第40卷第2期2023年3月新疆大学学报(自然科学版)(中英文)JournalofXinjiangUniversity(NaturalScienceEditioninChineseandEnglish)Vol.40,No.2Mar.,2023基于自支撑多孔硅微腔的DNA光学检测∗马仲伟,谢洁荣,吕长武†(新疆大学物理科学与技术学院,新疆乌鲁木齐830017)摘要:用电化学蚀刻在单晶硅表面制备了多孔硅微腔(PSM),并通过大电流脉冲分离制成了一种自支撑多孔硅微腔结构.将该结构用于8个碱基对的DNA片段检测,根据折射率变化引起透射角度谱的移动量检测与探针DNA分子发生偶联反应的目标DNA分子的不同浓度.目标DNA分子在0.1∼1.0μmol/L的浓度区间,透射角度谱红移量随着目标DNA分子浓度的增加而增大,并且有较好的线性关系,检测限达0.037μmol/L.自支撑多孔硅微腔检测生物分子时表现出灵敏度高、响应时间快、免标记、成本低等优点,可应用于便携式光学传感器.关键词:自支撑多孔硅微腔;透射角度谱;DNA传感DOI:10.13568/j.cnki.651094.651316.2022.03.06.0001中图分类号:O433.4文献标识码:A文章编号:2096-7675(2023)02-0196-06引文格式:马仲伟,谢洁荣,吕长武.基于自支撑多孔硅微腔的DNA光学检测[J].新疆大学学报(自然科学版)(中英文),2023,40(2):196-201.英文引文格式:MAZhongwei,XIEJierong,LYUChangwu.DNAopticalsensingbasedonself-supportingporoussiliconmicrocavities[J].JournalofXinjiangUniversity(NaturalScienceEditioninChineseandEnglish),2023,40(2):196-201.DNAOpticalSensingBasedonSelf-SupportingPorousSiliconMicrocavitiesMAZhongwei,XIEJierong,LYUChangwu(SchoolofPhysicsandTechnology,XinjiangUniversity,UrumqiXinjiang830017,China)Abstract:Poroussiliconmicrocavities(PSM)werepreparedonthesurfaceofsinglecrystalsiliconbyelectro-chemicaletching,andaself-supportingporoussiliconmicrocavitystructurewasfabricatedbyhighcurrentpulseseparation.ThestructurewasusedforthedetectionofeightbasepairsofDNAfragments,andthedifferentconcentrationsofthetargetDNAmoleculescoupledtotheprobeDNAmoleculesweredetectedaccordingtotheshiftofthetransmissionanglespectrumcausedbythechangeofrefractiveindex.TheredshiftofthetransmissionanglespectrumincreaseswiththeincreasesofthetargetDNAmoleculesconcentrationsintheconcentrationrangeof0.1∼1.0μmol/L,andhasgoodlinearitywi...