Tweet share or send to Button with custom Icon

We can use custom images in Tweet button.
<script type=”text/javascript” src=”//platform.twitter.com/widgets.js”></script>
<a href=”https://twitter.com/intent/tweet?text=Find me in Unii.com”> <img src=”<?php echo $this->baseurl(‘images/smarttips-twitter.png’); ?>” width=”203″ height=”78″ border=”0″></a>