Can't print Î in bold in GTK labels

[Anoop <anoop_gecb yahoo co in>]

Hello,
I am writing a program that prints the resistance value in bold red
colour. Please see the following snippet:

final_result = g_markup_printf_escaped("<span foreground=\"red\"
weight=\"bold\" size=\"xx-large\"> %sÂ%.2f </span>",result,tolerance);
gtk_label_set_markup(GTK_LABEL(label_Output),final_result);

where the variable "result" will contain something like 20KÎ and
tolerance will contain something like 0.25%. What I intend, is to print
"20KÎÂ0.25%" in bold red.
But the problem is only 20K appears in bold and the remaining is not.
The problem vanishes once i decide to use the word "Ohms" instead of
symbol "Î". Why is this so? Am I doing something wrong? How can I print
Î in bold?
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