In situ on-surface single-atom editing from NHT to NHC SAM reconfigures molecular cores and interfacial bonding with atomic precision. ABSTRACT N-Heterocyclic carbene (NHC) self-assembled monolayers (SAMs) are emerging as robust and versatile surface ligands, yet their direct on-surface construction with atomic precision remains elusive. Here, we report a reagent-free, thermally driven on-surface strategy for single-atom editing, providing an alternative to convert a heteroatom-anchored SAM into a functional NHC layer. N-Heterocyclic thiourea (NHT) with carefully chosen substituents undergoes a S-to-metal adatom exchange, yielding adatom-bound NHC on coinage metal surfaces. Using low-temperature scanning tunneling microscopy (LT-STM), synchrotron-radiation X-ray photoelectron spectroscopy (SR-XPS), time of flight secondary ion mass spectrometry (ToF-SIMS) and density functional theory (DFT), we identify two distinct classes of SAMs: (i) NHT-SAM, in which sulfur coordinates to the metal surface and (ii) NHC-SAM, characterized by M─C σ-bonds between the carbene center and a surface adatom. NHT undergoes a clean SAM-to-SAM conversion, achieving covalent single-atom editing within an intact monolayer. DFT calculations show this transformation is energetically favorable and highly tunable by substrates and N-substituents, establishing a general framework for atom-precise molecular editing at surfaces.

Staphylococcus aureus is a leading cause of antibiotic-resistant infections worldwide. Therefore, there is a constant need to develop new growth inhibitors. Pentamidine analogs (PAs) composed of thiourea-linked...

This work explores a chemical bath deposition (CBD) route to fabricate cadmium sulfide-selenide (CdSxSe1-x) solid solution films with tunable composition and properties for optoelectronics. Theoretical calculations of the boundary conditions for the CdS and CdSe formation in the citrate-ammonia-thiourea-selenosulfate system were made. The boundary conditions of CdSxSe1-x were defined by the overlap area between the constructed CdS and CdSe formation zones. Single-phase CdSxSe1-x films were successfully deposited at a cadmium salt concentration of 0.005 mol/L and a thiourea concentration of 0.05 mol/L, with sodium selenosulfate concentrations varying from 0.001 to 0.025 mol/L, corresponding to (NH2)2CS: Na2SeSO3 molar ratios of 50 : 1, 20 : 1, 10 : 1, 5 : 1, and 2 : 1, as confirmed by XRD analysis.

In situ on-surface single-atom editing from NHT to NHC SAM reconfigures molecular cores and interfacial bonding with atomic precision. ABSTRACT N-Heterocyclic carbene (NHC) self-assembled monolayers (SAMs) are emerging as robust and versatile surface ligands, yet their direct on-surface construction with atomic precision remains elusive. Here, we report a reagent-free, thermally driven on-surface strategy for single-atom editing, providing an alternative to convert a heteroatom-anchored SAM into a functional NHC layer. N-Heterocyclic thiourea (NHT) with carefully chosen substituents undergoes a S-to-metal adatom exchange, yielding adatom-bound NHC on coinage metal surfaces. Using low-temperature scanning tunneling microscopy (LT-STM), synchrotron-radiation X-ray photoelectron spectroscopy (SR-XPS), time of flight secondary ion mass spectrometry (ToF-SIMS) and density functional theory (DFT), we identify two distinct classes of SAMs: (i) NHT-SAM, in which sulfur coordinates to the metal surface and (ii) NHC-SAM, characterized by M─C σ-bonds between the carbene center and a surface adatom. NHT undergoes a clean SAM-to-SAM conversion, achieving covalent single-atom editing within an intact monolayer. DFT calculations show this transformation is energetically favorable and highly tunable by substrates and N-substituents, establishing a general framework for atom-precise molecular editing at surfaces.

Researchers developed a thiourea-derived surface treatment that combines a sub-nanometer sulfur-rich coating with a spinel-like layer to protect lithium-rich manganese oxide cathodes and accelerate li...

Market size was valued at USD 150 Million in 2024 and is poised to grow from USD 165 Million in 2025 to USD 290 Million by 2033, growing at a CAGR of 7.4% during the forecast period 2026-2033.

📥 Download Sample 💰 Get Special Discount United States High Purity Thiourea Market Size, Share & Forecast 2026-2033 Market size (2024): USD 100 million Forecast (2033): USD 150 million CAGR 2026-20...