**4. Conclusions**

In the light of recent literature herein reported, microbial nanotechnology is a fascinating and booming field for future breakthrough nanomaterial synthesis. Through a 'green' and sustainable approach, microbial nanotechnology can really spur innovation in nanomanufacturing with a potential strong impact in several fields, including sensoristics and biomedicine.

**Author Contributions:** Conceptualization, G.G.; writing—original draft preparation, G.G., D.Z., R.D.; writing—review and editing, G.G., D.Z., R.D.; visualization, G.G., D.Z., R.D.; supervision, R.D. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Conflicts of Interest:** The authors declare no conflict of interest.
