1. Department of Mechanical EngineeringNational University of Singapore Singapore 117575 Singapore
2. Key Laboratory of Space Applied Physics and ChemistryMinistry of EducationDepartment of Applied ChemistrySchool of ScienceNorthwestern Polytechnical University Xi'an Shaanxi 710072 China
3. Department of Chemical and Biomolecular EngineeringNational University of Singapore Singapore 119260 Singapore
4. Research and Development CenterTeerthanker Mahaveer University Moradabad 244001 Uttar Pradesh India