Domain Expired. How Do I Safely Re-Post Articles On New Domain?

My domain name expired and I missed the grace period. I have all my old articles saved, about 123 of them. I know someone will probably snatch up my old domain because it had lots of backlinks going to it. I also know I'm starting from scratch without the juice of those backlinks going to my articles.

My concern is that some of my old pages are still indexed in Google. I don't know when Google will de-index them, so I'm unsure how to start again with my old articles without suffering a duplicate content penalty from Google if I put all the articles on a new site/new domain.

I'm worried that whoever snatches up my domain will try to re-use my old content as well, so I want to beat them to the punch before they have a chance to do that.

How should I go about this process in a SEO-safe way?

Thanks in advice.