Tapani Ryhänen

TL;DR: An overview of the key aspects of graphene and related materials, ranging from fundamental research challenges to a variety of applications in a large number of sectors, highlighting the steps necessary to take GRMs from a state of raw potential to a point where they might revolutionize multiple industries are provided.

TL;DR: It is shown that the two-dimensional nature of graphene oxide and its superpermeability to water combine to enable humidity sensors with unprecedented response speed (∼30 ms response and recovery times), which opens the door to various applications, such as touchless user interfaces, which is demonstrated with a 'whistling' recognition analysis.

TL;DR: In this paper, a new electric equivalent circuit for the forces created by a squeezed gas film between vertically moving planar surfaces is presented. Butler et al. used the circuit model to calculate the effective viscosity in a narrow gap between the moving surfaces.

TL;DR: It is demonstrated that solution-processed MoOx/MoS2 and WOx/WS2 heterostructures sandwiched between two printed silver electrodes exhibit an unprecedentedly large and tunable electrical resistance range from 10(2) to 10(8) Ω combined with low programming voltages of 0.1-0.2 V.

TL;DR: The first successful application of an ordered bicontinuous double-gyroid vanadium pentoxide network in an electrochromic supercapacitor is reported, which is ideal for fast and efficient lithium ion intercalation/extraction and faradaic surface reactions, which are essential for high energy and high power density electrochemical energy storage devices.