Mattox did research in astrophysics from 1986 until 2006. Here is bibliography of over 100 publications in astrophysics for which Mattox is an author or co-author.
In 2008, Mattox was motivated by the growing climate and energy problems that humanity faces to
re-orient his research to renewable energy technology and policy.
Here is his energy blog.
In 2009, Mattox initiated a collaboration between FSU and the FREEDM Systems Center at NCSU, an NSF supported Engineering Research Center that is developing concepts and technology to create a smart-grid. He has been appointed to be FSU's contact for the FSU- FREEDM collaboration.
World energy supply and the ramifications of a plateau in conventional petroleum production.
Innovation in energy efficiency and conservation.
Improving the energy efficiency of thermal management in the built environment.
Research on the electrification of transportation - and the utilization of solar power for this.
Research on the collection and utilization of solar heat (for purposes such as domestic hot water).
Research on the extraction of energy from waste organic matter through anerobic digestion to produce methane for utilization by a fuel cell, Brayton (and possibly also Rankin) cycle turbines, or a reciprocating engine; possibly in the context of a combined heat and power (CHP) application.
Climate change, climate change mitigation, climate change education, and energy education.
The potential for extremely safe nuclear power.
The problem of sulfation in lead acid storages batteries - here is a 2009 poster on this.
Potential opportunies for new or enhanced hydroelectric power generation.
Here are slides he used in a presentation entitled, Energy and the Future of Humanity given at the Recyclique in Durham, NC, on 10/5/12.
Mattox wrote FSU's report on global warming in 2008 in response to a request from Marc Basnight, President pro tempore of the NC Senate, that each UNC Campus report on this topic.