These instruction apply to everything under $5000.
There are certain items which get used by everyone in the lab, which need to get replaced regularly. Examples include:
It is the responsibility of everyone in the lab to make sure that these items do not run out. There is nothing suckier than getting stuck mid-process because someone else neglected to get a new bottle of acetone. If you use something up, replace it immediately.
Since we use so much solvent, we always keep 2 bottles of Acetone and IPA on hand. If you run out of one of these solvents, or need a more exotic chemical, chances are that you will be able to find it in the Chemistry stockroom. The chemistry stockroom is on the first floor of baker lab. You need to bring one of the black rubber carriers with you to transport the chemicals. I suggest wearing a glove on your non writing hand, so that you don't have to actually touch the chemicals. The chemicals are in the back room of the chemistry stockroom, separated by solvents and acids. On your way out, fill out the paper Purchasing form. Make sure to enter the number on the sticker with a barcode on the bottle, even though there is not explicitly a spot for that information on the form; also write the room number where the bottle will be kept (Clark C5). When the bottle is empty, put the sticker on the form on our chemical storage drawer.
One lab consumable that needs to be maintained are the gas cylinders used in nanotube growth and in various experiments throughout the lab. If you use up a gas cylinder, or find it empty, you MUST replace the cylinder and buy a new one. The procedure is the following:
1. The gas storage rooms are in the hallway by the loading dock, and there should be a gas cylinder cart nearby. You need a stockroom key in order to get in to the storage room. Look at the red tags on the cylinders. Each tag has the PI's name and the gas type. Select the gas that you need, load it into the cart, and bring it to the lab.
2. Usually it is easier to have two people when changing cylinders if there is any piping attached. Before removing the piping, be sure to COMPLETELY discharge the cylinder through whatever exhaust is available. Move the old tank far out of the way, carefully. Then install the new tank.
3. Using the cart, take the discharged cylinder out to the loading dock. There are 2 stacks of cylinders. The one on the right (while facing the building), furthest out from the building is for discharged cylinders. Using the chain, lock the cylinder down with the rest of the empty cylinders. The company will pick up the cylinder with its next shipment.
4. It is easy to buy new tanks, and absolutely necessary. a. Go to the airgas website: www.airgas.com
b. Find the part number for the size/purity of the gas you want. If you are unsure, try to look at the gas tank you're replacing, it often has a label. The size is generally “300”.
c. After selecting the types and numbers of cylinders that you want. Now fill out a standard webreq form: http://purchasing-prod.cit.cornell.edu/WEBREQ/WEBFORM.jsp?formtype=0. In the shipping field choose C-5 Clark. Remember to turn in the PO when the cylinder arrives.
5. When the cylinder arrives, the building staff will put a invoice in the Chem room. It is your responsibility to go check that the cylinder put into the loading dock is what we want, put it into the cylinder storage room, and take the invoice to the stockroom.
Current Supplies:
In Clark cylinder room:
8 Nitrogen
2 Argon
2 Helium
1 Hydrogen
In Service corridor:
2 Hydrogen (1 partial)
2 Nitrogen (1 empty)
We need a blurb about which AFM tips to get. Could someone add this.
The stockroom website is: http://www.lassp.cornell.edu/stockroom/ you can get a key for the stockroom from Dave Bowman, so that you can go in at odd hours.
For single crystal copper, visit MTI For copper foil, Alfa Aesar get 25 um copper foil. Cat#13382
We get our quartz tubes from QSI, http://www.qsiquartz.com/ 819 East Street Fairport Harbor, OH 44077 800.229.2186
We get quartz tubing, 22mm inside diameter, 25mm outside diameter, 4' long. They're around $40/ea without fire-polishing. We've started getting fire-polished tubes because they kept sending us tubes with hairline cracks, which we don't feel comfortable using for processes involving gases. You can probably use them for air anneals, but in general we've had to throw out a rather high number of tubes. The number varies by shipment, but the risk makes me think that it's definitely worth getting the good ones, even though it costs more.
You must specify that you want the tubes fire-polished in the comments when you request a quote. They cost $60 each.