Direct laser micropatterning of GeSe2 nanostructures film with controlled optoelectrical properties

Abstract

We demonstrate that a direct focused laser beam irradiation is able to achieve localized modification on GeSe 2 nanostructures (NSs) film. Using scanning focused laser beam setup, micropatterns on GeSe 2 NSs film are created directly on the substrate. Controlled structural and chemical changes of the NSs are achieved by varying laser power and treatment environment. The laser modified GeSe 2 NSs exhibit distinct optical, electrical and optoelectrical properties. Detailed characterization is carried out and the possible mechanisms for the laser induced changes are discussed. The laser modified NSs film shows superior photoconductivity properties as compared to the pristine nanostructure film. The construction of micropatterns with improved functionality could prove to be useful in miniature optoelectrical devices.

Understanding of multi-level resistive switching mechanism in GeOx through redox reaction in H2O2/sarcosine prostate cancer biomarker detection

“…1d . In similar way, it is reported that the position of main O 1s peak which remains bonded with GeO x at BE of 531.2 ± 0.2 eV while the rest one at 532.1 ± 0.2 eV indicates the chemisorbed oxygen 32 . In our study, V O ’s plays the most important role to originate the formation-free resistive switching via oxidation state changes of Ge 4+ /Ge 0 in W/GeO x /W structure.…”

A Focused Laser Beam: A Useful and Versatile Tool for 1D Nanomaterials Research: A Review

“…These demonstrations indicate that the focused laser pruning could enhance the potential of these CdS x Se 1ex nanobelts in optoelectronic applications as photoswitches and photodetectors. Similar conductivity and photoconductivity modification was observed in laser pruning of GeSe 2 nanoribbons [19] . Around 3 times increase in the output current after laser modification at 10 V is revealed by the dark IeV curves.…”

“…Our group demonstrated laser pruning induced electrical and photoelectrical property enhancement by characterization of CdS x Se 1ex and GeSe 2 nanobelts [19,20] . The pristine CdS x Se 1ex nanobelts are poor conductors as shown by the typical IeV curve in Fig.…”

“…Besides directed patterning of 1D CNT arrays, the focused laser beam technique can also be employed to other 1D semiconductors including Si nanowires [17] , CuO nanowires [18] , GeSe 2 nanoribbons [19] and even ternary CdS x Se 1ex nanobelts [20] . By changing [11].…”

Strong Opto-Structural Coupling in Low Dimensional GeSe3 Films

“…Annealing is observed to induce slight peak shifts, but more notably an increase in the GeO x intensity, which is indicative of surface oxidation. 40 Figure 3g highlights the changes in the Se-3d peak from annealing. There is a blueshift in the peak, which is suggestive of spin−orbit splitting.…”