Comparison between front- and back-gating of Silicon Nanoribbons in real-time sensing experiments

Accastelli, Enrico; Cappi, Giulia; Buckley, J.; Ernst, T.; Guiducci, Carlotta

doi:10.1109/nano.2013.6721024

Cited by 3 publications

(2 citation statements)

References 10 publications

(11 reference statements)

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“…The SiNR chip is coupled with a microfluidic module that employs Ag/AgCl reference electrodes (REs) and allows subsequent injections of different solutions into sub-5 µL microchannels ( Figure 1 c) [ 37 ].…”

Section: Resultsmentioning

confidence: 99%

“…Instead, in the case of front-gating, a voltage V FG-S is applied between the electrolyte solution, biased by Ag/AgCl REs, and the source terminal, while the back-gate is short-circuited with the source contact. As shown in our previous work [ 37 ], the front-gating configuration with grounded back-gate prevents from any parasitic coupling between the electrolyte solution and the environment.…”

Section: Resultsmentioning

confidence: 99%

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Multi-Wire Tri-Gate Silicon Nanowires Reaching Milli-pH Unit Resolution in One Micron Square Footprint

et al. 2016

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The signal-to-noise ratio of planar ISFET pH sensors deteriorates when reducing the area occupied by the device, thus hampering the scalability of on-chip analytical systems which detect the DNA polymerase through pH measurements. Top-down nano-sized tri-gate transistors, such as silicon nanowires, are designed for high performance solid-state circuits thanks to their superior properties of voltage-to-current transduction, which can be advantageously exploited for pH sensing. A systematic study is carried out on rectangular-shaped nanowires developed in a complementary metal-oxide-semiconductor (CMOS)-compatible technology, showing that reducing the width of the devices below a few hundreds of nanometers leads to higher charge sensitivity. Moreover, devices composed of several wires in parallel further increase the exposed surface per unit footprint area, thus maximizing the signal-to-noise ratio. This technology allows a sub milli-pH unit resolution with a sensor footprint of about 1 µm2, exceeding the performance of previously reported studies on silicon nanowires by two orders of magnitude.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Multi-Wire Tri-Gate Silicon Nanowires Reaching Milli-pH Unit Resolution in One Micron Square Footprint

et al. 2016

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Digital approaches in electronic biochips

Guiducci

Accastelli

Spiga

2013

2013 IEEE International Electron Devices Meeting

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Electronic biochips are defined by the merge of integrated electronics, containing diverse sensors, with reaction solution and sample hold in reaction chamber(s). Based on their overall structure, electronic biochips can work in either well-confined or in area-confined configurations. Extreme parceling of the sample (digital approach), coupled with electronic biochips, can radically enhance the throughput performance of the assay, especially in an area-defined configuration. This takes advantage of the increased sensitivity that follows device miniaturization, as illustrated in our experiments on Silicon Nano Ribbons.

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Characterization and modelling of differential sensitivity of nanoribbon-based pH-sensors

Scarbolo

Accastelli

Pittino

et al. 2015

2015 Transducers - 2015 18th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS)

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We report accurate characterization, modelling and simulation of SOI nanoribbon-based pH sensors and we compare operation in air (dry) and electrolyte (wet) environments. We find remarkably different current density distributions and geometry scaling rules, but similar series resistances and active trap state densities in the two configurations. Calibrated TCAD based simulations implementing an original approach to model the site-binding harge, and in good agreement with experiments, provide the necessary insights to interpret the non trivial dependence of the threshold voltage and current sensitivity on pH

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Comparison between front- and back-gating of Silicon Nanoribbons in real-time sensing experiments

Cited by 3 publications

References 10 publications

Multi-Wire Tri-Gate Silicon Nanowires Reaching Milli-pH Unit Resolution in One Micron Square Footprint

Multi-Wire Tri-Gate Silicon Nanowires Reaching Milli-pH Unit Resolution in One Micron Square Footprint

Digital approaches in electronic biochips

Characterization and modelling of differential sensitivity of nanoribbon-based pH-sensors

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