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• The hole and electron mobilities μ FET of graphene TFT in linear regime are 31 cm2v−1s−1 and 63 cm2v−1s−1 respectively. • Linear regime electron mobility after depositing PDIF-CN 2 is 400 cm2v−1s−1. • I ON /I OFF ratio of PDIF-CN 2 is at 2 and threshold voltage is at 6.5 ± 1 V. A two dimensional form of carbon, Graphene has captured great interest in many fields due to its attractive physical and electrical properties. Recently, graphene based transistors are produced widely, which becomes in place of silicon in the coming years. Here, we studied the effect of integration n-type molecule with graphene to develop thin film transistors. Morphology and transfer characteristics of N,N′-1H,1H-perfluorobutyldicyanoperylene-carboxydi-imide(PDIF-CN 2) islands on graphene are studied and compared the transfer characteristics of graphene TFT and PDIF-CN 2 /graphene TFT. CVD graphene is used to examine the growth and charge transport of PDIF-CN 2 /graphene TFT. 6.3 times increase in mobility has noticed after depositing PDIF-CN 2 islands on graphene. I ON/OFF ratio of PDIF-CN 2 /graphene TFT is 2 and Threshold voltage is 6.5 ± 1 V. The low I ON/OFF ratio is due to the high quantity of PDIF-CN 2 molecules. Observed linear behavior of I D at V DS =1 V, shows the absence of interface energy barrier for charge carrier injection, where gold electrodes were deposited on PDIF-CN 2 / Graphene. Gold-PDIF-CN 2 layer behave as ohmic contact, where the current-voltage (I-V) curve is linear as with Ohm's law. Morphological studies were conducted using Atomic Force Microscopy and Transmission Electron Microscopy. AFM studies reveal that size of PDIF-CN 2 islands on graphene. The height of these islands is 35 nm and width is 350 nm. Different crystalline orientation has noticed by Transmission Electron Microscopy. [Display omitted] [ABSTRACT FROM AUTHOR]

Nanotoxicology and nanomedicine investigations often require the probing of nano-objects such as fibres and particles in biological samples and cells, whilst internalization and intracellular destiny are the main issues for in vitro cellular studies. Various high resolution microscopy techniques are well suited for providing this highly sought-after information. However, sample preparation, nanomaterial composition and sectioning challenges make it often difficult to establish whether the fibres or particles have been internalized or they are simply overlaying or underlying the biological matter. In this paper we suggest a novel suitable combination of two different microscopic techniques to reveal in intact cells the uptake of asbestos fibres by mesothelial cells. After exposure to asbestos fibres and fixation, cells were first analysed under the AFM instrument and then imaged under the TwinMic soft X-ray microscope at Elettra Sincrotrone. The suggested approach combines standard soft X-ray microscopy imaging and AFM microscopy, with a common non-invasive sample preparation protocol which drastically reduces the experimental uncertainty and provides a quick and definitive answer to the nanoparticle cellular and tissue uptake. [ABSTRACT FROM AUTHOR]