Explore the mission of contemporary expressive Art -- What is conveyed to people and passed on to The Times? It is the embodiment of the existential value of the new schemata and concepts in contemporary expressive art. With new eyes to see the contemporary performance art, swift capture, listening, feeling the demands of our era, and suggests that to explore the time background of works creation, have the courage to explore something useful from the text, the understanding of contemporary art of the new concept of schemata and harmony within, hard practice may harvest is unpredictable. Because the history of art is not the history of technical schemata proficiency, but can be understood as the history of changes of artistic concepts and artistic expression schemata to meet the needs of The Times. We are a nation with a long history. How to implement the civilization art of thousands of years in the current world and to establish the memory of the future is the mission that The Times endow contemporary artists with inheritance and creation.

Large-size graphene samples are successfully prepared by combining ultrosonic assisted liquid phase exfoliation process with oxidation-deoxidation method. Different from previous works, we used an ultrasound-treated expanded graphite as the raw material and prepared the graphene via a facile oxidation-reduction reaction. Results of X-ray diffraction and Raman spectroscopy confirm the crystal structure of the as-prepared graphene. Scanning electron microscopy images show that this kind of graphene has a large size (with a diameter over 100 μm), larger than the graphene from graphite powder and flake graphite prepared through single oxidation-deoxidation method. Transmission electron microscopy results also reveal the thin layers of the prepared graphene (number of layers ≤3). Furthermore, the importance of preprocessing the raw materials is also proven. Therefore, this method is an attractive way for preparing graphene with large size.