Wafer-level decoration of carbon nanotubes in field-effect transistor geometry with preformed gold nanoparticles using a microfluidic approach

Ferrocenyl‐Pyrenes, Ferrocenyl‐9,10‐Phenanthrenediones, and Ferrocenyl‐9,10‐Dimethoxyphenanthrenes: Charge‐Transfer Studies and SWCNT Functionalization

“…reported SWCNTs that are surface‐functionalized with 12‐(pyren‐1‐yl)dodecane‐1‐thiol, which form hybrids with gold nanoparticles . Such arrangements allow, for example, tuning of the transistor channel in nanoelectronic SWCNT field‐effect transistors, which enables the fabrication of optoplasmonic sensor arrays on the chip level …”

“…[29] Such arrangements allow,f or example, tuning of the transistor channel in nanoelectronic SWCNT field-effect transistors, which enables the fabrication of optoplasmonic sensor arrays on the chip level. [29,30] Ferrocene-functionalized CNT nanohybrids have attracted much attentioni nt he fields of (bio)analytical electrochemistry, [31] solar energy conversion, [32] or as electrocatalytically active materials [33] and photosensitizers, [34] whereby the modification can be achieved by exohedral functionalization at the CNTss urface [31,35,36] or in an endohedral fashionb y filling the nanotubes with ferrocene species. [37][38][39][40] Exohedral covalenta ttachment of ferrocenes to SWCNTsi st hereby betterc onsidered as non-covalent binding.…”

Photosensitive Field‐Effect Transistors Made from Semiconducting Carbon Nanotubes and Non‐Covalently Attached Gold Nanoparticles

“…Rational of our experimental work is a proof‐of‐principle for the wafer‐scalable fabrication of customizable, photosensitive CNT‐FET devices using the formation of nanoconjugates between SWCNTs and Au‐NPs as active material, non‐covalently mediated by pyrene derivatives. In the CNT‐FET approach, the SWCNTs act as channel material and the ideal working point of the sensor device can be adjusted by applying a certain gate field . Non‐covalent interactions are chosen with the aim to keep the electronic structure of the SWCNTs intact .…”

“…Nanoconjugates (or: hybrids) made from low‐dimensional carbon nanomaterials such as semiconducting single‐walled carbon nanotubes (SWCNTs) and transition metal and/or metal oxide nanoparticles (NPs) have received considerable interest in science and technology as nanoscopic solid‐state building blocks that enable such disruptive nanoelectronic sensor solutions with a high fidelity, sensitivity, and specifity . In such devices, semiconducting SWCNTs can act as a versatile channel material for nanoelectronic transistors (carbon‐nanotube field‐effect transistors: CNT‐FETs) as single or individualized carbon nanotubes (CNTs), aligned as oriented networks, or CNT superstructures in bundles, fibers and ropes, or composite network films . In this work, we outline a method for the fabrication of arrays of CNT‐FETs functionalized with gold nanoparticles as photosensitive or perspectively photochemosensitive field‐effect transistors.…”

“…Summarizing this section of fabrication methods, local functionalization concepts can enable addressable arrays or matrices of sensor devices, digitally adjusted (down to “circulation” one) within a large‐area and/or large‐volume fabrication chain . In our chip‐level flow‐chemistry approach, we follow this concept.…”