The information provided here is intended to complement work that has already been published by providing details that we have found helpful. This page is in no way intended to replace on-the-job training. Be sure to read all Safety Data Sheets and understand the hazards of this type of chemistry before proceeding.

Use(s) of Material

Copper selenide nanocrystals have been used to create thin-film thermoelectric devices. This material is interesting because it has inherently low thermal conductivity and displays very interesting and complicated phase behavior.

This recipe will produce non-stochiometric copper selenide, Cu2-xSe, x < 0. If you want to make close to stochiometric copper selenide, you need to do all washing steps in an air-free way. Good luck.

Chemical List

selenium (powder 100 mesh, 99.99%)
copper(I) chloride (powder, 99%)

oleic acid (OA, technical grade, 90%)
1-octadecene (ODE, technical grade, 90%)
oleylamine (OAm, technical grade, 70% from Sigma Aldrich)
anhydrous hexane (> 99.8% from DriSolv)
anhydrous ethanol (200 proof from EMD Millipore Chemicals)

hexane (>= 98.5%)
toluene (>= 99.5%)

Equipment List

50 mL 3 neck round bottom flask (1)
25 mL 3 neck round bottom flask (1)
air-free adaptor (2, or 1 if you are washing the particles in air)
stirbars (2)
glass condenser (2)
flask septa, 2 silicone, 2 red rubber (4 total)
10 mL glass syringe with long needle (1)
Temperature controller with thermocouple and heating mantle (x2)
Schlenk Line (2 drops needed)