I think self-destructing would be detrimental in this situation. If they were somewhat interested and wanted to show it to someone else in the same organization, they can't. Or if they wanted to take a closer look later at something that piqued their interest, they can't.
Also, the "double-click to see my work" seems a bit naive in this age of phishing emails from unsolicited senders. While no file format is exempt from the possibility of being a carrier for a phishing attack, my guess is that a standard format like PDF is probably a safe bet for something that nearly everyone can read. There are automated tools that can scan PDFs for malware, so that's another reason to use it.
A plain website link would also be a good choice, because the security-conscious can use a buttoned-down web-browser of their choice with relatively little risk.