Size-selective electrodeposition of meso-scale metal particles: a general method
2001; Elsevier BV; Volume: 47; Issue: 5 Linguagem: Inglês
10.1016/s0013-4686(01)00747-2
ISSN1873-3859
AutoresH Liu, Frèdéric Favier, Karen Mei Pou Ng, Michael Zäch, Reginald M. Penner,
Tópico(s)Ion-surface interactions and analysis
ResumoMetal nano- and microparticles that are narrowly dispersed in diameter can be electrodeposited on graphite basal plane surfaces using the two-step method: First, a voltage pulse with a duration of 5 ms and an overpotential, η=−500 mV was used to nucleate metal particles on the graphite surface. Then, a growth pulse with an overpotential, η, of −20 to −250 mV was applied to grow the metal particles obtained in step 1 to the desired final diameter. For a variety of metals, including silver, gold, platinum, molybdenum, and nickel, this 'slow-growth' method yielded dispersions of particles ranging in diameter from 50 nm to 2 μm having a relative standard deviation (RSDdia=σdia/〈dia〉) as low as 7%.
Referência(s)