Vanina Cayón

• Postdoctoral Researcher
• PostDoc Position at GSI Helmholtz Centre for Heavy Ion Research

Nanofluidic field-effect transistors for tailored transport and bio-inspired functionalities: solid-state nanochannels can be smartly tuned by external potentials to induce open/closed states or promote ion selectivity in the same way as biological ion channels.

Neurotransmitters are endogenous chemical messengers that play crucial roles in the transmission, enhancement and conversion of specific signals between neurons and other cells and are considered biomarkers of neurodegenerative diseases.[1] Neurodegenerative diseases cause progressive loss of cognitive and/or motor function and, as life expectancy...

Inspired by the high sensitivity, efficiency and selectivity of biological ion channels, the development of solid-state nanochannel sensors has been at the forefront of nanotechnology research in the last years. Many researchers worldwide have concentrated their efforts on the development of artificial nanochannels that can mimic the features of bi...

Exploring the fundamental chemistry and intrinsic properties of disulfide‐containing species has become an increasingly popular means to understand their action in various scientific fields, applications, and systems. In this study several representatives of this extensive family with the general formula CCl3SSR, where R represents CH2CH3, CH2CF3,...

Phenyl and pentafluorophenyl trifluorothioacetate, CF3C(O)SC6H5 and CF3C(O)SC6F5, were prepared by condensation of CF3C(O)Cl and the corresponding mercaptan RSH under vacuum conditions. The compounds were isolated and properly characterized by using infrared spectroscopy, UV-Vis, multinuclear NMR spectroscopy techniques and by mass spectrometry. Th...

Nanofluidic channels in which the ionic transport can be modulated by the application of an external voltage to the nanochannel walls have been described as nanofluidic field effect transistors (nFETs) because of their analogy with electrolyte-gated field effect transistors. The creation of nFETs is attracting increasing attention due to the possib...

Acetylcholinesterase-modified nanochannels are proposed as reliable and reproducible nanofluidic sensors for highly sensitive detection of acetylcholine. The operation mechanism relies on the use of weak polyelectrolytes as "chemical amplifiers" that adjust/reconfigure the nanochannel surface charge in the presence of local pH changes induced by th...

During the past decade, solid-state nanopores and nanochannels (SSNs) have emerged as a new class of devices for the creation of nanofluidic platforms with diverse applications. In particular, the precise control of ion transport achieved by SSNs paved the way to the development of specific and efficient biological and chemical iontronic sensors wi...

Biomimetic solid-state nanochannels enable new modalities for biosensing. In the last decade, these nanofluidic architectures have been widely studied due to their rapid and sensitive detection capabilities. Developing nanofluidic sensors with great ability to sense ions, small biomolecules, and biological macromolecules requires the combination of...

Recently, much scientific effort has been centered on the control of the ionic transport properties of solid state nanochannels and the rational design and integration of chemical systems to induce changes in the ionic transport by means of interactions with selected target molecules. Here, we report the fabrication of a novel nanofluidic device ba...

S-(tert-Butyl) trifluorothioacetate, CF3C(O)SC(CH3)3, was prepared by condensation of CF3C(O)Cl and (CH3)3CSH under vacuum conditions. The compound was isolated and properly characterized by using vibrational (infrared and Raman), UV-Vis and multinuclear NMR spectroscopy techniques and by mass spectrometry. The conformational preference and its cry...

During the last years, much scientific effort has been focused on the control of the ionic transport properties of solid state nanochannels and the rational integration of chemical systems to induce changes in the ionic transport by interaction with selected target molecules for (bio)sensing purposes. In this work, we present the construction and f...

Nanofluidic field-effect transistors (nFETs) have attracted the attention of scientific community due to its remarkable level of control over ionic transport. Particularly, the combination of nanofluidic systems and electroactive polymers has demonstrated being an interesting approach to achieve an electrochemically addressable device. In this work...