Sulfonated Mesoporous Silica as Proton Exchanging Layer in Solid‐State Organic Transistor. (5th October 2017)

• Record Type: Journal Article
• Authors: Yambem, Soniya D.; Timm, Jana; Weiss, Morten; Pandey, Ajay K.; Marschall, Roland
• Is Part Of: Advanced Electronic Materials. Volume 3:Number 12(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-10-05
• Subjects: biosensing -- low voltage transistors -- mesoporous silica nanoparticles -- organic thin film transistors -- proton sensing; Materials -- Electric properties -- Periodicals; Materials science -- Periodicals; Magnetic materials -- Periodicals; Electronic apparatus and appliances -- Periodicals; 537
• DOI: 10.1002/aelm.201700316
• Languages: English
• ISSNs: 2199-160X

Abstract

Abstract: Electronic devices that can interface with biological systems are highly desirable for developing smart bionics and prosthetics. However, this is challenging since most electronic devices used in our daily life send signals through flow of electrons while biological signals are carried via the exchange of ions and protons. Here, an all‐solid‐state, low‐voltage proton‐sensing electronic device using sulfonated mesoporous silica nanoparticles as gate materials in an organic thin film transistor (OTFT) is presented. The OTFT gated with solution processable SO3 H‐Si‐MCM‐41 nanoparticle film maintains transistor output characteristics for operating source–drain voltages 0 > V ds > −2.0 V. This proton‐sensing OTFT shows strong modulation in the drain current, ≈12‐fold increase, when the top of the SO3 H‐Si‐MCM‐41 layer is brought in contact with H2 O2, demonstrating that such OTFT operation is highly applicable in advanced biomedical sensing platforms. The effect of gate electrode thickness and quantity of analyte on achievable modulation is also presented. The sensitivity and stability of the proton sensitive OTFTs over five decades of concentration of analyte is discussed. Abstract : Sulphonated mesoporous silica nanoparticle film is used as gate electrode to fabricate an all‐solid‐state, low‐voltage‐operating organic thin‐film transistor for sensing protons. The nanoparticle film in the transistor has a multifunctional role as a gate electrode and as a proton transfer membrane. This bioinspired transistor shows up to a ≈12‐fold increase in source–drain current upon sensing protons.