Over the past few years, NANOSAM from Krakow have made a lot of progress in understanding dangling-bonds on the Si/Ge(001):H surface. The reason why these dangling-bonds are so enticing is that it that they can be created with atomic precision - and that this can be done fast. So if we can understand the physics of dangling bonds, perhaps this could be the basis of quantum computing.
However, this subject is far from simple and NANOSAM needed the theoretical help of our Founder, Mads Engelund, then working as an academic researcher. To understand the measurement models of the interaction between electrons and atomic motion had to be used.
With this help, NANOSAM was able to explain the physical mechanism behind strange STM topographic features and hysteresis features in STS measurements.
In a multi-year effort NANOSAM has investigated how three-branched molecules, or "Y"-molecules, move around and absorb to dangling-bond sites on Si/Ge(001):H.
Q: Why dangling-bond sites? A: They can be created quickly in atomically precise patterns!
Q: Why evaporate molecules? A: The atomically precise dangling-bond sites could be used to create atomically precise molecular structures - potentially build almost anything!
Q: Why three-branched molecules? A: No matter how you turn them they remain the same - less uncertainty and less complexity!
Our Founder, Mads Engelund, aided in this on-going work by quickly relaxing an enourmous amount of possible guessed configurations. Only by many trials and many errors where we able to figure out the likely molecular configurations giving rise to the STM patterns observed in the experiments.