Ultrathin Supported Lipid Monolayer with Unprecedented Mechanical and Dielectric Properties

Abstract

The development of ultrathin dielectrics for low power electronics operations, flexible and printed electronics, and field‐effect‐transistor‐based sensors is still a challenge. Here, monolayers of engineered lipids supported on silicon are reported presenting exceptional mechanical and dielectric properties. The lipid monolayers are stabilized using a simple procedure based on a two‐stage reticulation process in both their aliphatic chains and their head‐group. With a thickness lower than 3 nm, such layers are demonstrated to offer exceptional mechanical and dielectric stability with unprecedented low leakage current and dielectric strength. Surprisingly, the mechanical and dielectric pressures required to rupture/breakdown the monolayers are shown to be similar. These results suggest the presence of a strong correlation between mechanical and dielectric properties, as well as between the mechanisms of rupture and breakdown.

Novel and Innovative Interface as Potential Active Layer in Chem-FET Sensor Devices for the Specific Sensing of Cs+

“…Respectively we have implemented a methodology that ensures us to have SLM with unprecedented mechanical and electrical properties. 39,40 Based on these relevant facts, we decided to functionalize the chelator 3 with an appropriate anchoring group in order to be grafted on an engineered SLM.…”

Electrolyte-gated-organic field effect transistors functionalized by lipid monolayers with tunable pH sensitivity for sensor applications

“…The more detailed conditions were described in the supporting information. 8,23) Consequently, the ultrathin (2.2 nm) phospholipid monolayer sustainably covered the P3HT surface. The attenuated total reflection Fourier transform infrared (ATR-FTIR) measurement confirmed the formation of the LML on P3HT film.…”

“…S2) improved the mechanical and electrical stability of LML. 23,24) Then, DC-MTS were obtained by exposing the device to the MTS solution diluted by 1,4-dioxane (Sigma-Aldrich). The more detailed conditions were described in the supporting information.…”

Femtomolar detection of Cu2+ ions in solution using super-Nernstian FET-sensor with a lipid monolayer as top-gate dielectric

“…In another work, FET composed of an engineered lipid monolayer as ultrathin gate dielectric was demonstrated to provide very low limit of detection down to 50 fM with a good selectivity towards Fe 3+ ions (Nguyen et al, 2014). These advanced selfassembled lipid monolayers, obtained by reticulation of the lipids, present exceptional dielectric strength in the range 20 to 30 MV/cm (Dumas et al, 2011;Kenaan et al, 2018) and good mechanical stability (Charrier et al, 2010;El Zein et al, 2012). Additionally, these layers are extremely versatile and can be easily chemically customized to impart specific functionalities (Kenaan et al, 2018;Nguyen et al, 2013).…”

“…These advanced selfassembled lipid monolayers, obtained by reticulation of the lipids, present exceptional dielectric strength in the range 20 to 30 MV/cm (Dumas et al, 2011;Kenaan et al, 2018) and good mechanical stability (Charrier et al, 2010;El Zein et al, 2012). Additionally, these layers are extremely versatile and can be easily chemically customized to impart specific functionalities (Kenaan et al, 2018;Nguyen et al, 2013). Such layers were also used for the fabrication of micro-array as capacitive sensing platforms to detect and quantify ferric ions concentrations in solution (Kenaan et al, 2016).…”