Exploratory Notice To Verify The Uniqueness Of The Supplier For A Negotiated Procedure Without Publication Of A Notice Pursuant To Art. 76, C. 2, L. B), P. 2, Of The Legislative Decree. 36/2023 For The Supply Of Scientific Equipment For The Deposition (Sputtering) Of Thin Metallic And Insulating Films Including Installation And Operationalization For The Physics Department