.png){kind=icon}
.png){kind=icon}
Return
Selective growth of I-phase copper molybdenum sulphide two-dimensional nanostructures and evaluation of their optical and pseudocapacitive properties
.png){kind=icon}
PRE
AI
C
S
R
S
DOI：10.1007/s11051-026-06589-y.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Copper molybdenum sulphide (CMS), a ternary transition metal dichalcogenide (TMD), is interesting because of its two-dimensional (2D) nanostructure. Unlike the well-investigated binary layered molybdenum disulphide (MoS2) counterpart, there is scope to explore phase, morphological, stoichiometric, and defect-related electronic properties with respect of its technological potential. In this study, off-stoichiometric CMS (Cu2MoS4) colloidal nanostructures (6.4-12.4 nm) were grown under variable conditions of temperature (190-300 degrees C) and time (5-30 min). The nanostructures crystallize in the body centred tetragonal structure of the I-phase (I-CMS) and display a correlation of particle size, thickness, layering, and composition with growth conditions. Growth temperature influences their layer stacking, whilst growth time influences their lateral dimension. The off-stoichiometric nanostructures are copper and molybdenum-rich rendering shallow-lying acceptor states of copper adatoms and donor states of vacancies of sulphur. These, along with surface trapping states, are likely implicated in tunable UV-visible absorption with indirect bandgaps (2.6-2.8 eV), as well as broad visible photoluminescence which tails into the NIR region involving fast radiative recombination of lifetimes (0.29-3.35 ns). Additionally, electrodes of the I-CMS nanostructures display slightly variable pseudocapacitance of charge-storage, primarily via sodium ion intercalation with a good specific capacitance of similar to 86 F g(-1) at 5 mV s(-1) scan rate. Importantly, this is the first study involving the growth of Cu2MoS4 via colloidal hot injection as a facile route for phase selectivity, composition, morphology, and electronic properties for applications such as photovoltaics, optoelectronics, and pseudocapacitive electrodes for energy storage devices.
Keywords:
Copper molybdenum sulphide
Transition metal dichalcogenides
Two-dimensional (2D) nanostructures
I-phase
Optical properties
Pseudocapacitance properties
Journal
IF:
2.6
Papers:
379
Citations:
1.3W
Organization
Cited Papers