Direct observation of step-edge barrier effects and general aspects of growth processes: morphology and structure in diindenoperylene thin films deposited on Au(100) single crystals

被引：11

作者：

Casu, Maria Benedetta ^{[1
]}

Savu, Sabine-Antonia ^{[1
]}

Hoffmann, Patrick ^{[2
]}

Schuster, Britt-Elfriede ^{[1
]}

Mentes, Tevfik Onur ^{[3
]}

Angel Nino, Miguel ^{[3
,4
]}

Locatelli, Andrea ^{[3
]}

Chasse, Thomas ^{[1
]}

机构：

[1] Univ Tubingen, Inst Phys & Theoret Chem, D-72076 Tubingen, Germany

[2] Helmholtz Zentrum Berlin Mat & Energie GmbH, D-12489 Berlin, Germany

[3] Sincrotrone Trieste SCpA, I-34012 Basovizza Trieste, Italy

[4] Inst Madileno Estudios Avanzados IMDEA Nanocienci, Madrid 28049, Spain

来源：

CRYSTENGCOMM | 2011年 / 13卷 / 12期

关键词：

MOLECULAR-ORIENTATION; ELECTRON-MICROSCOPY; MONOLAYERS; AG(111); PTCDA;

D O I：

10.1039/c0ce00951b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We investigate thin films of diindenoperylene deposited on Au(100) single crystals by using real time in situ low energy electron microscopy (LEEM) in synergy with X-ray photoelectron spectroscopy (XPS), and near edge X-ray absorption fine structure (NEXAFS) spectroscopy. We find evidence for Stranski-Krastanov growth, with island nucleation prevalently at step bunches, and a lower probability of island nucleation at terraces. We also directly observe the effect of the Ehrlich-Schwoebel barrier at the substrate and in the film morphology, in particular inside the islands that show a non-homogeneous thickness due to a rough front growth, because of the additional energy required for the diffusing molecules to surmount a downward step.

引用

页码：4139 / 4144

页数：6

共 35 条

[1] Quantum size effect in low energy electron diffraction of thin films [J].

Altman, MS ;

Chung, WF ;

He, ZQ ;

Poon, HC ;

Tong, SY .

APPLIED SURFACE SCIENCE, 2001, 169 :82-87

[2] LOW-ENERGY-ELECTRON MICROSCOPY [J].

BAUER, E .

REPORTS ON PROGRESS IN PHYSICS, 1994, 57 (09) :895-938

[3]

Bauer E., 1958, Z KRISTALLOGR, V110, P395, DOI [10.1524/zkri.1958.110.1-6.395, DOI 10.1524/ZKRI.1958.110.1-6.395]

[4] Initial molecular orientation of phthalocyanines on oxide substrates [J].

Biswas, Indro ;

Peisert, Heiko ;

Casu, Maria Benedetta ;

Schuster, Britt-Elfriede ;

Nagel, Peter ;

Merzz, Michael ;

Schuppler, Stefan ;

Chasse, Thomas .

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 2009, 206 (11) :2524-2528

[5] Morphology of perylene thin films on SiOx/Si(100) and SiO2/Si(100): A spectroscopic and microscopic study of the influence of the preparation parameters [J].

Casu, M. B. ;

Yu, X. ;

Schmitt, S. ;

Heske, C. ;

Umbach, E. .

CHEMICAL PHYSICS LETTERS, 2009, 479 (1-3) :76-80

[6] Photoemission electron microscopy of diindenoperylene thin films [J].

Casu, M. B. ;

Biswas, I. ;

Nagel, M. ;

Nagel, P. ;

Schuppler, S. ;

Chasse, T. .

PHYSICAL REVIEW B, 2008, 78 (07)

[7] Molecular orientation in diindenoperylene thin films deposited on polycrystalline gold [J].

Casu, M. B. ;

Biswas, I. ;

Schuster, B. -E. ;

Nagel, M. ;

Nagel, P. ;

Schuppler, S. ;

Chasse, T. .

APPLIED PHYSICS LETTERS, 2008, 93 (02)

[8] Influence of the preparation conditions on the morphology of perylene thin films on Si(111) and Si(100) [J].

Casu, M. B. ;

Yu, X. ;

Schmitt, S. ;

Heske, C. ;

Umbach, E. .

JOURNAL OF CHEMICAL PHYSICS, 2008, 129 (24)

[9] Nucleation in Organic Thin Film Growth: Perylene on Al2O3/Ni3Al(111) [J].

Casu, M. Benedetta ;

Schoell, Achim ;

Bauchspiess, K. Rudolf ;

Huebner, Dominique ;

Schmidt, Thomas ;

Heske, Clemens ;

Umbach, Eberhard .

JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (25) :10990-10996

[10] Locally Resolved Core-hole Screening, Molecular Orientation, and Morphology in Thin Films of Diindenoperylene Deposited on Au(111) Single Crystals [J].

Casu, Maria Benedetta ;

Schuster, Britt-Elfriede ;

Biswas, Indro ;

Raisch, Christoph ;

Marchetto, Helder ;

Schmidt, Thomas ;

Chasse, Thomas .

ADVANCED MATERIALS, 2010, 22 (33) :3740-+

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