EX-23.1 4 ex23-1.htm CONSENT OF RSM US LLP

Nanophase Technologies Corporation 10-K

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the Registration Statement (No.’s 333-53445, No. 333-74170, No. 333-119466, No. 333-150765 and No. 333-187649) on Form S-8 and Registration Statements (No. 333-90326, No. 333-116224, No. 333-140461, and No. 333-163363) on Form S-3 of Nanophase Technologies Corporation of our report dated March 30, 2020, relating to the consolidated financial statements of Nanophase Technologies Corporation, appearing in this Annual Report on Form 10-K of Nanophase Technologies Corporation for the year ended December 31, 2019.

/s/ RSM US LLP

Schaumburg, Illinois

March 30, 2020