Unraveling the structural transition mechanism of room-temperature compressed graphite carbon.

The discovery of graphite transition to transparent and superhard carbons under room-temperature compression (Takehiko, , , 1991, , 1542 and Mao, , , 2003, , 425) launched decades of intensive research into carbon's structural polymorphism and relative phase transition mechanisms. Although many possible carbon allotropes have been proposed, experimental observations and their transition mechanisms are far from conclusive. Three longstanding issues are: (i) the speculative structures inferred by amorphous-like XRD peaks, (ii) sp and sp bonding mixing, and (iii) the controversies of transition reversibility.

[Simulated Experimental Research on Using Canopy Spectra of Surface Vegetation to Detect CO2 Microseepage Spots].

With the global warming, people now pay more attention to the problem of the emission of greenhouse gas (CO2). Carbon capture and storage (CCS) technology is an effective measures to reduce CO2 emission. But there is a possible risk that the CO2 might leak from underground.