Aerosol Imaging with a Soft X-Ray Free Electron Laser

作者：Bogan Michael J^*; Boutet Sebastien; Chapman Henry N; Marchesini Stefano; Barty Anton; Benner W Henry; Rohner Urs; Frank Matthias; Hau Riege Stefan P; Bajt Sasa; Woods Bruce; Seibert M Marvin; Iwan Bianca; Timneanu Nicusor; Hajdu Janos; Schulz Joachim

来源：Aerosol Science and Technology, 2010, 44(3): I-VI.

DOI：10.1080/02786820903485800

Lasers have long played a critical role in the advancement of aerosol science. A new regime of ultrafast laser technology has recently be realized, the world's first soft x-ray free electron laser. The Free electron LASer in Hamburg, FLASH, user facility produces a steady source of 10 femtosecond pulses of 7-32 nm x-rays with 1012 photons per pulse. The high brightness, short wavelength, and high repetition rate (>500 pulses per second) of this laser offers unique capabilities for aerosol characterization. Here we use FLASH to perform the highest resolution imaging of single PM2.5 aerosol particles in flight to date. We resolve to 35 nm the morphology of fibrous and aggregated spherical carbonaceous nanoparticles that existed for less than two milliseconds in vacuum. Our result opens the possibility for high spatial- and time-resolved single particle aerosol dynamics studies, filling a critical technological need in aerosol science.

• 出版日期2010