January 29 2019 2DCC MIP Webinar Berry Mat Today 2016New questions in FlatlandOne of the most fundamental properties of matterHow it deforms under stress2004 Discovery of graphene How are de ID: 842498
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1 Extreme Straintronics of Graphene2DCCMIP
Extreme Straintronics of Graphene2DCCMIP Webinar29 January, 2019Riju BanerjeePenn State January 29, 2019 2DCC - MIP Webinar Berry, Mat. Today
2 (2016)New questions in FlatlandOne of th
(2016)New questions in FlatlandOne of the most fundamental properties of matter:How it deforms under stress2004: Discovery of graphene How are
3 deformations of atom thick materials dif
deformations of atom thick materials different from bulk? January 29, 2019 2DCC - MIP Webinar Graphene sustains strains �20%, while sil
4 icon breaks at 1.5%. How do materials de
icon breaks at 1.5%. How do materials deform under such extreme strains? mechanicalengineering.comNew questions in Flatland One of the most fun
5 damental properties of matter:How it def
damental properties of matter:How it deforms under stress2004: Discovery of graphene How are deformations of atom thick materials different fro
6 m bulk? January 29, 2019 2DCC - MIP Web
m bulk? January 29, 2019 2DCC - MIP Webinar Graphene sustains strains �20%, while silicon breaks at 1.5%. How do materials deform under
7 such extreme strains?Large Deformations
such extreme strains?Large Deformations also affect the electronic properties endowing certain versatility. Engineer novel electronic properti
8 es under extreme strain? Castro Netoet.
es under extreme strain? Castro Netoet. al., RMP (2009)Modify??New questions in FlatlandOne of the most fundamental properties of matter:How it
9 deforms under stress2004: Discovery of
deforms under stress2004: Discovery of graphene How are deformations of atom thick materials different from bulk? January 29, 2019 2DCC - MIP
10 Webinar Graphene sustains strains �
Webinar Graphene sustains strains �20%, while silicon breaks at 1.5%. How do materials deform under such extreme strains?Large Deformat
11 ions also affect the electronic properti
ions also affect the electronic properties endowing certain versatility. Engineer novel electronic properties under extreme strain?How are ripp
12 les in a lattice different from those in
les in a lattice different from those in a continuous fabric?mechanicalengineering.com New questions in FlatlandOne of the most fundamental pro
13 perties of matter:How it deforms under s
perties of matter:How it deforms under stress2004: Discovery of graphene How are deformations of atom thick materials different from bulk? Janu
14 ary 29, 2019 2DCC - MIP Webinar Graphen
ary 29, 2019 2DCC - MIP Webinar Graphene sustains strains �20%, while silicon breaks at 1.5%. How do materials deform under such extrem
15 e strains?Large Deformations also affect
e strains?Large Deformations also affect the electronic properties endowing certain versatility. Engineer novel electronic properties under ext
16 reme strain?How are ripples in a lattice
reme strain?How are ripples in a lattice different from those in a continuous fabric?mechanicalengineering.com New questions in FlatlandOne of
17 the most fundamental properties of matte
the most fundamental properties of matter:How it deforms under stress2004: Discovery of graphene How are deformations of atom thick materials d
18 ifferent from bulk? Take graphene, extre
ifferent from bulk? Take graphene, extreme strain and varyit at the nanoscale and probeeffects Traditional method of straining January 29, 2019
19 2DCC - MIP Webinar Pamela C. Burnley T
2DCC - MIP Webinar Pamela C. Burnley Traditional method of straining January 29, 2019 2DCC - MIP Webinar Pamela C. BurnleyDifficult for atom
20 thick materialsCannot measure/probe res
thick materialsCannot measure/probe resulting deformations and other physical properties down to atomic scale Engineering nanoscale ripples in
21 suspended graphene January 29, 2019 2D
suspended graphene January 29, 2019 2DCC - MIP Webinar row graphene on Copper Substrate with Step Edges Step Edges Preferred tool Scanning tu
22 nneling microscopy January 29, 2019 2DC
nneling microscopy January 29, 2019 2DCC - MIP Webinar Try to maintain constant current while scanningà change in z gives order of magnitude
23 change in Scanning tunneling microscope
change in Scanning tunneling microscope January 29, 2019 2DCC - MIP Webinar Scanning tunneling microscope January 29, 2019 2DCC - MIP Webina
24 r What does a STM ‘see’? Janua
r What does a STM ‘see’? January 29, 2019 2DCC - MIP Webinar Measures current local electron densitySharp tip sensitive to elect
25 ron density at subAngstrom length scale
ron density at subAngstrom length scale What does a STM ‘see’? January 29, 2019 2DCC - MIP Webinar Measures current local electr
26 on densitySharp tip sensitive to electro
on densitySharp tip sensitive to electron density at subAngstrom length scale Maps out topographic features by running a feedback loop on curre
27 nt Record how z needs to change to keepc
nt Record how z needs to change to keepconstantheight What does a STM ‘see’? January 29, 2019 2DCC - MIP Webinar Measures current
28 local electron densitySharp tip sensit
local electron densitySharp tip sensitive to electron density at subAngstrom length scaleMaps out topographic features by running a feedback
29 loop on current Record how z needs to ch
loop on current Record how z needs to change to keepconstantheightPristine Graphene lattice What does a STM ‘see’? January 29, 2019
30 2DCC - MIP Webinar Measures current
2DCC - MIP Webinar Measures current local electron densitySharp tip sensitive to electron density at subAngstrom length scaleMaps out topog
31 raphic features by running a feedback lo
raphic features by running a feedback loop on current Record how z needs to change to keepconstantheightDirac cone Pristine Graphene lattice Ja
32 nuary 29, 2019 2DCC - MIP Webinar Mecha
nuary 29, 2019 2DCC - MIP Webinar Mechanical properties Studying nanoscale deformations by STM January 29, 2019 2DCC - MIP Webinar Levy, et.
33 al Science (2010) Xu, et. al Nano. Lett
al Science (2010) Xu, et. al Nano. Lett (2010) Yeh, et. al Surf.Sci(2011)Bao, et. al Nat.Nano(2009) Tapaszto, et. al Nat. Phys. (2012) Zhu, et.
34 al PRB(2014) Experimental Nanoscale Str
al PRB(2014) Experimental Nanoscale Strain Manipulation still in its InfancyEngineering at nm scale is hard and Wrinkling is inherently somewh
35 at messy/ÄÄÄůůÇÍK
at messy/ÄÄÄůůÇÍKŶÄÆƵÆÆÄŶÄÄÄÆÅÄÄÆÍÇÄÆÇÍŵÄÄÆƵÆÄ�
36 03;ÄŶÄÆÄůÄÆÄÇÄ
03;ÄŶÄÆÄůÄÆÄÇÄÇÄůÄŶÅÆÅÊÍŵÆůÅÆƵÄÄÍƵÆÇÄÆƵÆÄ
37 This Talk! Sculpting atomic step edges J
This Talk! Sculpting atomic step edges January 29, 2019 2DCC - MIP Webinar Graphene pushes Cu to form higher step edges Our samples grown by T
38 .G. Nakajima, (Terronesgroup) Extreme st
.G. Nakajima, (Terronesgroup) Extreme strain measurement January 29, 2019 2DCC - MIP Webinar Measured stra�in 10%, consistent with firs
39 t principle calculations Ripples in a cl
t principle calculations Ripples in a classical fabric January 29, 2019 2DCC - MIP Webinar Ripples form due to compressive stress tÄÇÄůÄÅ
40 ¶ÅÆÅÊÎ�
¶ÅÆÅÊÎŵÆůÅÆƵÄÄtÄÇÄůÄŶÅÆÅÊÎÏͬŵÆůÅÆ
41 ƵÄÄDirect Applicatio
ƵÄÄDirect ApplicationIndirectly by Poisson Compression Cerda et. al, PRL , (2003) Nanoscale graphene ripples local curvatu
42 re January 29, 2019 2DCC - MIP Webinar
re January 29, 2019 2DCC - MIP Webinar Nanoscale graphene ripples Draping angle January 29, 2019 2DCC - MIP Webinar zx Conserved draping angl
43 e 35 Nanoscale graphene ripples Rippling
e 35 Nanoscale graphene ripples Rippling angle January 29, 2019 2DCC - MIP Webinar ÎÏϲϴ Nanoscale graphene ripples Beyond classical theory
44 January 29, 2019 2DCC - MIP Webinar Cl
January 29, 2019 2DCC - MIP Webinar Classically, Classical theory of rippling assumes thick, continuous material possible breakdown fo