Engineering and Technology

A customizable, low-power, wireless, embedded sensing platform for resistive nanoscale sensors

S. Nedelcu, K. Thodkar, et al.

Discover a groundbreaking wireless platform that interfaces high-sensitivity nanoscale sensors, enabling precise detection of trace gases like NO₂. Developed by Stefan Nedelcu, Kishan Thodkar, and Christofer Hierold, this innovative technology boasts exceptional performance, with a limit of detection down to 1 ppb and the flexibility for various IoT applications.

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Abstract

This paper presents a customizable, portable, battery-operated, wireless platform for interfacing high-sensitivity nanoscale sensors. The platform acquires currents from 1.5 nA to 7.2 µA with 20-bit resolution and variable sampling rates up to 3.125 kSPS. It features a bipolar voltage programmable from -10 V to +5 V with 3.65 mV resolution. A Finite State Machine (FSM) allows dynamic adjustments of nanosensor bias, data logging, and Bluetooth Low Energy (BLE) data transmission. Average power consumption is 64.5 mW at three samples per second with 0 dBm BLE transmission. The platform's performance is demonstrated using a CNT nanosensor for NO₂ detection down to 1 ppb, with a 3σ limit of detection of 23 ppb. Its versatility makes it suitable for various resistive nanosensors and IoT applications.

Publisher

Microsystems & Nanoengineering

Published On

Jan 28, 2022

Authors

Stefan Nedelcu, Kishan Thodkar, Christofer Hierold

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