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- Title
An investigation of Structural Properties of Monometallic (Ag, Pd) and Bimetallic (Ag@Pd) Nanoparticles Growth on Macro Porous Silicon.
- Authors
Hashim, Duaa A.; Alwan, Alwan M.; Jawad, Muslim F.
- Abstract
Monometallic nanoparticle Ag, Pd and bimetallic nanoparticles Ag@Pd with wellcontrolled morphology, uniform size, and regular alloy structure were produced by an ion reduction process with dangling bonds of porous layer Psi to fabricate monometallic(Ag, Pd) /macro Psi and bimetallic (Ag@Pd) /macro Psi hetro-structure. Psi substrate was synthesized by Photo-electrochemical etching (PECE) with a laser power density (15 mW/cm2), monometallic structure has been synthesized by dipping fresh Psi sample in salt solutions (AgNO3 and PdCl2) for about 5 min, while bimetallic nanoparticles was synthesized by dipping Psi in mix solution at a ratio (1:1) for about 2 and 4 min. The monometallic and bimetallic nanoparticles were confirmed by scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersive X-ray analysis (EDS). The results show that the composition of Ag@Pd alloy nanoparticles was uniformly dispersed and well-defined distribution on Psi surface; having an average size of (8 to 7.1) nm is smaller than monometallic nanoparticles sizes. The lower Ag@PdNPs size and therefore a higher specific surface area (S.S.A) were obtained for about (71 to 63.8) m2/gm, these high specific area is most important for different application such as: chemicals or gas sensing.
- Subjects
NANOPARTICLES; POROUS silicon; PHOTOELECTROCHEMICAL etching; MORPHOLOGY; SUBSTRATES (Materials science)
- Publication
International Journal of Nanoelectronics & Materials, 2018, Vol 11, Issue 4, p461
- ISSN
1985-5761
- Publication type
Article