Calcium carbonate crystallisation at charged graphite surfaces

2017 ◽  
Vol 53 (93) ◽  
pp. 12552-12555 ◽  
Author(s):  
E. R. Ravenhill ◽  
M. Adobes-Vidal ◽  
P. R. Unwin
Keyword(s):  
Calcium Carbonate ◽  
Surface Charge ◽  
Crystal Orientation ◽  
Substrate Surface ◽  
Pyrolytic Graphite ◽  
Highly Oriented Pyrolytic Graphite

For identical solution conditions, the crystallisation of calcium carbonate (polymorph and crystal orientation) at Highly Oriented Pyrolytic Graphite substrates is highly dependent on substrate surface charge.

STM STUDY OF A SELF-ASSEMBLY BEHAVIOR OF PHTHALOCYANINE AND 1-BROMOHEXADECANE ON HIGHLY ORIENTED PYROLYTIC GRAPHITE

2006 ◽  
Vol 05 (06) ◽  
pp. 877-882
Author(s):  
WU YANG ◽  
WEILIAN LV ◽  
LILI BO ◽  
XIAOYAN HE ◽  
GANG NI ◽  
...  
Keyword(s):  
Self Assembly ◽  
Substrate Surface ◽  
Pyrolytic Graphite ◽  
Molar Ratio ◽  
Highly Oriented Pyrolytic Graphite ◽  
Molar Ratios ◽  
Molecular Features ◽  
Planar Molecules ◽  
Assembly Behavior ◽  
Stm Images

In this paper, we present the results of using alkane derivatives to assist in the adsorption of planar molecules by employing 1-bromohexadecane( C 16 Br ) and phthalocyanine (Pc) as examples. Their assembly behaviors have been well resolved on the observed STM images. The observations presented in this work demonstrate that single molecular arrays of Pc can be obtained with a template of C 16 Br on highly oriented pyrolytic graphite (HOPG) substrate surface to allow high-resolution STM studies. Binary mixtures of different molar ratios were also observed. By adjusting the molar ratio of Pc to C 16 Br to about 1:3–1:4, uniform assembly can become dominative on the surface. The resulting high stability and the well ordered assembly are attributed to the increased adsorption barrier of alkanes. This approach could be adapted to the studies of other molecules to observe molecular features and could be helpful in obtaining two-dimensional assemblies of monodispersed molecules, especially planar molecules.

Effects of Wet Chemical Oxidation on Surface Functionalization and Morphology of Highly Oriented Pyrolytic Graphite

2020 ◽  
Author(s):  
Mikhail Trought ◽  
Isobel Wentworth ◽  
Timothy Leftwich ◽  
Kathryn Perrine
Keyword(s):  
Surface Functionalization ◽  
Functional Group ◽  
Pyrolytic Graphite ◽  
Surface Oxidation ◽  
Chemical Oxidation ◽  
Synthesis Methods ◽  
Acid Solutions ◽  
Highly Oriented Pyrolytic Graphite ◽  
Wet Chemical ◽  
Surface Morphologies

The knowledge of chemical functionalization for area selective deposition (ASD) is crucial for designing the next generation heterogeneous catalysis. Surface functionalization by oxidation was studied on the surface of highly oriented pyrolytic graphite (HOPG). The HOPG surface was exposed to with various concentrations of two different acids (HCl and HNO3). We show that exposure of the HOPG surface to the acid solutions produce primarily the same -OH functional group and also significant differences the surface topography. Mechanisms are suggested to explain these strikingly different surface morphologies after surface oxidation. This knowledge can be used to for ASD synthesis methods for future graphene-based technologies.

Functionalized 4,4′-Bipyridines: Synthesis and 2D Organization on Highly Oriented Pyrolytic Graphite

2021 ◽  
Vol 86 (4) ◽  
pp. 3356-3366
Author(s):  
Jimmy Richard ◽  
Jean Joseph ◽  
Can Wang ◽  
Artur Ciesielski ◽  
Jean Weiss ◽  
...  
Keyword(s):  
Pyrolytic Graphite ◽  
Highly Oriented Pyrolytic Graphite

Quantized electronic structure and growth of Pb films on highly oriented pyrolytic graphite

2008 ◽  
Vol 78 (23) ◽  
Author(s):  
Y. Liu ◽  
J. J. Paggel ◽  
M. H. Upton ◽  
T. Miller ◽  
T.-C. Chiang
Keyword(s):  
Electronic Structure ◽  
Pyrolytic Graphite ◽  
Highly Oriented Pyrolytic Graphite
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