Tailoring SAM on SAM...
Transcript of Tailoring SAM on SAM...
![Page 1: Tailoring SAM on SAM formationstatic.sif.it/SIF/resources/public/files/congr12/invited/Cossaro.pdf · Albano Cossaro Alberto Verdini Martina dell’Angela (now at Hamburg Universitat)](https://reader034.fdocuments.in/reader034/viewer/2022042123/5e9ec23c8ff0726eff2d1bbf/html5/thumbnails/1.jpg)
Tailoring SAM on SAM formation
A. Cossaro CNR-IOM
Trieste
![Page 2: Tailoring SAM on SAM formationstatic.sif.it/SIF/resources/public/files/congr12/invited/Cossaro.pdf · Albano Cossaro Alberto Verdini Martina dell’Angela (now at Hamburg Universitat)](https://reader034.fdocuments.in/reader034/viewer/2022042123/5e9ec23c8ff0726eff2d1bbf/html5/thumbnails/2.jpg)
ALOISA beamline
ALOISA
H energy range: 120-8000 eV
High Resolution Photoemission Spectroscopy
X-Ray Photoelectron Diffraction
Grazing Incidence X-Ray Diffraction
X-Ray Reflectivity
Absorption Spectroscopy
Photoemission Coincidence Spectroscopy
Luca Floreano
Albano Cossaro
Alberto Verdini
CNR-IOM
Alberto Morgante Dean Cvetko
Gregor Bavdek
Gregor Kladnik CNR-IOM
Università di Trieste Ljubljana University
Elettra, Trieste
![Page 3: Tailoring SAM on SAM formationstatic.sif.it/SIF/resources/public/files/congr12/invited/Cossaro.pdf · Albano Cossaro Alberto Verdini Martina dell’Angela (now at Hamburg Universitat)](https://reader034.fdocuments.in/reader034/viewer/2022042123/5e9ec23c8ff0726eff2d1bbf/html5/thumbnails/3.jpg)
Metal-organic interfaces
Electronic transport efficiency
System reliability
SAM interposition
I. Kymissis et al. IEEE 2001
Homogeneous interface morphology
Improved electronic transport
dock
head
SH N Se
NH2 OH COOH
Heimel et al. NanoLetters 2007
Tailoring of the Work Function
Electronic levels alignment
![Page 4: Tailoring SAM on SAM formationstatic.sif.it/SIF/resources/public/files/congr12/invited/Cossaro.pdf · Albano Cossaro Alberto Verdini Martina dell’Angela (now at Hamburg Universitat)](https://reader034.fdocuments.in/reader034/viewer/2022042123/5e9ec23c8ff0726eff2d1bbf/html5/thumbnails/4.jpg)
Control on the growth
In-situ X-ray spectroscopy
Modelling the junction as
sum of sub-units
Our approach
SAM
Organic film
film-film
UHV
molecule-molecule
functionalization
NH2
COOH
aminoacids self-assembly
ω-alkanethiols on Au(111)
Dense packing
Thermal stability
Homogeneity
![Page 5: Tailoring SAM on SAM formationstatic.sif.it/SIF/resources/public/files/congr12/invited/Cossaro.pdf · Albano Cossaro Alberto Verdini Martina dell’Angela (now at Hamburg Universitat)](https://reader034.fdocuments.in/reader034/viewer/2022042123/5e9ec23c8ff0726eff2d1bbf/html5/thumbnails/5.jpg)
The NH2-COOH chemical affinity
L-methionine
on Ag(111)
in coll. with J. Barth PNAS 2007
L-tyrosine
on Ag(111)
ACS Nano 2010
![Page 6: Tailoring SAM on SAM formationstatic.sif.it/SIF/resources/public/files/congr12/invited/Cossaro.pdf · Albano Cossaro Alberto Verdini Martina dell’Angela (now at Hamburg Universitat)](https://reader034.fdocuments.in/reader034/viewer/2022042123/5e9ec23c8ff0726eff2d1bbf/html5/thumbnails/6.jpg)
The NH2-COOH chemical affinity
L-methionine L-tyrosine
N1s O1s
NH3+ COO-
molecules in their zwitterionic form
COO--NH3+
interaction drives the formation
of templates of biomolecules
Cysteamine / Au(111)
Benzoic Acid
![Page 7: Tailoring SAM on SAM formationstatic.sif.it/SIF/resources/public/files/congr12/invited/Cossaro.pdf · Albano Cossaro Alberto Verdini Martina dell’Angela (now at Hamburg Universitat)](https://reader034.fdocuments.in/reader034/viewer/2022042123/5e9ec23c8ff0726eff2d1bbf/html5/thumbnails/7.jpg)
1. Functionalization : in-situ CA monolayer formation
J. Phys. Chem. C (2010)
C1s N1s
NH2
S2p
Thiolate bond
gauche defects or
lying down CA
XPS
N1s
NEXAFS
Standing-up
![Page 8: Tailoring SAM on SAM formationstatic.sif.it/SIF/resources/public/files/congr12/invited/Cossaro.pdf · Albano Cossaro Alberto Verdini Martina dell’Angela (now at Hamburg Universitat)](https://reader034.fdocuments.in/reader034/viewer/2022042123/5e9ec23c8ff0726eff2d1bbf/html5/thumbnails/8.jpg)
2. Anchoring: Benzoic Acid Deposition on CA
High anchoring efficiency J. Phys. Chem. Lett. 2011
NH3+-COO- bond formation
![Page 9: Tailoring SAM on SAM formationstatic.sif.it/SIF/resources/public/files/congr12/invited/Cossaro.pdf · Albano Cossaro Alberto Verdini Martina dell’Angela (now at Hamburg Universitat)](https://reader034.fdocuments.in/reader034/viewer/2022042123/5e9ec23c8ff0726eff2d1bbf/html5/thumbnails/9.jpg)
2. Anchoring: Benzoic Acid Deposition on CA
J. Phys. Chem. Lett. 2011
most of BA are anchored
anchoring changes the adsorption geometry
![Page 10: Tailoring SAM on SAM formationstatic.sif.it/SIF/resources/public/files/congr12/invited/Cossaro.pdf · Albano Cossaro Alberto Verdini Martina dell’Angela (now at Hamburg Universitat)](https://reader034.fdocuments.in/reader034/viewer/2022042123/5e9ec23c8ff0726eff2d1bbf/html5/thumbnails/10.jpg)
Bi-dentate anchoring:TPA vs BA
PCCP 2012
Morphology changes by selecting
the number of anchoring groups
TPA: lying down adsorption
bi-dentate anchoring
vs
![Page 11: Tailoring SAM on SAM formationstatic.sif.it/SIF/resources/public/files/congr12/invited/Cossaro.pdf · Albano Cossaro Alberto Verdini Martina dell’Angela (now at Hamburg Universitat)](https://reader034.fdocuments.in/reader034/viewer/2022042123/5e9ec23c8ff0726eff2d1bbf/html5/thumbnails/11.jpg)
Spectroscopy STM Imaging
STS - conductance
Carlo Dri, Università di Trieste
Resonant Photoemission
DFT Amino-carboxylic bond
Covalent bond formation
New approach for device design
irradiation
The ANCHOR project FIRB Futuro in ricerca 2010
![Page 12: Tailoring SAM on SAM formationstatic.sif.it/SIF/resources/public/files/congr12/invited/Cossaro.pdf · Albano Cossaro Alberto Verdini Martina dell’Angela (now at Hamburg Universitat)](https://reader034.fdocuments.in/reader034/viewer/2022042123/5e9ec23c8ff0726eff2d1bbf/html5/thumbnails/12.jpg)
Resonant X-Ray Photoemission
2. non radiative decay channels 1.Resonant excitation
Quenching of the resonance
in the Valence Band
Normal Auger Decay
![Page 13: Tailoring SAM on SAM formationstatic.sif.it/SIF/resources/public/files/congr12/invited/Cossaro.pdf · Albano Cossaro Alberto Verdini Martina dell’Angela (now at Hamburg Universitat)](https://reader034.fdocuments.in/reader034/viewer/2022042123/5e9ec23c8ff0726eff2d1bbf/html5/thumbnails/13.jpg)
Resonant Photoemission: first results
C1s edge
Quenching of the resonance
due to the anchoring process
Evidence of BA/Au electronic transport
mediated by CA
Gas phase
![Page 14: Tailoring SAM on SAM formationstatic.sif.it/SIF/resources/public/files/congr12/invited/Cossaro.pdf · Albano Cossaro Alberto Verdini Martina dell’Angela (now at Hamburg Universitat)](https://reader034.fdocuments.in/reader034/viewer/2022042123/5e9ec23c8ff0726eff2d1bbf/html5/thumbnails/14.jpg)
Luca Floreano
Albano Cossaro
Alberto Verdini
Martina dell’Angela
(now at Hamburg Universitat)
CNR-IOM
Alberto Morgante
Michele Puppin
(now at Fritz Haber, Berlin)
Dean Cvetko
Gregor Kladnik
CNR-IOM
Università di Trieste
Ljubljana University
ALOISA GAS PHASE Monica DeSimone
Antti Kivimäky
CNR-IOM
Marcello Coreno
CNR-IMIP
Università di Genova
Maurizio Canepa
MIUR Futuro in Ricerca Prot. RBFR10FQBL
![Page 15: Tailoring SAM on SAM formationstatic.sif.it/SIF/resources/public/files/congr12/invited/Cossaro.pdf · Albano Cossaro Alberto Verdini Martina dell’Angela (now at Hamburg Universitat)](https://reader034.fdocuments.in/reader034/viewer/2022042123/5e9ec23c8ff0726eff2d1bbf/html5/thumbnails/15.jpg)