Science - USA (2021-07-16)

SCIENCEsciencemag.org 16 JULY 2021•VOL 373 ISSUE 6552 323

(100)

(001)

(010)

A B

C

F G H

0.3 V

0.0

0.6

1.0 V

D E

1.92 Å1.92

Å

2.22

Å

2.22 Å

1.99 Å1.9

9 Å

1.88 Å1.8

(^8) Å
1.86 Å (^1) .86 Å 1.94 Å1.94 Å
2.08 Å 2 .08 Å
1.99 Å1.99 Å
15 μm 15151515555 μmμμmμmμmμmmmmmmmmmmmmmmmmmmm
Deg
220
80
180
120
15 μm
702 nm
255 nm
5 μm 5 μm
KPFM
(100)(100)
(010)(010)
(001)(001)
b
a
nm
15 μm
pm
150
100
50
(001)
2.2 V
9.0 V
1 μm
PFM
(100)(100)
(010)
(001)
KPFM
nmnm
15 μm
20
-20
10
-10
0

Fig. 2. Structure and physical properties of crystal 1.(A) An ordered 1D water chain traverses the crystal length, bridging the bipyrazole molecules of 1.
(B) Crystal packing in theabplane, showing water channels (red circles) and hydrophobic zones formed by close-packed methyl groups (blue circle).
(CtoE) Topography (C), piezo response amplitude image (D), and phase image (E) obtained from PFM on the (100)/(010) face of the crystal. (FandG) Topography
image (F) and surface potential map (G) obtained from KPFM experiments on the crack line of an imperfectly healed crystal. (H) Surface potential image
obtained from a fresh fracture surface, (001) face.

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