Question: Philip Ball is a columnist for a peer-reviewed scientific journal published by Nature Publishing Group that was launched in September of what year?
Context: Nature Chemistry is a monthly peer-reviewed scientific journal published by Nature Publishing Group.  It was established in April 2009.  The editor-in-chief is Stuart Cantrill.  The journal covers all aspects of chemistry.  Publishing formats include primary research articles, reviews, news, views, highlights of notable research from other journals, commentaries, book reviews, correspondence.  Other formats are analysis of issues such as education, funding, policy, intellectual property, and the impact chemistry has on society. Neuropsychopharmacology is a peer-reviewed scientific journal published by the Nature Publishing Group.  It has been the official publication of the American College of Neuropsychopharmacology since 1987.  The journal covers topics in neuropsychopharmacology, including clinical and basic science research into the brain and behavior, the properties of agents acting within the central nervous system, and drug targeting and development. Philip Ball (born 1962) is a British science writer.  For over twenty years he has been an editor of the journal "Nature" for which he continues to write regularly.  He now writes a regular column in "Chemistry World".  He has contributed to publications ranging from "New Scientist" to the "New York Times", "The Guardian", the "Financial Times" and "New Statesman".  He is the regular contributor to "Prospect" magazine, and also a columnist for "Chemistry World", "Nature Materials" and BBC Future.  He has broadcast on many occasions on radio and TV, and in June 2004 he presented a three-part serial on nanotechnology, "Small Worlds", on BBC Radio 4. Nature Energy is a monthly peer-reviewed scientific journal published by the Nature Publishing Group.  The editor-in-chief is Nicky Dean.  The 2017 efficiency record (26.6%) in solar cell technology was published in the journal. Nature Materials, is a peer-reviewed scientific journal published by Nature Publishing Group.  It was launched in September 2002.  Vincent Dusastre is the launching and current chief editor. Nature Publishing Group is a division of the international scientific publishing company Springer Nature that publishes academic journals, magazines, online databases, and services in science and medicine.  Nature Publishing Group's flagship publication is "Nature", a weekly multidisciplinary journal first published in 1869.  It also publishes "Nature" research journals, "Nature Reviews" journals (since 2000), and society-owned academic journals.  Springer Nature also publishes "Scientific American" in 16 languages, a magazine intended for the general public.  In 2013, Nature Publishing Group bought a controlling stake in Frontiers. The European Journal of Human Genetics is a monthly peer-reviewed scientific journal published by the Nature Publishing Group on behalf of the European Society of Human Genetics.  It covers all aspects of human genetics. Nature Climate Change is a monthly peer-reviewed scientific journal published by Nature Publishing Group covering all aspects of research on global warming, especially its effects.  It was established in 2011.  Its first editor-in-chief was Olive Heffernan and the journal's current editor-in-chief is Bronwyn Wake.  According to the "Journal Citation Reports", the journal had a 2016 impact factor of 19.304. Nature Photonics is a peer-reviewed scientific journal published by the Nature Publishing Group.  The editor-in-chief is Oliver Graydon.  The journal covers research related to optoelectronics, laser science, imaging, communications, and other aspects of photonics and was established in January 2007.  "Nature Photonics" publishes review articles, research papers, News and Views pieces, and research highlights summarizing the latest scientific findings in optoelectronics.  This is complemented by a mix of articles dedicated to the business side of the industry covering areas such as technology commercialization and market analysis.  The papers that have been published in this journal are internationally acclaimed for maintaining high research standards.  The journal is regarded as top-ranking in the field of photonics. Nature Ecology and Evolution is a monthly peer-reviewed scientific journal published by Nature Publishing Group covering all aspects of research on Ecology.  It was established in 2017.  Its first and current editor-in-chief is Patrick Goymer.
Answer: 2002