Semiconductoremetal nanocomposites have been widely investigated to modify the intrinsic properties of materials used for optoelectronic devices and sensing applications.In this study,a method for rapid synthesis of M...Semiconductoremetal nanocomposites have been widely investigated to modify the intrinsic properties of materials used for optoelectronic devices and sensing applications.In this study,a method for rapid synthesis of MoS_(2)-Ag nanocomposites via laser-assisted photoreduction was proposed.For the photoreduction process,we used AgNO_(3)solution as a metal source.Under laser irradiation,Ag ions were easily reduced on MoS_(2)by photo-generated electrons from MoS_(2).The optical properties of MoS_(2)-Ag nanocomposites were easily controlled by simple adjustment of the photoreduction time.To investigate the surface-enhanced Raman scattering(SERS)effect of the MoS_(2)-Ag nanocomposites,the SERS spectra of methylene blue(MB)on MoS_(2)-Ag nanocomposites were measured,and the nanocomposites were found to enhance the Raman scattering intensity of MB up to~106.Therefore,the laser-assisted photoreduction method has great potential for rapid synthesis and optical tuning of semiconductoremetal nanocomposites.展开更多
While two-dimensional layered nanomaterials including transition metal oxides and transition metal dichalcogenides have been widely researched because of their unique electronic and optical properties,they still have ...While two-dimensional layered nanomaterials including transition metal oxides and transition metal dichalcogenides have been widely researched because of their unique electronic and optical properties,they still have some limitations.To overcome these limitations,transition metal oxides and transition metal dichalcogenides based nanocomposites have been developed using various methods and have exhibited superior properties.In this paper,we introduce the photodeposition method and review the photodeposition of metal nanoparticles on the surface of transition metal oxide and transition metal dichalcogenides.Their current applications are also explained,such as photocatalysis,hydrogen evolution reaction,surface enhanced Ramanscattering,etc.This approach for nanocomposites has potential for future research areas such as photocatalysis,hydrogen evolution reaction,surface enhanced Raman scattering,and other applications.This approach for nanocomposite has the potential for future research areas.展开更多
基金supported by the National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIT).(NRF-2020R1A2C4002557)It was also supported by Basic Science Research Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Education.(NRF-2021R1A6A3A13045573)Miri Choi at the KBSI(Chuncheon)is thanked for technical assistance with the FE-TEM analysis.
文摘Semiconductoremetal nanocomposites have been widely investigated to modify the intrinsic properties of materials used for optoelectronic devices and sensing applications.In this study,a method for rapid synthesis of MoS_(2)-Ag nanocomposites via laser-assisted photoreduction was proposed.For the photoreduction process,we used AgNO_(3)solution as a metal source.Under laser irradiation,Ag ions were easily reduced on MoS_(2)by photo-generated electrons from MoS_(2).The optical properties of MoS_(2)-Ag nanocomposites were easily controlled by simple adjustment of the photoreduction time.To investigate the surface-enhanced Raman scattering(SERS)effect of the MoS_(2)-Ag nanocomposites,the SERS spectra of methylene blue(MB)on MoS_(2)-Ag nanocomposites were measured,and the nanocomposites were found to enhance the Raman scattering intensity of MB up to~106.Therefore,the laser-assisted photoreduction method has great potential for rapid synthesis and optical tuning of semiconductoremetal nanocomposites.
基金KK and JR acknowledge the financial support from the Young Investigator Award program through the National Research Foundation(NRF)of Koreafunded by the Ministry of Science,ICT&Future Planning of Republic of Korea(NRF-2017R1C1B2011750&NRF-2015R1C1A1A02036464).
文摘While two-dimensional layered nanomaterials including transition metal oxides and transition metal dichalcogenides have been widely researched because of their unique electronic and optical properties,they still have some limitations.To overcome these limitations,transition metal oxides and transition metal dichalcogenides based nanocomposites have been developed using various methods and have exhibited superior properties.In this paper,we introduce the photodeposition method and review the photodeposition of metal nanoparticles on the surface of transition metal oxide and transition metal dichalcogenides.Their current applications are also explained,such as photocatalysis,hydrogen evolution reaction,surface enhanced Ramanscattering,etc.This approach for nanocomposites has potential for future research areas such as photocatalysis,hydrogen evolution reaction,surface enhanced Raman scattering,and other applications.This approach for nanocomposite has the potential for future research areas.
