Fairly　monodisperse　＂dog　bone＂　shaped　gold　nanorods　were　obtained　clean　and　in　high　yield.　Their　average　aspect　ratio　could　be　adjusted　from　similar　to　2　to　similar　to　3　by　altering　the　amount　of　silver　nitrate　present　in　the　growth　solution.　They　were　coated　with　a　uniform,　ultrathin　shell　of　silica　and　used　to　detect　parathion　pesticide　on　an　orange　peel　by　shell-isolated　nanoparticle-enhanced　Raman　spectroscopy　(SHINERS).