Bioelectronic transducing surfaces that are nanometric in size have been the main route to detect single molecules. Though enabling the study of rarer events, such methodologies are not suited to assay at concentrations below the nanomolar level. Bioelectronic field-effect-transistors with a wide (μm 2-mm 2) transducing interface are also assumed to be not suited, because the molecule to be detected is orders of magnitude smaller than the transducing surface. Indeed, it is like seeing changes on the surface of a one-kilometer-wide pond when a droplet of water falls on it. However, it is a fact that a number of large-area transistors have been shown to detect at a limit of detection lower than femtomolar; they are also fast and hence innately suitable for point-of-care applications. This review critically discusses key elements, such as sensing materials, FET-structures, and target molecules that can be selectively assayed. The amplification effects enabling extremely sensitive large-area bioelectronic sensing are also addressed.
SormenjälkiSukella tutkimusaiheisiin 'Large-Area Interfaces for Single-Molecule Label-free Bioelectronic Detection'. Ne muodostavat yhdessä ainutlaatuisen sormenjäljen.
Martti Toivakka (PI), Jessica Rosenholm (PI), Nicklas Anttu (PI), Johan Bobacka (PI), Tan Phat Huynh (PI), Jouko Peltonen (PI), Xiaoju Wang (PI), Carl-Eric Wilen (PI), Chunlin Xu (PI), Hongbo Zhang (PI) & Ronald Österbacka (PI)Faculty of Science and Engineering
ProSiT: Protein Detection at the Single Molecule Limit with a Self-powered Organic Transistor for HIV early diagnosis
01/09/20 → 31/08/23
Projekti: Academy of Finland/Other Research Councils
01/01/19 → 31/12/22