Functionalization of SWNTs with fluorophores attracts considerable attention for biomedical applications, however, the quenching phenomenon of fluorophores is main problem when fluorophores directly adsorbed onto SWNT surfaces. We have succeeded in labeling fluorophore toward SWNTs with slight quenching by pretreating SWNT surfaces with ssDNA. Moreover, the quenching phenomenon of fluorophores could be controlled by regulating base sequence of fluorescent DNA on ssDNA-SWNT surfaces.
Correct description of the attenuation of signal electrons in the near-surface regions of a solid is essential for estimating the surface sensitivity of surface electron spectroscopies such as Auger electron spectroscopy (AES) and X-ray photoelectron spectroscopy (XPS) etc.
We report an unusual reaction channel that formate (HCOO) is synthesized by direct hydrogenation of energetic CO2 without C=O bond(s) cleavage via Eley-Rideal type mechanism on Cu surfaces. We found that both of translational energy and vibrational energy are indispensable for CO2 to overcome the reaction barrier and form C-H bond by capturing hydrogen adatom oncold Cu surfaces.