Multisite Dopamine Sensing With Femtomolar Resolution Using a CMOS Enabled Aptasensor Chip

Frontiers in Neuroscience

Larysa Baraban¹  Imad Ibrahim²  Violetta Sessi²  Andreas Hierlemann³  Florent Seichepine⁴  André Heinzig⁵  Walter M. Weber⁶  Bergoi Ibarlucea⁷  Gianaurelio Cuniberti⁷  Stephanie Klinghammer⁷  Urs Frey⁸  Nadine Szabo⁹  Thomas Mikolajick⁹ 

[1] 0Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Radiopharmaceutical Cancer Research, Dresden, Germany;Center for Advancing Electronics Dresden, TU Dresden, Dresden, Germany;Department of Biosystems Science and Engineering, Bio Engineering Laboratory, ETH Zürich, Basel, Switzerland;Imperial College London, London, United Kingdom;Institute of Semiconductor and Microsystems, TU Dresden, Dresden, Germany;Institute of Solid State Electronics, TU Wien, Vienna, Austria;Max Bergman Center of Biomaterials Dresden and Institute for Materials Science, TU Dresden, Dresden, Germany;MaxWell Biosystems AG, Basel, Switzerland;NaMLab gGmbH, Dresden, Germany;RIKEN Quantitative Biological Center, Kobe, Japan;

关键词: dopamine detection;    silicon nanowire;    CMOS (complementary metal oxide semiconductor);    aptasensor;    multisite array;   

DOI  :  10.3389/fnins.2022.875656

来源: DOAJ

【 摘 要 】

Many biomarkers including neurotransmitters are found in external body fluids, such as sweat or saliva, but at lower titration levels than they are present in blood. Efficient detection of such biomarkers thus requires, on the one hand, to use techniques offering high sensitivity, and, on the other hand, to use a miniaturized format to carry out diagnostics in a minimally invasive way. Here, we present the hybrid integration of bottom-up silicon-nanowire Schottky-junction FETs (SiNW SJ-FETs) with complementary-metal–oxide–semiconductor (CMOS) readout and amplification electronics to establish a robust biosensing platform with 32 × 32 aptasensor measurement sites at a 100 μm pitch. The applied hetero-junctions yield a selective biomolecular detection down to femtomolar concentrations. Selective and multi-site detection of dopamine is demonstrated at an outstanding sensitivity of ∼1 V/fM. The integrated platform offers great potential for detecting biomarkers at high dilution levels and could be applied, for example, to diagnosing neurodegenerative diseases or monitoring therapy progress based on patient samples, such as tear liquid, saliva, or eccrine sweat.

【 授权许可】

Unknown