Thrombin playstheroleincardiovasculardiseasesandregulatesmanyprocessesininflammation and
could beafeatureofmanypathologicalconditions,includingthethromboembolicdisease,cancerand
neurodegenerativediseases.Anultrasensitiveandamplified electrochemicalsandwichassayusing
screen-printedcarbonelectrode(SPCE)stripsforthrombindetectionwasestablishedinthisstudy.The
conductivity andsensingperformanceofthecarbonelectrodeswereenhancedbyusinggold
nanoparticles (AuNPs).Theaptameraddressedonthestripswasusedasaprimaryprobetocapture
thrombin inthedetectedsamples.Anamplifier wasinventedforrecognizingthrombincapturedonthe
SPCE, whichisthemultiplemoleculesofanti-thrombinantibody(Ab)andhorseradishperoxidase(HRP)
co-modified AuNPs(AuNPs/Ab–HRP). HydrogenperoxidewasusedasthesubstrateforHRPandthenthe
response current(RC)couldbedetected.TheoptimizationoftheseAuNPsconjugates-amplified aptamer
immunosensing SPCEstripswasconductedforthrombindetection.Thedetectionsensitivityshoweda
linear relationbetweenRCandthrombinconcentrationintherangeof10pM–100nM,andlimitof
detection (LOD)was1.5pM.ThefabricatedAuNPs/Ab–HRP-amplified aptamerimmunosensingSPCE
strips werefurtherusedtodetectthrombininhumanserumwithalinearrangeof100pM–100nM.This
study providedthepromisingSPCEstripswithhighlysensitiveandrapiddetectionforthrombinbythe
electrochemical aptasensorcombinedwithAuNPsconjugatesforamplifyingthedetectionsignal