Research around laser sensors designed in the department of chemical engineering has been highlighted in the latest issue of EPSRC's newsline magazine. The issue is focused on novel green technologies and the sensors could help in the design of next generation low emission engines in the aero and automobile industries. Dr. Johan Hult, member of the Laser Analytics group and an EPSRC Advanced Research Fellow, has developed a method of generating ultra fast wavelength sweeps covering several hundreds of nanometres in wavelength at repetition rates exceeding 10 million times a second. This extraordinary technology permits the dynamic tracking of chemical phenomena in situ at unrivalled time resolution, yielding insights into processes such as pollutant formation and combustion generated engine instabilities. There are also promising applications in other fields such as biomedical sensing.