrystalline Diamond Coating of Additively Manufactured Titanium for Biomedical Applications
Additive
manufacturing using selective laser melted titanium (SLM-Ti) is used
to create bespoke items across many diverse fields such as medicine,
defense, and aerospace. Despite great progress in orthopedic implant
applications, such as for “just in time” implants, significant
challenges remain with regards to material osseointegration and the
susceptibility to bacterial colonization on the implant. Here, we
show that polycrystalline diamond coatings on these titanium samples
can enhance biological scaffold interaction improving medical implant
applicability. The highly conformable coating exhibited excellent
bonding to the substrate. Relative to uncoated SLM-Ti, the diamond
coated samples showed enhanced mammalian cell growth, enriched apatite
deposition, and reduced microbial <i>S. aureus</i> activity.
These results open new opportunities for novel coatings on SLM-Ti
devices in general and especially show promise for improved biomedical
implants