Raman Sensitive Degradation and Etching Dynamics of Exfoliated Black Phosphorus.
Layered black phosphorus has drawn much attention due to the existence of a band gap compared to the widely known graphene. However, environmental stability of black phosphorus is still a major issue, which hinders the realization of practical device applications. Here, we spatially Raman map exfoliated black phosphorus using confocal fast-scanning technique at different time intervals. We observe a Raman intensity modulation for , B2g, and modes. This Raman modulation is found to be caused by optical interference, which gives insights into the oxidation mechanism. Finally, we examine the fabrication compatible PMMA coating as a viable passivation layer. Our measurements indicate that PMMA passivated black phosphorus thin film flakes can stay pristine for a period of 19 days when left in a dark environment, allowing sufficient time for further nanofabrication processing. Our results shed light on black phosphorus degradation which can aid future passivation methods.
Center of Excellence for Green Nanotechnologies, Joint Centers of Excellence Program King Abdulaziz City for Science and Technology P.O Box 6086, Riyadh 11442, Saudi Arabia.
Fadhel
F
Alsaffar
Center of Excellence for Green Nanotechnologies, Joint Centers of Excellence Program King Abdulaziz City for Science and Technology P.O Box 6086, Riyadh 11442, Saudi Arabia.
Sarah
S
Alodan
Center of Excellence for Green Nanotechnologies, Joint Centers of Excellence Program King Abdulaziz City for Science and Technology P.O Box 6086, Riyadh 11442, Saudi Arabia.
Abdul
A
Alrasheed
Center of Excellence for Green Nanotechnologies, Joint Centers of Excellence Program King Abdulaziz City for Science and Technology P.O Box 6086, Riyadh 11442, Saudi Arabia.
Abdulrahman
A
Alhussain
Center of Excellence for Green Nanotechnologies, Joint Centers of Excellence Program King Abdulaziz City for Science and Technology P.O Box 6086, Riyadh 11442, Saudi Arabia.
Noura
N
Alrubaiq
Department of Electrical Engineering 3740 McClintock Avenue University of Southern California, Los Angeles, CA, 90089, USA.|Department of Electrical and Computer Engineering University of Jeddah, 285 Dhahban 23881, Saudi Arabia.|King Abdulaziz University, Abdullah Sulayman Street, Jeddah, 22254, Saudi Arabia.
Ahmad
A
Abbas
Center of Excellence for Green Nanotechnologies, Joint Centers of Excellence Program King Abdulaziz City for Science and Technology P.O Box 6086, Riyadh 11442, Saudi Arabia.|Department of Electrical Engineering 420 Westwood Plaza, 5412 Boelter Hall University of California, Los Angeles, CA, 90095, USA.
Moh R
MR
Amer