UCLA doctoral student Yilin Wong noticed that some tiny dots had appeared on one of her samples, which had been accidentally left out overnight. The layered sample consisted of a germanium wafer ...

A logarithmic spiral with a diameter of 500 μm, approximately half the diameter of a sewing needle. Curiosity about a mistake that left tiny dots on a germanium wafer with evaporated metal films led ...

This study examines the relationship between enamel acid etch pattern and bond strength. Bond strength and etch patterns vary between tooth type and between teeth within a tooth type. An 'ideal' ...

Bond strength and etch patterns vary between tooth type and between teeth within a tooth type. An 'ideal' enamel etch pattern is not essential for high bond strength. Objectives: The aim of the study ...

Curiosity about a mistake that left tiny dots on a germanium wafer with evaporated metal films led to the discovery of beautiful spiral patterns etched on the surface of the semiconductor by a ...