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In this review, the preparations of various nanoparticles and their applications in inkjet and printing fields were summarized. It includs the introduction of the green plate-making by inkjet printing based on inorganic nanocomposites, the fast assembly of photonic crystals based on polymer colloidal nanoparticles via inkjet printing, the development of printed electronics based on metal nanoparticle inks, and the discussion of nanoparticles for application in three-dimensional printing. Besides, their future prospects were presented.

In this work, several new compounds containing tetraphenylene (TPE) units and dimesitylboron groups were synthesized through Sonogashira coupling reaction. The compounds showed the aggregation induced emission (AIE), emitted the different color and gave the relatively high quantum yield of fluorescence in solid state. Two of the compounds demonstrated the prospective application in data storage, and one molecule also displayed the potential value in biological fluorescent cell imaging.

We report on the reversible, electrical and optical switching on silver 3-phenyl-1-ureidonitrile complex thin films. The films can switch from a high impedance state to a low impedance state with an applied electric field at the threshold of 3.5x10(7)V/m. Furthermore, the films can be switched back to the original state by treating the samples at about 80degreesC. The optical recording is fulfilled using a semiconductor laser with a wavelength of 780 nm. Erasure can be accomplished by bulk heating or by the laser working with the power beneath the threshold. No loss of the organic was found in the experiments. This material may have a potential application in ultrahigh data density storage.

High-precision patterns have aroused wide attention due to their important applications in high-performance op- tical/electrical devices. By virtue of easy and direct writing of desired patterns, high throughput and low-cost, inkjet printing has become one of the most promising candidates for the manufacture of patterns, compared with conventional approaches such as photolithography, microcontact printing. Various materials can be precisely deposited on target positions. As a pri- mary focus, improving the precision of printed patterns would greatly enhance the performance of the devices. So far, various approaches have been developed for improving the printing precision. Pattern resolution is limited by the volume of jetted droplet and the area of droplet spreading on substrate. Finer resolution can be achieved through reducing the deposition di- mension, i.e. optimization of the chemical composition of ink, chemical/physical modification of substrates, and improve- ment of printing apparatus. Besides, uniform deposition of functional materials is also essential for fabricating high-precision patterns and high-performance devices. "Coffee ring" is a common phenomenon during the drying process of droplets, which is generated due to the pinning three phase contact line (TCL) and the outward capillary flow in an evaporating droplet. Therefore, homogenous deposition without "coffee ring" effect can be realized by tuning the capillary flow in the droplet and controlling the movement of the TCL as the droplet evaporating. In this paper, we presented the recent research progress for achieving high-precision patterns by inkjet printing, including minimizing the deposition dimension to improve the resolution and avoiding the "coffee ring" effect to achieve high uniformity. These reports will probably promote the development of novel and facile method for high-precision inkjet printing. New trends and research perspectives were briefly discussed at the last section of this review.

Nanometer scale data recording has been achieved on p-nitrobenzonitrile thin films using scanning tunneling microscopy.When a series of voltage pulse is applied between the STM tip and the highly ordered pyrolytic graphite substrate, structural transition at molecular scale has been observed directly for PNBN thin films.The recording mechanism is attributed to local structural transition at molecular scale,i.e.,from a crystalline state to a disordered one.The former corresponds to a high electrical resistance,and the latter to a low resistance.