Optische und röntgenographische Untersuchungen an Pigmenten

Abstract

Marsgellbs durch W a g n e r festgestellt. Die Untersuchungen des letzteren an Chromgelb sind noch nicht abgeschlo-en, doah hat sich bis jetzt gezeigt, dab wir in den technisch herstelllbren Sorten eine rhombische und eine monokline Mdifikation finden.Dadurch erhalten die bekannten B o c k d e n Hypothesen und auch die alteren Arbeiten des Verf. zusammen mit S a u e r umd K e i d e l eine n e w Deutung. B o c k 2) war der erste, der koll-emische EnbRnntnisse fiir die Ghrcumgelbfabrikation nutzbar machte m d dalmit dieses Gebiet den Handen der Empiriker entri5. Er studierte vor allem die Nachrotung des Chromgelbr

Dynamics of Copper Deposition onto Silicon by Galvanic Displacement

“…17 At this potential, sometimes denoted as the mixed potential, electrons are consumed in the reduction halfreaction at the same rate as they are formed in the oxidation half-reaction. 18 OCP transients have been measured during galvanic deposition of Cu on rotating Zn and Al disks, 6,19 as well as on Si in stagnant solutions. [20][21][22] These measurements allowed sensitive detection of changes in reaction conditions, but they were not used to quantitatively assess the deposition mechanism.…”

The Physics of Semiconductors

“…Also, recombination in the depletion layer and hole injection from the metal are possible. The transport of electrons above the barrier can be described with diffusion theory [554,555] or thermionic-emission theory [556]. In both cases the barrier height is large compared to kT .…”

The physics of Schottky barriers

“…Two apparently quite distinct theories have been proposed to describe process 4(i). Historically, the first of these was the so-called diffusion theory of Wagner (1931) and Schottky and Spenke (1939). According to this theory, the current is supposed to be limited by the ordinary processes of diffusion and drift operating within the space-charge region where the bands are bent.…”