Minot Lab Wiki

• Check that the gas cylinders are all on and have plenty of gas (the pressure inside a full cylinders is about 1500 psi).
• Open furnace lid. Open growth tube carefully. Place sample within growth tube. Use the quartz push rod to slide the sample to the center of the furnace.
• Close growth tube. Establish vacuum seals to the quartz tube. Close furnace lid.
• Set purge parameters in automated program.
• Make sure furnace and power supplies are on.
• If you are doing alcohol growth add ice and water to the beakers that the bubblers are in.
• Press the start button on the automated growth display panel.
• Allow system to cycle.
• Set growth parameters in automated growth program.
• Press the start button on the automated growth display panel.
• Allow system to cycle.
• At 400C, safe to open furnace lid (speeds up cooling process)
• At 200C, safe to handle growth tube and retrieve sample.

• Purge Parameters

1. Anneal temperature = 100C
2. Anneal time = 10 minutes
3. Anneal gases (if alcohol growth is planned) = 0.45 SLM Hydrogen, 0.30 SLM Methanol, 0.15 SLM Ethanol, and 0.50 SLM Argon
4. Anneal gases (if other recipe is planned) = growth gases and flow rates, and 0.5 SLM Argon
5. Growth temperature = 0C
6. Growth time = 0 minutes
7. Growth gases = 0 and uncheck all gases (check “neither”)

• Alcohol Growth Parameters

1. Anneal temperature = 800C
2. Anneal time = 15 minutes
3. Anneal gas = Atmosphere
4. Growth temperature = 900C
5. Growth time = 15 minutes
6. Growth gases = 0.45 SLM Hydrogen, 0.30 SLM Methanol, and 0.15 SLM Ethanol

• Methane Growth Parameters (suggested by McEuen group)

1. Anneal temperature = 550C
2. Anneal time = 5 minutes
3. Anneal gas = Atmosphere
4. Growth temperature = 825C
5. Growth time = 60 miniutes
6. Growth gases = 1.9 SLM Methane, 0.3 SLM Hydrogen

Growth Success Table