# Key Points from #hplusroadmap IRC Discussion

• Participants debated open hardware licensing approaches, contrasting standard licenses like GPL with custom "personal and experimental use" licenses, noting that non-standard licenses can inhibit collaboration and derivative works.

• Carbon nanotube (CNT) actuator technology was discussed, highlighting research showing CNT sheets in electrolyte solutions can deflect up to a centimeter with 1-volt DC potential and oscillate at 15+ Hz.

• Several CNT manufacturing methods were compared, including chemical vapor deposition, STM-based synthesis, and a carbon arc plasma method using sucrose with copper electrodes yielding 20% purity CNTs.

• The group explored unusual findings in CNT synthesis, particularly how a 90-degree angle between electrodes produces the highest yield when using ferrocene-nickelocene catalyst mixtures with xylene.

• MIT's mobile FabLabs were mentioned as a model for bringing fabrication resources to communities, sparking discussion about the trade-offs between temporary access and permanent local facilities.

• Advanced defense concepts were shared, including a paper describing protective domes using ball bearings and Tefzel film as potential missile defense systems.

• Participants exchanged information about high-power lighting and laser technologies, including 28,000 lumen LED arrays, diode lasers, and RF-excited krypton arc lamps for pumping Nd:YAG lasers.