Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 43, Pages 37699-37708Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b13329
Keywords
silver nanowire; stability; self-assembled monolayer; mercapto functional azoles; transparent heater
Funding
- National High Technology Research and Development Program of China 863 Program [2015AA033408]
- Science and Technology Projects of Guangdong Province [2015B090915003, 2016B010111003, 2016A010101017]
- National Natural Science Foundation of China [61575084]
- Science and Technology Project of Guangzhou [201803010097, 201707010500, 201807010077]
- Science and Technology Planning Project of Guangdong Province for Industrial Applications [2017B090917001]
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Instability of silver nanowire (AgNW) has been regarded as a major obstacle to its practical applications in optoelectrical devices as transparent electrodes. Physical barrier layers such as polymer, metal, and graphene have been generally employed to improve the stability of AgNW in previous study. Herein, we first report self-assembled organothiols as an inhibitor for AgNW to achieve an overall enhancement in antioxidation, antisulfidation, thermal stability, and anti-electro-migration. The self-assembled monolayers (SAMs) of phenyl azoles, methoxy silane, and methyl alkane were formed on the surface of AgNW via Ag-S covalent bond as barrier layers which provided protective effects against corrosives (e.g., O-2, H2S). In particular, the decoration of 2-mercaptobenzimidazole (MBI) offered the best resistance to H2S and excellent stability under a high-temperature and high-humidity environment (85 degrees C and 85 RH %) for 4 months. Moreover, different SAMs exhibited a stabilizing or destabilizing effect on Plateau Rayleigh instability of AgNW, which realized the tunability of degradation temperature of AgNWs, for example, increasing by >= 100 degrees C with MBI SAM or decreasing by similar to 50 degrees C with octadecanethiol SAM compared with pristine AgNWs. Notably, the MBI-decorated AgNWs could survive at 400 degrees C which is by far the highest bearing temperature for solution-processed AgNW film. As a result, a transparent heater made of the MBI-AgNWs exhibited superior heating characteristics (higher working temperature and durability), as compared with the pristine AgNW-based heater. Our findings on the organothiols decoration not only provide a new paradigm in overall stability improvement of NW of noble metals but also show the potential in morphology controllability of metal NW.
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