Transcript PRESENTATION TITLE - Home - the Nano

3D Printing in the Classroom
Copyright © 2012 Board of Trustees, University of Illinois. All rights reserved.
Last modified 2/10/12
Today
• Learn about creating nano-sized 3-D objects
• Learn about polymerization and how it can be
initiated by light
• Learn how to use this technology to create
3-D objects
2
Micromanufacturing
• Current micromanufacturing methods make
relatively flat objects.
– Alignment of layers hard to
achieve
– Process very complex and
expensive
• Flat objects called 2-D or 2.5-D
Example of 2.5D objects
The Challenge: Lack truly 3-D microfabrication methods
The Solution: Microstereo Lithography
3
Micromanufacturing
• Micromanufacturing refers to methods used
to create structures of micrometer sizes or
smaller.
One micrometer, or micron, is
one-millionth of a meter ( 1.0x106 m )
One nanometer is one-billionth of
a meter ( 1.0x109 m )


50 microns
Micro Gears
Photonic Crystal
Bioreactor
4
3-Dimensional Printing
• Work of Professor
Nicholas Fang in
nanoscale optical
imaging
• Idea is to mimic a
complicated and
expensive lab
setup in an
inexpensive way.
• Uses equipment
normally found in
a school
classroom.
5
3-Dimensional Printing
• So, can’t take
$ 500,000
machine into
classroom –
what can
students do?
6
3-Dimensional Printing
computer with
PowerPoint image
magnifying glass
data
projector
product
(3-d object)
mirror
elevator
7
Light-Activated Polymer
• uv light reacts
with initiator to
create two
radicals.
• Radicals each
have single free
electron.
+
8
Light Activated Polymer
• Radical bonds
with monomer.
• Now single free
electron at end of
chain
+
9
Light Activated Polymer
• Repeats until two
ends with free
electrons interact
and bond.
+
10
11
12
13
14
15
16
17
18
19
Elevator Design
• Drawer slide provides
smooth movement.
• T-nut and threaded
screw controls motion.
20
Slicing the 3D Object
• 3D objects are
constructed by
slices.
• Overlapping
between layers is
generally
required.
21
Overhanging Structures?
• Amount of
Sudan I
determines
thickness of
layer.
Optical
absorption
depth
Optical
absorption
depth
22
What to Do
• Make black/white images.
• Set up system.
• Print!
23
Slicing the 3D Object
• Create each
different slice.
• Add blank slide to
advance elevator.
24
Sample
• To make a rectangular box…
25
Sample
• To make a rectangular box…
Repeat this
slide to
make a
taller
rectangular
cube
26
Alignment is Important
• Be sure each slide aligns.
• To align - copy slide, make modifications.
• Check properties.
27
Preparation Slides
• Polymer reacts with uv light.
• Polymer does NOT react with red light, but
we can see red.
• Red is good color to use for preparing an
apparatus.
28
Focus Slide
• Use a red complex image to focus.
29
Alignment Slide
• Make a red version of the largest image to
align.
30
Instructions
• Use red text for instructions.
Repeat 25 times
31
Final
• Put these elements together in one file.
32
Examples of Objects
33
Examples of Objects
34
Examples of Objects
35
Examples of Objects
36
Examples of Objects
37
Examples of Objects
38
Examples of Objects
39
Examples of Objects
40
Using Math
41
Student Objects
42
Student Objects
43
A Different Application!
44
One Layer at a Time
45
Mathematical Sculpture
46
Mathematical Sculptures
47
The Holy Grail
48
Engagement Ring!
49