Insight has a successful track record of investing in advanced materials companies, he said.
"We look forward to working together and benefiting from their advice, counsel and contacts,” Arthur said.
Single and multiwall carbon nanotubes consist of a hollow cylinder of carbon with a diameter equal to approximately one nanometer — a billionth of a meter.
Carbon nanotubes possess extraordinary optical and electronic properties, tremendous strength and flexibility, and high thermal and chemical stability.
Today, carbon nanotubes are used in a wide range of applications in the automotive, aeronautics, electronics, displays, energy and health care markets.
"The materials we are making are materials with incredible properties ... the strongest materials known to man,” Arthur said.
And that made SouthWest an inviting partner for Insight investors, he said.