P60h ultrasonic cleaner

Bulk 2H–MoS₂ powder (∼6 μm to max. 40 μm, product number 69860, batch number WXBD2352V) and single-walled carbon nanotubes (SWCNTs, 0.78 nm average diameter, product number 773735, batch number MKCJ7287) were purchased from Sigma Aldrich and used without further purification. Ultrapure type I water (18.2 MΩ cm) from a Millipore Simplicity® water purification system was used for all experiments. All organic solvents were HPLC grade and used without further purification. A bath sonicator (Elmasonic P60H ultrasonic cleaner) was used for sonication and an Eppendorf MiniSpin Plus Microcentrifuge was used for centrifugation.

2H-MoS₂ was exfoliated
using 45% (v/v) ethanol in water via sonication (80 kHz frequency,
100% power, and sweep mode) for 12 h.^{27 (link)} The temperature (30 °C) was controlled during sonication by
cooling the bath. The centrifugation process was then optimized for
conditions to consist of a first step at 3500 rpm (820g) for 15 min. The supernatant underwent a second step of centrifugation
at 4500 rpm (1700g) for 3 min. Thus, 2H-MoS₂ was collected in the form of a gray precipitate. Collected 2H-MoS₂ was washed with water, and the supernatant was discarded.
A bath sonicator (Elmasonic P60H ultrasonic cleaner) was used for
sonication, and an Eppendorf MiniSpin Plus microcentrifuge was used
for centrifugation.